# AD 78-15-02: MLG Side Brace Bolts

- Type: Airworthiness directive
- Status: Current
- Products: Mooney M20F and M20J
- Effective: August 1, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3270
- Registered aircraft: 2,137 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D1DAA5EEDF711F1C86256A3B007133A2.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/78-15-02

## The airworthiness directive

78-15-02 MOONEY AIRCRAFT CORPORATION: Amendment 39-3270. Applies to Models M20F airplanes, all serial numbers, and M20J airplanes, serial numbers 24-0001 through 24-0609 certificated in all categories. Compliance is required as indicated unless already accomplished. To prevent possible failure of the main landing gear side brace bolts, accomplish the following: Within the next 90 days after the effective date of this AD, replace the main landing gear side brace bolts in accordance with Mooney Service Bulletin No. M20-212 dated March 1, 1978, or equivalent methods approved by the Chief, Engineering and Manufacturing Branch, FAA, Southwest Region. This amendment becomes effective August 1, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 2A3](https://openairdocs.org/tcds/2A3): Mooney International Corporation; names 2 of 17 models: M20F, M20J

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 2,137 (2,137 by airframe model, 0 by engine model)
- Makers: Mooney 2,129, Aerostar Acft Corp Of Texas 8

Models with the most aircraft:

- [Mooney M20J](https://openairdocs.org/model/mooney-m20j): 1,408 aircraft (airframe model)
- [Mooney M20F](https://openairdocs.org/model/mooney-m20f): 721 aircraft (airframe model)
- [Aerostar Acft Corp Of Texas M20F](https://openairdocs.org/model/aerostar-acft-corp-of-texas-m20f): 8 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/78-15-02/models.md
Every aircraft: https://openairdocs.org/ad/78-15-02/aircraft.md

Its text cites no advisory circulars or STCs.

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