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.
N277AC is a British Aerospace Avro 146-RJ85A in the FAA registry (aircraft page). Matched on type certificate model AVRO 146-RJ85A.
RESULTS
5 ADs in effect may apply to N277AC
- In effect5
- Recurring2
- Superseded or removed0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 2000-11-15 One-time Engine
Honeywell International Inc. (Formerly AlliedSignal Inc.) ALF502R and LF507 Series Turbofan Engines
To prevent critical life-limited rotating engine part failure, which could result in an uncontained engine failure and damage to the airplane.
Applicability, as the AD words it
Honeywell International Inc. (formerly AlliedSignal, Textron Lycoming and Avco Lycoming) ALF502R and LF507 series turbofan engines, installed on but not limited to British Aerospace BAe 146-100A, BAe 146-200A, BAe 146-300A, AVRO 146-RJ70A, AVRO 146-RJ85A, and AVRO 146-100A series airplanes.
- AD 2000-05-14 Recurring Engine
AlliedSignal Inc. ALF502 and LF507 Series Turbofan Engines
To prevent a No. 4 and 5 duplex bearing failure, which can result in a Stage 4 low pressure turbine (LPT) rotor failure, an uncontained engine failure, and damage to the airplane.
Applicability, as the AD words it
Allied Signal Inc. (formerly Textron Lycoming and Avco Lycoming) ALF502 and LF507 series turbofan engines, installed on but not limited to British Aerospace BAe 146- 100A, BAe 146-200A, BAe 146-300A, AVRO 146-RJ70A, AVRO 146-RJ85A, AVRO 146-RJ100A, and Canadair Model CL-600-1A11 series airplanes.
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British Aerospace Model Avro 146-RJ85A and RJ100A Series Airplanes
Applicability, as the AD words it
Model Avro 146-RJ85A and RJ100A series airplanes, as listed in British Aerospace Service Bulletin SB.57-55, dated April 27, 1998, certificated in any category.
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British Aerospace Model BAe Avro 146-RJ Series Airplanes
Applicability, as the AD words it
Model BAe Avro 146-RJ85A series airplanes, serial numbers E2296, E2297, E2299, E2300, E2302, E2303, E2304, E2305, E2306, and E2307; and Model Avro 146-RJ100A series airplanes, serial numbers E3298, E3301, and E3308; certificated in any category.
- AD 97-05-11 Recurring Engine
AlliedSignal Inc. ALF502 and LF507 Series Turbofan Engines
To prevent No. 4 and 5 duplex bearing failure, which can result in a Stage 4 low pressure turbine (LPT) rotor failure, an uncontained engine failure, and damage to the aircraft.
Applicability, as the AD words it
AlliedSignal Inc. and Textron Lycoming Model ALF502 and LF507 series turbofan engines, installed on but not limited to British Aerospace BAe146-100A, BAe146-200A, BAe146-300A, AVRO 146-RJ70A, AVRO 146-RJ85A, AVRO 146-RJ100A, and Canadair Model CL-600-1A11 series aircraft.
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.