# Airworthiness directives that may apply: N191CH

A list on [N191CH](https://openairdocs.org/aircraft/N191CH.md).

Matched by this aircraft’s airframe and engine models. Each AD’s applicability may narrow it by serial number, part number or equipment.

- [AD 2025-07-01](https://openairdocs.org/ad/2025-07-01.md): Air Data Computer · Effective May 15, 2025
- [AD 2023-11-07](https://openairdocs.org/ad/2023-11-07.md): Ground Proximity System · Effective Jun 22, 2023 · Supersedes AD 2021-23-13
- [AD 2012-14-10](https://openairdocs.org/ad/2012-14-10.md): Main Rotor Mast/Swashplate · Effective Aug 7, 2012
- [AD 2005-24-05](https://openairdocs.org/ad/2005-24-05.md): Quill shaft · Effective Dec 8, 2005
- [AD 88-14-03](https://openairdocs.org/ad/88-14-03.md): Main Rotor Hubs · Effective Jul 5, 1988
- [AD 88-12-09](https://openairdocs.org/ad/88-12-09.md): Main Rotor Shaft · Effective Jun 2, 1988
- [AD 87-11-05 R4](https://openairdocs.org/ad/87-11-05-R4.md): Components Fatigue Failure · Effective May 14, 1987
- [AD 83-07-06](https://openairdocs.org/ad/83-07-06.md): Synchronizing Shaft · Effective Apr 4, 1983
- [AD 80-25-08](https://openairdocs.org/ad/80-25-08.md): Tension-Torsion Strap Assemblies · Effective Dec 12, 1980
- [AD 64-21-06 R2](https://openairdocs.org/ad/64-21-06-R2.md): Sockets & Rotor Housings · Effective Jul 7, 1980
- [AD 80-11-08](https://openairdocs.org/ad/80-11-08.md): Cyclic Stick Boots · Effective May 28, 1980
- [AD 76-25-03](https://openairdocs.org/ad/76-25-03.md): Main Rotor Blade Spars · Effective Dec 10, 1976
- [AD 73-08-01](https://openairdocs.org/ad/73-08-01.md): Aft Transmission Quill Shaft · Effective Mar 11, 1975
- [AD 74-17-02](https://openairdocs.org/ad/74-17-02.md): Rotor Blade Inspection System · Effective Aug 13, 1974
- [AD 72-16-10](https://openairdocs.org/ad/72-16-10.md): Aft Transmission Ring · Effective Aug 11, 1972
- [AD 66-13-05](https://openairdocs.org/ad/66-13-05.md): Fire Detection System · Effective Jun 18, 1966
- [AD 64-06-07](https://openairdocs.org/ad/64-06-07.md): Stability Augmentation Systems · Effective Mar 7, 1964
- [AD 63-24-04](https://openairdocs.org/ad/63-24-04.md): Quill Shafts And Collector Gears · Effective Nov 27, 1963
- [AD 63-13-05](https://openairdocs.org/ad/63-13-05.md): Forward Rotor Transmission · Effective Jul 3, 1963
- [AD 2015-20-09](https://openairdocs.org/ad/2015-20-09.md): Life-limited rotating parts · Effective Nov 18, 2015 · Supersedes AD 2001-18-06, AD 2008-22-16
- [AD 2005-04-10](https://openairdocs.org/ad/2005-04-10.md): Stage 1 compressor disks · Effective Mar 29, 2005
- [AD 2004-04-06](https://openairdocs.org/ad/2004-04-06.md): Fuel flow divider assemblies · Effective Mar 9, 2004
- [AD 2001-12-07](https://openairdocs.org/ad/2001-12-07.md): Fuel Flow Divider Assemblies · Effective Jul 2, 2001
- [AD 97-21-08](https://openairdocs.org/ad/97-21-08.md): Stage 1 forward cooling plate · Effective Dec 19, 1997
- [AD 97-19-17](https://openairdocs.org/ad/97-19-17.md): Critical rotating parts · Effective Nov 28, 1997
- [AD 94-07-05](https://openairdocs.org/ad/94-07-05.md): Turbine Wheels · Effective Apr 19, 1994
- [AD 81-18-03](https://openairdocs.org/ad/81-18-03.md): Fuel Controls · Effective Sep 17, 1981
- [AD 81-02-02](https://openairdocs.org/ad/81-02-02.md): Stage One Turbine Wheels · Effective Feb 2, 1981
- [AD 78-26-08](https://openairdocs.org/ad/78-26-08.md): Lube Pump Drive Shaft · Effective Dec 19, 1978
- [AD 67-01-02](https://openairdocs.org/ad/67-01-02.md): Rotor Discs · Effective Aug 24, 1976
- [AD 76-13-02](https://openairdocs.org/ad/76-13-02.md): Oil Cooler-To-Fuel Filter Hose · Effective Jul 6, 1976
- [AD 74-25-01](https://openairdocs.org/ad/74-25-01.md): Fuel System Hose · Effective Dec 10, 1974
- [AD 69-17-03](https://openairdocs.org/ad/69-17-03.md): First and Second Stage Turbine Rotor Discs · Effective Aug 27, 1969
- [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13.md): Ground Proximity System · Historical · Effective Dec 9, 2021 · Replaced by AD 2023-11-07
- [AD 2008-22-16](https://openairdocs.org/ad/2008-22-16.md): Repetitive heavy lift (RHL) · Historical · Effective Dec 1, 2008 · Replaced by AD 2015-20-09
- [AD 2001-18-06](https://openairdocs.org/ad/2001-18-06.md): Engine Life-limited Rotating Parts · Historical · Effective Oct 18, 2001 · Replaced by AD 2015-20-09
- [AD 69-23-02](https://openairdocs.org/ad/69-23-02.md): Stage 2 Compressor Rotor Disc Shafts · Historical · Effective Oct 15, 1970 · Replaced by AD 2001-18-06
- [AD 79-23-04](https://openairdocs.org/ad/79-23-04.md): Turboshaft Engines Rotating Components · Historical · Replaced by AD 2001-18-06

## 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.effective_date, m.matched_by
FROM (
  SELECT ad_id, min(rank) AS rank, arg_min(matched_by, rank) AS matched_by
  FROM (SELECT ad_id, 1 AS rank, 'airframe' AS matched_by FROM 'https://openairdocs.org/data/latest/faa_aircraft_model_directive.parquet' WHERE aircraft_model_code = '1385005'
    UNION ALL SELECT ad_id, 2, 'engine' FROM 'https://openairdocs.org/data/latest/faa_engine_model_directive.parquet' WHERE engine_model_code = '30129')
  GROUP BY ad_id
) m JOIN 'https://openairdocs.org/data/latest/faa_directive.parquet' d USING (ad_id)
ORDER BY d.status = 'Historical', m.rank, coalesce(d.effective_date, d.publication_date, d.issue_date) DESC, d.ad_number DESC
```

This list as a web page: https://openairdocs.org/aircraft/N191CH/ads

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