# Airworthiness directives, 1991

FAA airworthiness directives effective in 1991: 291 ADs with their full text, status and the aircraft they apply to.

Page 1 of 6 · 291 ADs

- [AD 91-25-03 R1](https://openairdocs.org/ad/91-25-03-R1.md): Main Landing Gear Brakes · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more · Effective Dec 31, 1991
- [AD 91-25-10](https://openairdocs.org/ad/91-25-10.md): Forward Lower Pressure Bulkhead · Boeing DC-10-10 · Effective Dec 27, 1991
- [AD 91-26-02](https://openairdocs.org/ad/91-26-02.md): AFM Changes - Engine Bleed Air · Bombardier DHC-8-102 and DHC-8-103 · Effective Dec 23, 1991
- [AD 91-25-09](https://openairdocs.org/ad/91-25-09.md): Elevator Trim Tab Actuator Support · Embraer EMB-110P1 and EMB-110P2 · Effective Dec 23, 1991
- [AD 91-24-13](https://openairdocs.org/ad/91-24-13.md): Vertical Pylon Forward Spar Cap and Web · Sikorsky S-76A · Effective Dec 20, 1991
- [AD 91-23-16](https://openairdocs.org/ad/91-23-16.md): Manifold Pressure Operations · Aerostar PA-60-700P (Aerostar 700P) · Effective Dec 20, 1991
- [AD 91-25-06](https://openairdocs.org/ad/91-25-06.md): Thrust Reverser Auxiliary Track · Boeing 737-300 Series, 737-400 Series and 737-500 Series · Effective Dec 18, 1991
- [AD 91-25-05](https://openairdocs.org/ad/91-25-05.md): Electrical Feeder Cable · Gulfstream Aerospace G-1159A and G-IV · Effective Dec 18, 1991
- [AD 91-23-08](https://openairdocs.org/ad/91-23-08.md): Rudder Trim Tab · Mitsubishi Heavy Industries MU-2B-10, MU-2B-15, MU-2B-20 and 2 more · Effective Dec 18, 1991
- [AD 91-23-06](https://openairdocs.org/ad/91-23-06.md): Horizontal Stabilizer Attach Fittings · F.28 Mark 0100, F.28 Mark 1000, F.28 Mark 2000 and 2 more · Effective Dec 17, 1991
- [AD 91-23-05](https://openairdocs.org/ad/91-23-05.md): Aileron/Rudder Servomounts · F.28 Mark 0100 · Effective Dec 17, 1991
- [AD 91-22-08](https://openairdocs.org/ad/91-22-08.md): Main Landing Gear Wheel Well Pressure · Boeing 727-100 Series, 727-100C Series, 727-200 Series and 3 more · Effective Dec 13, 1991
- [AD 91-24-08](https://openairdocs.org/ad/91-24-08.md): Outboard Flaps · Boeing MD-11 and MD-11F · Effective Dec 12, 1991
- [AD 91-25-01](https://openairdocs.org/ad/91-25-01.md): Horizontal Stabilizer Trim · Gulfstream Aerospace LP 1125 Westwind Astra · Effective Dec 10, 1991
- [AD 91-23-03](https://openairdocs.org/ad/91-23-03.md): Fuel System · APEX CAP 10 B · Effective Dec 10, 1991
- [AD 91-23-02](https://openairdocs.org/ad/91-23-02.md): Carburetor Air Intake Box · Aviat A-1 · Effective Dec 10, 1991
- [AD 91-23-12](https://openairdocs.org/ad/91-23-12.md): Main Landing Gear Braking Effectiveness · Lockheed Martin L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15 and 1 more · Effective Dec 9, 1991
- [AD 91-23-01](https://openairdocs.org/ad/91-23-01.md): Nose Landing Gear Fork · Textron 77 · Effective Dec 3, 1991
- [AD 91-22-07](https://openairdocs.org/ad/91-22-07.md): MLG Outboard Door · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more · Effective Dec 3, 1991
- [AD 91-22-05](https://openairdocs.org/ad/91-22-05.md): Stowage Bins · Boeing 747-100 Series, 747-100B Series, 747-100B SUD Series and 6 more · Effective Nov 29, 1991
- [AD 91-22-04](https://openairdocs.org/ad/91-22-04.md): Main Cargo Door · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 9 more · Effective Nov 29, 1991
- [AD 91-21-13](https://openairdocs.org/ad/91-21-13.md): Fuel Shutoff Cable Pulley Bracket · Boeing 737-300 Series, 737-400 Series and 737-500 Series · Effective Nov 29, 1991
- [AD 91-21-10](https://openairdocs.org/ad/91-21-10.md): Leading Edge Slats · Boeing 767-200 Series, 767-300 Series and 767-300F Series · Effective Nov 29, 1991
- [AD 91-21-09](https://openairdocs.org/ad/91-21-09.md): Air Induction System · Piper PA-24-260 · Effective Nov 29, 1991
- [AD 91-21-03](https://openairdocs.org/ad/91-21-03.md): Electrical Wiring · Boeing DC-9-11, DC-9-12, DC-9-13 and 19 more · Effective Nov 29, 1991
- [AD 91-23-09](https://openairdocs.org/ad/91-23-09.md): Electrical Power System · Boeing 747-400 Series and 747-400D Series · Effective Nov 27, 1991
- [AD 91-20-02](https://openairdocs.org/ad/91-20-02.md): Fuel Manifolds · General Electric CF6-80C2A1, CF6-80C2A2, CF6-80C2A3 and 12 more · Historical · Effective Nov 25, 1991 · Replaced by AD 2014-21-01
- [AD 91-17-01](https://openairdocs.org/ad/91-17-01.md): Elevator Trim Tab Actuators · Textron 35-33, 35-A33, 35-B33 and 40 more · Effective Nov 25, 1991
- [AD 91-23-13](https://openairdocs.org/ad/91-23-13.md): Fan Disks · General Electric CF6-50A, CF6-50C, CF6-50C1 and 12 more · Effective Nov 22, 1991
- [AD 91-21-08](https://openairdocs.org/ad/91-21-08.md): Tailplane Lower Skin Panel · Airbus BAC 1-11 200 Series and BAC 1-11 400 Series · Effective Nov 19, 1991
- [AD 91-21-07](https://openairdocs.org/ad/91-21-07.md): Trim Relays · Boeing DC-9-11, DC-9-12, DC-9-13 and 20 more · Effective Nov 19, 1991
- [AD 91-21-06](https://openairdocs.org/ad/91-21-06.md): Engine/Nose Cowl · BAE Systems BAe 146-100A, BAe 146-200A and BAe 146-300A · Effective Nov 19, 1991
- [AD 91-21-04](https://openairdocs.org/ad/91-21-04.md): Inspect For Cracks · Airbus BAC 1-11 200 Series and BAC 1-11 400 Series · Effective Nov 19, 1991
- [AD 91-20-10](https://openairdocs.org/ad/91-20-10.md): Main Rotor Grip · Scotts-Bell 47 47G-2, 47G-2A, 47G-2A-1 and 11 more · Effective Nov 14, 1991
- [AD 91-22-06](https://openairdocs.org/ad/91-22-06.md): Placard Operating Limitations · Vulcanair P 68, P 68 Observer, P 68B and 3 more · Effective Nov 12, 1991
- [AD 91-21-12](https://openairdocs.org/ad/91-21-12.md): Radio Control Panels · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 13 more · Effective Nov 12, 1991
- [AD 91-18-10](https://openairdocs.org/ad/91-18-10.md): Brake Wear Limits · Boeing 767-200 Series, 767-300 Series and 767-300F Series · Effective Nov 12, 1991
- [AD 91-20-06](https://openairdocs.org/ad/91-20-06.md): Engine Fire Extinguishing System · Boeing 747-100 Series, 747-100B Series, 747-100B SUD Series and 3 more · Effective Nov 7, 1991
- [AD 91-20-05](https://openairdocs.org/ad/91-20-05.md): Inspect Skin & Cleats · Airbus BAC 1-11 200 Series and BAC 1-11 400 Series · Effective Nov 7, 1991
- [AD 91-20-04](https://openairdocs.org/ad/91-20-04.md): Stabilizer Trim Assembly · Boeing 737-300 Series, 737-400 Series and 737-500 Series · Effective Nov 7, 1991
- [AD 91-18-14](https://openairdocs.org/ad/91-18-14.md): Passenger and Service Doors · BAE Systems BAe 146-100A, BAe 146-200A and BAe 146-300A · Effective Nov 7, 1991
- [AD 91-22-01](https://openairdocs.org/ad/91-22-01.md): Electrical Wires · Cessna 210, 210-5 (205), 210-5A (205A) and 14 more · Effective Nov 4, 1991
- [AD 91-20-08](https://openairdocs.org/ad/91-20-08.md): Fresh Air Blower Housing · Textron A36, A36TC, B36TC and 3 more · Effective Oct 31, 1991
- [AD 91-21-11](https://openairdocs.org/ad/91-21-11.md): Slat Drive Mechanism Brackets · McDonnell Douglas DC-9-81, DC-9-82, DC-9-83 and 2 more · Historical · Effective Oct 30, 1991 · Replaced by AD 99-21-06
- [AD 91-21-05](https://openairdocs.org/ad/91-21-05.md): Wing Rear Spar · McDonnell Douglas DC-10-10, DC-10-10F, DC-10-15 and 4 more · Historical · Effective Oct 23, 1991 · Replaced by AD 94-23-01
- [AD 91-21-02](https://openairdocs.org/ad/91-21-02.md): Management Control Units · Boeing DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83) and 1 more · Effective Oct 23, 1991
- [AD 91-18-19](https://openairdocs.org/ad/91-18-19.md): Pilot Shoulder Harnesses · Hawker Beechcraft 58 Model or Series (all), 58A, 58P and 11 more · Historical · Effective Oct 21, 1991 · Replaced by AD 2009-25-01
- [AD 90-03-10](https://openairdocs.org/ad/90-03-10.md): Tail Rotor Grips · Arrow Falcon Exporters UH-1H, UH-1F, 204B and 33 more · Effective Oct 18, 1991
- [AD 90-13-01 R1](https://openairdocs.org/ad/90-13-01-R1.md): Tail Rotor Blade Assembly · Bell Helicopter Textron Canada 206B, 206L, 206L-1 and 1 more · Effective Oct 17, 1991
- [AD 91-18-13](https://openairdocs.org/ad/91-18-13.md): Pitot/Static Heaters · Short Brothers SD3-30 and SD3-60 · Effective Oct 16, 1991

Next page: https://openairdocs.org/ad.md?year=1991&page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT d.ad_number, d.status, d.subject, d.makes, d.models, d.effective_date
FROM 'https://openairdocs.org/data/latest/faa_directive.parquet' d
WHERE year(coalesce(d.effective_date, d.publication_date, d.issue_date)) = 1991
ORDER BY coalesce(d.effective_date, d.publication_date, d.issue_date) DESC, d.ad_number DESC
```

This list as a web page: https://openairdocs.org/ad?year=1991

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