Airworthiness Directive Lookup Free FAA AD search by N-number, make or model
Find the FAA airworthiness directives that may apply to an aircraft: 12,857 ADs from the Federal Register since 1995, through Oct 1, 2026, each with its applicability text and the official document. Free, no account.
N39FN is a 1974 Learjet 35 (certified family) in the FAA registry (aircraft page). Matched on type certificate model 35.
RESULTS
24 ADs in effect may apply to N39FN
- In effect24
- Recurring6
- Superseded or removed3
Informational only. These are FAA airworthiness directives whose published applicability names this make and model. Whether an AD applies to a particular aircraft depends on its serial number, installed engines, propellers, parts and modifications, and some ADs listed here will not apply. This list is not the official AD record and not a compliance determination: confirm applicability and compliance against the FAA’s Dynamic Regulatory System and the aircraft’s records with a certificated mechanic or inspector. Covers ADs published in the Federal Register since 1995, through Oct 1, 2026; older ADs, and engine, propeller and appliance ADs that do not name the aircraft, are not included.
Also show 3 superseded or removed N39FN’s registration record
- AD 2022-05-01 One-time
Learjet, Inc., Airplanes
This AD was prompted by a report indicating that a repair station performed a life extension program on spoiler assemblies that had reached or were close to reaching their life limit.
Applicability, as the AD words it
This AD applies to Learjet, Inc., Model 35, 35A (C-21A), 36, 36A, 55, 55B, 55C, and 60 airplanes, certificated in any category, with any spoiler assembly that meets any of the criteria identified in paragraph (c)(1) or (2) of this AD. (1) The spoiler assembly's life limit was extended by Restored Aircraft Sales and Service, LLC. (2) The maintenance records related to the life limit for the spoiler assembly are missing or incomplete.
- AD 2010-06-11 One-time Engine
Honeywell International Inc. TFE731 Series Turbofan Engines
We are issuing this AD to prevent an uncontained failure of a second stage LPCR disc and/or a third stage LPCR disc due to cracks in the bore, which could result in damage to the airplane.
Applicability, as the AD words it
This AD applies to Honeywell International Inc. TFE731-2, TFE731-2A, TFE731-2C, TFE731-3, TFE731-3A, TFE731-3AR, TFE731-3B, TFE731-3BR, TFE731-3C, TFE731-3CR, TFE731-3D, TFE731-3DR, TFE731-3R, TFE731-4, TFE731-4R, TFE731-5, TFE731-5AR, TFE731-5BR, and TFE731-5R series turbofan engines with certain second stage low-pressure compressor rotor (LPCR) discs, part number (P/N) 3072396-1 or 3075190-1, and/or certain third stage LPCR discs, P/N 3072397-1 or 3075192-1, installed. These engines are installed on, but not limited to, the airplanes listed in Table 1 of this AD. Table 1--Installed on Airplanes by Manufacturer Manufacturer Model Dassault-Aviation or Dassault Aviation. Falcon 10 (Falcon 100) and Mystere-Falcon 20, 50, 900 and MF900 series. Cessna Aircraft Company: Model 650, Citation III, VI, and VII. Gulfstream Aerospace LP: 1125 Westwind Astra. Israel Aircraft Industries: 1124 and 1124A (Westwind). Learjet Inc: 31, 31A, 35, 35A, 36, 36A, 55, 55B, 55C, and M31. Lockheed Martin Corporation (formerly 1329-23A, 1329-23D, 1329-23E, Lockheed-Georgia). and 1329-25. Raytheon Corporate Jets (formerly DH.125 Series 1A, 3A, and 3A/ British Aerospace and Hawker RA, HS.125 Series F3B and F3B/ Beechcraft Corporation). RA, BH.125 and DH.125 Series 400A, HS.125 Series 403B, F400B, and F403B, HS.125 Series 600A, BH.125 Series 600A, HS.125 Series F600B, 700A, and 700B, BAe.125 Series 800 and 1000, and Hawker 800 and 850XP series.
- AD 2006-16-18 One-time
Sandel Avionics Incorporated Model ST3400 Terrain Awareness Warning System/Radio Magnetic Indicator (TAWS/RMI) Units Approved Under Technical Standard Order(s) C113, C151a, or C151b; Installed on Various Small and Transport Category Airplanes
We are issuing this AD to prevent a bearing error, which could lead to an airplane departing from its scheduled flight path, which could result in a reduction in separation from, and a possible collision with, other aircraft or terrain.
Applicability, as the AD words it
This AD applies to Sandel Avionics Incorporated (Sandel) Model ST3400 terrain awareness warning system/radio magnetic indicator (TAWS/RMI) units approved under Technical Standard Order(s) C113, C151a, or C151b; as identified in Sandel ST3400 Service Bulletin SB3400-01, Revision B, dated September 15, 2004; as installed on various small and transport category airplanes, certificated in any category, including, but not limited, to the airplane models listed in Table 1 of this AD. Table 1.--Manufacturers/Airplane Models Manufacturer Airplane model(s) Airbus: A300. Avions Marcel Dassault-Breguet Aviation (AMD/BA).. Falcon 10. Boeing: 727, 737, 747. Bombardier (LearJet): 24, 35, 36, 55. British Aerospace (Operations) Limited: Jetstream Series 3101. Cessna: 208, 208B, 421C; 501, 525, 550, 560, 650, S550. Embraer: EMB-120. Dassault-Aviation: Mystere-Falcon 50, Mystere-Falcon 200. Gulfstream: G-I, G-1159A (G-III) Israel Aircraft Industries (IAI): 1124, 1125 Westwind Astra. McDonnell Douglas: DC-10. Piper: PA-31T2. Raytheon: 58; 1900D, 400; A36; BAe.125 Series 800A; HS.125 Series 600A/700A; Hawker 800-XP; 200, 300, 350; A200, B100, B200, B300, C90, C90A, C90B, E90, F90; MU-300-10. Sabreliner: 60 (NA-265-60). Twin Commander: 500-A, 695A. Viking Air Limited: DHC-6.
- AD 2008-02-19 One-time Engine
Honeywell International Inc. TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, -20R, -20AR, -20BR, -40, -40AR, -40R, and -60 Series Turbofan Engines
We are issuing this AD to prevent uncontained failure of the HP turbine rotor assembly, which could result in damage to the airplane.
Applicability, as the AD words it
This AD applies to Honeywell International Inc. (Honeywell) TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, - 20R, -20AR, -20BR, -40, -40AR, -40R, and -60 series turbofan engines with certain high pressure (HP) turbine rotor discs part numbers and serial numbers. These engines are installed on, but not limited to, the following airplanes: Avions Marcel Dassault Mystere-Falcon 10 and 50 Series Cessna Model 650; Citations III, VI, and VII Dassault-Aviation 20, 50, 50EX, 900, MF900, and 900EX (900DX) Series Gulfstream Aerospace LP (formerly IAI) 1125 Westwind Astra, Astra SPX, Gulfstream 100 Series Israel Aircraft Industries (IAI) 1124 Series (Westwind 1124) Learjet 31, 35, 36, 45 (or Learjet 40), and 55 Series Lockheed-Georgia 3329-25 Series (731 Jetstar, Jetstar II) Raytheon Corporate Jets (formerly British Aerospace) Hawker 800 and 850 Series Sabreliner NA-265-65 (Sabreliner 65)
- AD 2007-17-17 One-time
Learjet Model 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C Airplanes, and Model 45 Airplanes
We are issuing this AD to prevent penetration of flammable liquids or fire through the engine firewall into the engine pylon, which could lead to fire inside the airplane.
Applicability, as the AD words it
This AD applies to Learjet Model 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C airplanes, and Model 45 airplanes; certificated in any category; as identified in the service information specified in Table 1 of this AD. Table 1.--Applicable Service Information Learjet airplane model Service Bulletin Revision level Date 31/31A: Bombardier Service 1: August 21, 2006. Bulletin 31-54-2. 45: Bombardier Service 2: August 15, 2003. Bulletin 45-54-3. 35/35A (C-21A) and 36/36A: Learjet Service Original: March 16, 2001. Bulletin 35/36-54-3. 55/55B/55C: Learjet Service Original: March 16, 2001. Bulletin 55-54-3.
- AD 2007-04-18 One-time
Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C Airplanes
We are issuing this AD to prevent this inadvertent operation, which could result in inadvertent fuel transfer by the left or right wing fuel system and subsequent over-limit fuel imbalance between the left and right wing fuel loads.
Applicability, as the AD words it
This AD applies to the Learjet models identified in the applicable Bombardier service bulletin listed in Table 1 of this AD. Table 1.--Applicability by Service Bulletin Bombardier service bulletin Revision level Date Learjet model(s) SB 23-28-6: Original: April 21, 1998: 23. SB 24/25-28-3: 2: February 21, 1998: 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, and 24F-A airplanes; and 25, 25A, 25B, 25C, 25D, and 25F airplanes. SB 28/29-28-4: 3: June 2, 1999: 28 and 29 airplanes. SB 31-28-7: 3: January 26, 2001: 31 and 31A airplanes. SB 35/36-28-11: 4: December 4, 2000: 35 and 35A (C-21A) airplanes; 36 and 36A airplanes. SB 55-28-13: 3: December 15, 2000: 55, 55B and 55C airplanes.
- AD 2005-16-09 Recurring
Learjet Model 23, 24, 25, 35, and 36 Airplanes
We are issuing this AD to prevent significant reduction in the lateral control of the airplane due to imbalance of the fuel loads in the wings of the airplane.
Applicability, as the AD words it
This AD applies to the airplanes in Table 1 of this AD, certificated in any category. Table 1.--Applicability Learjet-- Serial numbers-- Model 23 airplanes: 23-003 through 23-090 inclusive. Model 24 airplanes: 24-100 through 24-357 inclusive. Model 25 airplanes: 25-002 through 25-373 inclusive. Model 35 airplanes: 35-002 through 35-676 inclusive. Model 36 airplanes: 36-002 through 36-063 inclusive.
- AD 2005-13-36 One-time
Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), and 36 Airplanes
This AD was prompted by a report indicating that an aileron cable failed on one affected airplane when the cable underwent a tension check.
Applicability, as the AD words it
This AD applies to Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), and 36 airplanes; certificated in any category; as identified in the Bombardier alert service bulletins in Table 1 of this AD. Table 1.--Service Bulletins Bombardier alert service bulletin Date Model A23/24/25-27-17: December 23, 2002: 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, and 25F airplanes. A28/29-27-24: December 23, 2002: 28 and 29 airplanes. A31-27-25: December 23, 2002: 31 and 31A airplanes. A35/36-27-42: December 23, 2002: 35, 35A (C-21A), and 36 airplanes.
- AD 2005-13-07 One-time Engine
Honeywell International Inc. (Formerly AlliedSignal Inc. and Garrett Turbine Engine Co.) TFE731-2 and -3 Series Turbofan Engines
We are issuing this AD to prevent LP turbine rotor disk separation, which could result in an uncontained engine failure and damage to the airplane.
Applicability, as the AD words it
This AD applies to Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Co.) TFE731-2 and -3 series turbofan engines with the following low pressure (LP) 1st and 2nd stage turbine rotor disc part numbers (P/Ns), with serial numbers (SNs) listed in Tables 1, 2, and 3 of Honeywell International Inc. SB No. TFE731-72-3682, dated November 26, 2002, initially installed as new parts before April 1, 1991: Part Numbers 3072069-All: 3073014-All 3072070-All: 3073113-All 3072351-All: 3071114-All 3072542-All: 3074103-All 3073013-All: 3074105-All (All denotes all dash numbers installed) These engines are installed on, but not limited to, the following airplanes: Avions Marcel Dassault Mystere-Falcon 10 and 50 series Cessna Model 650, Citation III, and Citation VI Gulfstream Aerospace LP (formerly IAI) 1125 Westwind Astra series Israel Aircraft Industries (IAI) 1124 series Learjet 31, 35, 36, and 55 series Lockheed-Georgia 1329-25 series (731 Jetstar, Jetstar II) Raytheon Corporate Jets (formerly British Aerospace) DH/HS/BH-125 series; Sabreliner NA-265-65 (Sabreliner 65)
- AD 2005-05-15 Recurring Engine
Honeywell International Inc. TFE731-2 and -3 Series Turbofan Engines
We are issuing this AD to prevent uncontained failure of the LPT stage 1 disk, and possible damage to the airplane.
Applicability, as the AD words it
This AD applies to Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Co.) TFE731-2 and -2C series, and TFE731-3, -3A, -3AR, -3B, -3BR, and -3R series turbofan engines, with low pressure turbine (LPT) stage 1 disks, part numbers (P/Ns) 3072070-All, 3072351-All, 3073013-All, 3073113-All, 3073497- All, and 3074103-All, (where All denotes all dash numbers), installed. These engines are installed on, but not limited to, the following airplanes: Avions Marcel Dassault Falcon 10 and Mystere Falcon 50 series Learjet 31, 35, 36, and 55 series Lockheed-Georgia 1329-25 series Israel Aircraft Industries 1124 series and 1125 Westwind series Cessna Model 650, Citations III and VI Raytheon British Aerospace HS-125 series Sabreliner NA-265-65
- AD 2004-03-08 Recurring
Learjet Model 31, 31A, 35, 35A (C-21A), 36, and 36A Airplanes
To prevent significant structural damage to the engine pylons, possible separation of the engines from the fuselage, and consequent reduced controllability of the airplane.
Applicability, as the AD words it
The following airplanes, certificated in any category, as applicable: Table 1.--Applicability As Listed in Bombardier Service Bulletin-- Model-- 31 and 31A Airplanes: 31-51-2, dated February 1, 2001; and 31- 51-3, Revision 1, dated August 2, 2001. 35, 35A (C-21A), 36 and 36A 35/36-51-3, dated February 1, 2001; and Airplanes. 35/36-51-4, Revision 1, dated August 2, 2001.
- AD 2001-23-09 One-time Engine
Honeywell International Inc. TFE731-2, -3, and -4 Series Turbofan Engines
To prevent failure of the fan rotor disc due to fatigue cracking in the dovetail slots, which could result in in-flight engine shutdown, uncontained engine failure, and damage to the airplane.
Applicability, as the AD words it
This airworthiness directive (AD) is applicable to Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Co.) TFE731-2, -3, and -4 series turbofan engines, with fan rotor discs part numbers (P/N's) 3072162-All, 3072816-All, 3073436- All, 3073539-All, and 3074529-All (where All denotes all dash numbers). These engines are installed on, but not limited to, Avions Marcel Dassault Falcon 10, 50, and 100 series; Learjet 31, 35, 36, and 55 series; Lockheed-Georgia 1329-23 and -25 series; Israel Aircraft Industries 1124 series and 1125 Westwind series; Cessna Model 650, Citations III, VI, and VII; Raytheon British Aerospace HS-125 series; and Sabreliner NA-265-65 airplanes.
- AD 2001-07-11 One-time
Learjet Model 23, 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes
Applicability, as the AD words it
All Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D- A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A military), 36, 36A, 55, 55B, and 55C airplanes; certificated in any category.
- AD 2000-24-19 One-time
Learjet Model 35, 35A, 36, and 36A Series Airplanes
To prevent incapacitation of the flightcrew and consequent loss of control of the airplane due to delays in donning oxygen masks in response to the activation of the cabin altitude warning horn.
Applicability, as the AD words it
Model 35, 35A, 36, and 36A series airplanes, certificated in any category.
- AD 2000-15-09 Recurring Engine
Honeywell International Inc. TFE731-2, -3, -4, and -5 Series Turbofan Engines
To prevent failure of the HPC impeller due to fatigue cracking.
Applicability, as the AD words it
Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Company) TFE731-2, -3, -4, and -5 series turbofan engines with high pressure compressor (HPC) impeller part numbers (P/Ns) 3073393-1, 3073394-1, 3073433-1, 3073434-1, 3073398- All (All denotes all dash numbers), 3073435-All, and 3075171-All, installed on, but not limited to, Avions Marcel Dassault-Breguet Aviation (AMD-BA) Falcon 10, Dassault-Aviation Mystere-Falcon 50, and 900 series airplanes; Dassault Aviation Mystere-Falcon 20 series airplanes; Learjet Inc. Models 31, 35, 36, and 55 series airplanes; Lockheed-Georgia Corporation 1329-23 and 25 series airplanes; Israel Aircraft Industries Ltd. 1124 series and 1125 Westwind series airplanes; Cessna Aircraft Co. Model 650 Citation III, VI, and VII series airplanes; Raytheon Aircraft Co. HS-125 series airplanes; and Sabreliner Corporation NA-265-65 airplanes.
- AD 99-23-19 One-time
Learjet Model 31, 31A, 35, 35A, and 60 Airplanes
To prevent failure of the spoiler actuator, which could result in the spoiler panel floating and inducing an uncommanded roll of the airplane.
Applicability, as the AD words it
Model 31 and 31A airplanes, serial numbers 31- 033, 31-105, 31-114, 31-126, and 31-150 through 31-161 inclusive; Model 35 and 35A airplanes, serial numbers 35-065, 35-242, 35-300, 35-323, 35-447, 35-622, and 35-670; and Model 60 airplanes, serial numbers 60-029, 60-050, 60-120 through 60-139 inclusive; certificated in any category.
- AD 98-17-01 One-time Engine
AlliedSignal Inc. TFE731 Series Turbofan Engines
To prevent cracked fuel tubes and the subsequent leakage of fuel on and around electrical components, which can cause an engine fire.
Applicability, as the AD words it
AlliedSignal Inc. (formerly Allied-Signal Aerospace Company, Garrett Engine Division and Garrett Turbine Engine Co.) TFE731-2, -3, and -4 series turbofan engines with fuel tubes, part numbers (P/Ns) 3071051-1, 3073729-1, or 3072886-1, installed. These engines are installed on but not limited to the following airplanes: Avions Marcel Dassault Falcon 10, 50, and 100 series; Cessna Model 650, Citation III, VI, and VII; Learjet 31 (M31) 35, 36 and 55 series, Raytheon British Aerospace HS-125 series; and Sabreliner NA-265-65.
- AD 97-05-03 One-time Appliance
AlliedSignal Avionics, Inc. Models GNS- Xls and GNS-Xl Flight Management Systems
To prevent deviation from an intended flight path during a non- precision approach to an airport caused by inaccurate information from the GPS flight management system.
Applicability, as the AD words it
Models GNS-Xls and GNS-Xl global positioning systems (GPS), part numbers (P/N) 17960-0102-XXXX and P/N 18355- 0101-XXXX, respectively, installed on, but not limited to the following aircraft, certificated in any category: Manufacturer Models British Aerospace, Ltd. (BAe): 146-100A and 146-200A Cessna Aircraft Corporation: 525, 550, and 560 Dausault Aviation: Mystere-Falcon 20 and 50 Avions Marcel Dassault: Falcon 10 Gulfstream Aerospace: G-1159 (G-II) and G-1159A (G- III) Raytheon Corporate Jets: Hawker 800 Israel Aircraft Industries, Ltd: 1124 Sabreliner Corporation: NA-65 Learjet Inc: 35 Jetstream Aircraft Ltd: 4101
- AD 96-19-13 One-time
Gates Learjet Model 35 and 36 Series Airplanes Modified by Raisbeck Supplemental Type Certificate (STC) SA766NW
To prevent deterioration of the airplane's lateral control characteristics as a result of aileron buffet or buzz.
Applicability, as the AD words it
Model 35, 35A, 36, and 36A series airplanes; certificated in any category; that have been modified in accordance with Raisbeck Group Supplemental Type Certificate (STC) SA766NW, and that do not have one of the airplane serial numbers listed in Table 1 of this AD. Table 1.--Serial Numbers* NOT affected by this AD 35-023 35A-092 35A-192 36-004 35-034 35A-093 35A-203 36-017 35-042 35A-095 35A-206 36-028 35-044 35A-118 35A-207 36A-029 35-047 35A-127 35A-209 36A-031 35A-068 35A-132 35A-228 36A-038 35A-073 35A-135 35A-231 36A-043 35A-075 35A-145 35A-244 36A-044 35A-076 35A-172 35A-245: 35A-086 35A-185 36-003: *Airplanes having the serial numbers listed in Table 1 are subject to similar requirements mandated by AD 85-16-04, amendment 39-5110.
- AD 96-18-13 One-time Engine
AlliedSignal Inc. TFE731 Series Turbofan Engines
To prevent uncontained failure of the fan rotor disk due to fatigue cracking in the dovetail slots, which can result in inflight engine shutdowns, severe secondary damage, and fan rotor assembly separation from the engine.
Applicability, as the AD words it
AlliedSignal Inc. (formerly Garrett Engine Division) Models TFE731-2, -2A, -3, -3A, -3AR, -3B, -3BR, -3C, -3CR, -3D, -3DR, -3R, and -4R turbofan engines, installed on, but not limited to the following aircraft: Avions Marcel Dassault Falcon 10, 50, 100 series; Learjet 31, 35, 36, and 55 series; Lockheed-Georgia 1329-23 and -25 series; Israel Aircraft Industries 1124 series and 1125 Westwind series; Cessna Model 650, Citations III, VI, and VII; Raytheon British Aerospace HS-125 series; and Sabreliner NA-265-65. Note: This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
- AD 96-05-03 Recurring Engine
AlliedSignal Inc. TFE731 Series Turbofan Engines
To prevent uncontained failure of fan rotor disks due to fatigue cracking in the dovetail slots, which can result in inflight engine shutdowns, severe secondary damage, and fan rotor assembly separation from the engine.
Applicability, as the AD words it
AlliedSignal Inc. (formerly Garrett Engine Division) TFE731-2, -2A, -3, -3A, -3AR, -3B, -3BR, -3C, -3CR, -3D, - 3DR, -3R, and -4R series turbofan engines with fan rotor disk part numbers (P/N's) 3072162-1 through -5, 3072816-1, -2, and -3, 3073436-1 through -5, 3073539-(All), and 3074529-(All), where (All) denotes any dash number, installed on but not limited to the following aircraft: Avions Marcel Dassault Falcon 10, 50, 100 series; Learjet 31, 35, 36, and 55 series; Lockheed-Georgia 1329-23 and -25 series; Israel Aircraft Industries 1124 and 1125 series; Cessna 650, Citations III, VI, and VII; Raytheon British Aerospace HS-125 series; and Sabreliner NA-265-65. Note: This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must use the authority provided in paragraph (b) to request approval from the Federal Aviation Administration (FAA). This approval may address either no action, if the current configuration eliminates the unsafe condition, or different actions necessary to address the unsafe condition described in this AD. Such a request should include an assessment of the effect of the changed configuration on the unsafe condition addressed by this AD. In no case does the presence of any modification, alteration, or repair remove any engine from the applicability of this AD.
- AD 96-04-01 One-time Engine
AlliedSignal Inc. TFE731 Series Turbofan Engines
To prevent an uncontained failure of the fan rotor disk due to fatigue cracking in the dovetail slots, which can result in inflight engine shutdowns, severe secondary damage, and fan rotor assembly separation from the engine.
Applicability, as the AD words it
AlliedSignal Inc. (formerly Garrett Engine Division) TFE731-2, -2A, -3, -3R series turbofan engines with fan rotor disks, part numbers (P/N's) 3072162-1 through -4, 3073436-1 through -4, 3073539-2, and 3074529-2, installed on, but not limited to: Avions Marcel Dassault Falcon 10, 50, 100 series; Learjet 31, 35, 36 series; Lockheed-Georgia 1329-23, -25 series; Israel Aircraft Industries 1124 series; Raytheon British Aerospace HS125 series; and Sabreliner NA-265-65 aircraft. Note: This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must use the authority provided in paragraph (e) to request approval from the Federal Aviation Administration (FAA). This approval may address either no action, if the current configuration eliminates the unsafe condition, or different actions necessary to address the unsafe condition described in this AD. Such a request should include an assessment of the effect of the changed configuration on the unsafe condition addressed by this AD. In no case does the presence of any modification, alteration, or repair remove any engine from the applicability of this AD.
- AD 95-22-01 Recurring Appliance
Aerospace Lighting Corporation Power Units and Power Supplies
To prevent smoke, fire, electrical shock, and possible electromagnetic interference caused by high voltage arcing in the cabin which, if undetected, could result in personal hazard or loss of the aircraft.
Applicability, as the AD words it
Aerospace Lighting Corporation (ALC) lamp connectors, Part Number (P/N) 31.85.1.A; Series 66 fluorescent lamps; power units, P/N's TR-991, TR-992, AL-0546, and AL-0514; and power supplies, P/N's 1895D and AL-0598. These products are utilized in cabin fluorescent lighting systems, and are installed on, but not limited to, the following aircraft: Airbus Industrie Model A310; Avion Marcel Dassault Breguet Aviation Model Falcon 10; Boeing Airplane Company Models 727, 737, 747, and 757; Raytheon Corporate Jets, Inc. (formerly British Aerospace) Model HS. 125-600A, -700A, - 800A, and -1000A; Bombardier Inc. Canadair Ltd. Models CL-600-1A11, CL-600-2A12, CL-600-2B16, CL-600-2B19, CL-601, CL-601-3A, CL-601-3R; Cessna Aircraft Company Models 550 and 560; Dassault Aviation Models Mystere-Falcon 20 and 50; Empresa Brasileira de Aeronauctica S/A Model Embraer EMB-120; Gulfstream Aerospace Corporation Models G- 159, G-1159, G-1159A, and G-IV; Israel Aircraft Industrie, Ltd. Models 1124 and 1125; Jetstream Aircraft, Ltd. Jetstream Model 310; Learjet Corporation Models Learjet 35 and 36; Saab Aircraft AB Model Saab 340A; and Sikorsky Aircraft Division Model S-76A. Note: This airworthiness directive (AD) applies to each product identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For products that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must use the authority provided in paragraph (e) to request approval from the Federal Aviation Administration (FAA). This approval may address either no action, if the current configuration eliminates the unsafe condition, or different actions necessary to address the unsafe condition described in this AD. Such a request should include an assessment of the effect of the changed configuration on the unsafe condition addressed by this AD. In no case does the presence of any modification, alteration, or repair remove any product from the applicability of this AD.
- AD 95-20-03 One-time
Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes
To prevent rapid decompression of the airplane due to cracking and subsequent failure of certain outflow/safety valves.
Applicability, as the AD words it
Model 24, 25, 28, 29, 31, 35, 36, and 55 series airplanes having airplane serial numbers listed in the Learjet service bulletins listed below; and equipped with Allied Signal outflow/safety valves, number 130406-1 or 102850-5, as identified in Allied Signal Aerospace Alert Service Bulletin 130406-21-A4011, Revision 3, dated January 5, 1995, or 102850-21-A4021, Revision 2, dated October 6, 1994; certificated in any category: Service bulletin Service bulletin reference revision level Service bulletin date Learjet Service Bulletin SB Original: January 3, 1995. 24/25-21-4. Learjet Service Bulletin SB Original: January 3, 1995. 28/29-21-8. Learjet Service Bulletin SB Original: January 3, 1995. 31-21-6. Learjet Service Bulletin SB Original: January 3, 1995. 35/36-21-19. Learjet Service Bulletin SB Original: January 3, 1995. 55/21-10.
Radar reads the logbooks and ties each AD to the entries that show how and when it was complied with, with recurring ADs due by date and hours.
QUESTIONS
AD lookup questions
Sources: FAA final rules under 14 CFR part 39, from the Federal Register; make and model from the FAA aircraft registry. The FAA’s Dynamic Regulatory System holds the official AD list.
What is an airworthiness directive (AD)?
An airworthiness directive is a legally enforceable rule the FAA issues under 14 CFR part 39 when it finds an unsafe condition in an aircraft, engine, propeller or appliance that is likely to exist in others of the same design. It says which products it applies to and what must be done, and by when: an inspection, a part replacement, a modification or a limitation. No one may operate a product to which an AD applies except in accordance with it.
How do I look up the ADs for my aircraft?
Type the N-number, or the make and model, into the box above. Radar finds the aircraft's make and model in the FAA registry and lists every AD published in the Federal Register whose applicability names it, newest first, with the AD's own applicability text and a link to the official document. The FAA's Dynamic Regulatory System (drs.faa.gov) holds the official list.
Does every AD in the results apply to my aircraft?
Not necessarily. An AD can be limited to serial number ranges, to aircraft with certain parts or modifications installed, or to a configuration. The results are ADs that may apply because they name the make and model. A certificated mechanic or inspector determines applicability against the aircraft's serial number and records, and records how each applicable AD was complied with.
What is the difference between a recurring and a one-time AD?
A one-time AD is complied with once, for example by replacing a part. A recurring (repetitive) AD requires an action again at an interval, such as an inspection every 100 hours or every 12 months, until a terminating action ends it. Radar marks an AD Recurring when its text requires repetitive actions; always read the AD for the intervals.
What does superseded mean?
When the FAA replaces an AD with a new one, the old AD is superseded: its requirements are carried into, or replaced by, the new AD. Results show the ADs in effect by default; superseded and removed ADs can be shown for the history.
Where does this data come from?
The Federal Register, where the FAA publishes every AD as a final rule. Radar reads each one from the Federal Register API (12,857 ADs since 1995) and refreshes the list every weekday. Make and model come from the FAA aircraft registry. ADs issued before 1995 are not in the Federal Register's online edition and are not included.
Are engine and propeller ADs included?
Only when their applicability names the aircraft. Most engine and propeller ADs name the engine or propeller model, so check those by the installed engine and propeller models. Appliance ADs that list the aircraft among those the appliance can be installed on are included and marked Appliance.
Know which ADs apply, and where each one was signed off.
Radar reads every logbook page, typed or handwritten, and builds one searchable record per tail: times, inspections, ADs and components, each tied to the page it came from.