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.
N115DS is a 2000 Socata TB-20 Trinidad in the FAA registry (aircraft page). Matched on type certificate model TB-20 TRINIDAD.
RESULTS
1 AD in effect may apply to N115DS
- In effect1
- Recurring0
- Superseded or removed0
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.
- AD 2005-19-11 One-time Engine
Lycoming Engines (Formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, LO-360, AEIO-540, IO-540, O-540, and TIO-540 Series Reciprocating Engines
We are issuing this AD to prevent failure of the crankshaft, which could result in total engine power loss, in-flight engine failure, and possible loss of the airplane.
Applicability, as the AD words it
This AD applies to Lycoming Engines (Formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, LO-360, AEIO-540, IO- 540, O-540, and TIO-540 series reciprocating engines, rated at 300 horsepower (HP) or lower, manufactured new, rebuilt, overhauled after March 1, 1999, or that had a crankshaft installed after March 1, 1999. These engines are installed on, but not limited to, the following aircraft: Engine model Manufacturer Aircraft model IO-540-V4A5: A.M.F: 17-D Mushshak Aero Commander: 500 B, S, U/Merlyn Products Conv. IO-540-E1A5: Aero Commander: 500-E Aerofab: LA 250 Renegade Aeronautica: Agricola Mexicana Quail IO-540-K1F5: Aerostar: 600 Aircraft Mushshak Manufacturing Factory. O-540-E4A5: Aviamilano: F-250 Flamingo IO-540-C4B5: Avions: Pierre Robin HR- 100/250 LO-360-A1G6D: Beech: 76 Duchess O-360-A1G6D: 76 Duchess C-24R Sierra or 200 Sierra Bellanca: Aircraft Aries T- 250 O-540-E4B5: Britten Norman: BN-2 Islander O-540-E4C5: BN-2A & BN-2B Islander IO-540-K1B5: BN-2A Islander Celair: Eagle O-360-A1F6: Cessna: 177 Cardinal O-360-A1F6D: 177 Cardinal O-540-J3C5D: 182-RG Skylane IO-540-AB1A5: 182-S O-360-F1A6: C-172RG Cutlass RG IO-540-AC1A5: C-206 Stationair R-G Cardinal IO-360-A1B6D: R-G Cardinal TIO-540-AK1A: T182T Skylane O-540-L3C5D: TR-182 Turbo Skylane AEIO-540-D4A5: Christen Pitts: S-2S, S-2B IO-540-T4B5D: Commander: 114 IO-540-T4B5: 114B TIO-540-AG1A: 114TC Dornier: DO-28 IO-540-K1J5D: Embraer: EMB-201 Ipanema O-540-B4B5: EMB-710 Corioca EMB-720 Minuano EMB-720 Minuano & EMB-721 Sertanejo EMB-721 Sertanejo AEIO-540-L1B5: Extra-Flugzeugbau. Extra 300 F.F.A: FFA-2000 Eurotrainer H.A.L: HPT-32 O-540-A1A5: Helio Military: H-250 AEIO-360-A1E6: Integrated Systems Omega IO-540-M1C5: King Engineering.. Angel Korean Air: Chang Gong-91 Lake: LA-4-200 Buccaneer O-540-J3A5: Maule: MT-7-260 & M-7-260 MX-7-235 Star Rocket IO-540-W1A5: MX-7-235, MT-7-235 & M7-235 Mod Works: Trophy 212 Conversion IO-360-A3B6: Mooney: 201 M-201 IO-360-A1B6: M-20-J IO-360-A3B6D: M20J-201 TIO-540-AF1B: M20M TLS Bravo Moravan: Z143L Zlin Z242L Zlin Partenavia: P-68 Series Observer IO-540-K1J5: Piper: 600-A Aerostar IO-540-S1A5: 601-A, 601B & 601P Aerostar IO-540-AA1A5: 602P Sequoia O-540-A1B5: PA-23-235 Aztec & PA-24-250 Comanche PA-23-250 Aztec IO-540-J4A5: PA-23-250 Aztec IO-540-C1B5: PA-23-250 Aztec & PA-24-250 Comanche TIO-540-C1A: PA-23-250T Turbo Aztec PA-24-150 Comanche O-540-A1C5: PA-24-250 Comanche O-540-A1D5: PA-24-250 Comanche IO-540-D4A5: PA-24-260 Comanche PA-24-260 Comanche O-540-B2C5: PA-25-235 Pawnee O-540-B2B5: PA-28-235 Cherokee PA-28-235 Cherokee IO-360-C1C6: PA-28R-201 Arrow IO-540-M1A5: PA-31-300 Navajo PA-32-260 Cherokee 6 IO-540-K1G5: PA-32-300 & PA-32- 301 Saratoga IO-540-K1A5: PA-32-300 Cherokee 6 IO-540-K1A5D: PA-32-300 Cherokee 6 IO-540-K1G5D: PA-32-300R Lance PA-32-301R Saratoga IO-360-C1E6: PA-34-200 Seneca I IO-540-K1G5: PA-36-300 Brave O-360-A1H6: PA-44-180 LO-360-A1H6: PA-44-180 Seminole IO-540-K1K5: T-35 Pillan Robin: R-3000/235 O-540-F1B5: Robinson: R-44 Rockwell: 114 Ruschmeyer: MF-85 Saab: MFI-15 Safari or MFI-17 Supporter Scottish Avia: Bulldog Siai Marchetti: S-205 Siai Marchetti: S-208 & SF-260 Siai Marchetti: SF-260 Siai Marchetti: SF-260 Slingsby: Firefly T3A Socata: R-235 Rallye Cuerrier Rallye 235CA IO-540-C4D5D: TB-20 Trinidad TB-200 TIO-540-AB1AD: TB-21 & TB-21-TC Trinidad TC IO-540-AB1A5: Stoddard Hamilton. Glasair IO-540-K1H5: Stoddard Hamilton. Glasair III IO-540-L1C5: Swearingen SX-300 Aircraft. Transava: T-300 Skyfarmer AEIO-360-A1B6: Valmet: L-70 Vinka Wassmer: WA4-21 Yoeman: Aviation YA-1
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.