# AD 77-15-06: Engine Mounts

- Type: Airworthiness directive
- Status: Historical
- Products: SOCATA - Groupe Aerospatiale MS 892A-150, MS 892E-150, MS 893A, MS 893E, Rallye 150 ST and Rallye 150 T
- Effective: August 22, 1977
- Superseded by: [AD 2002-05-04](https://openairdocs.org/ad/2002-05-04)
- Product type: Aircraft, Small airplane
- Amendment: 39-2975
- Registered aircraft: 15 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/16A9DDC5D818642D86256A56005C8AF1.0001
- DRS record last changed: August 7, 2025
- Page: https://openairdocs.org/ad/77-15-06

## The airworthiness directive

77-15-06 MORANE SAULNIER (SOCATA): Amendment 39-2975. Applies to Model MS 892A150, MS 892E150, MS 893A, MS 893E, RALLYE 150T and RALLYE 150ST airplanes, certificated in all categories.

Compliance is required as indicated.

To prevent failure of engine mounts, accomplish the following:

  (a) Within the next 100 hours time in service after the effective date of this AD, unless already accomplished, and thereafter at intervals not to exceed 50 hours time in service from the last inspection, visually inspect the engine mounts for cracks using dye penetrant in accordance with paragraphs 111-1-1 and 111-1-2 of SOCATA Service Bulletin No. 98/2, dated April 1976, or an FAA-approved equivalent.

  (b) If one or more cracks are detected as a result of any inspection required by paragraph (a) of this AD, repair as necessary in accordance with paragraph 111-1-3 of SOCATA Service Bulletin No. 98/2, dated April 1976, or an FAA-approved equivalent.

  (c) Within the next 100 hours time in service after the effective date of this AD, unless already accomplished, on airplanes with right angle engine mount brackets, modify the brackets in accordance with paragraph 111-2 of SOCATA Service Bulletin No. 98/2, dated April 1976, or an FAA-approved equivalent.

This amendment becomes effective August 22, 1977.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 7A14](https://openairdocs.org/tcds/7A14): Daher; names 6 of 13 models: Rallye 150 ST, MS 892A-150, MS 892E-150, MS 893E, MS 893A, Rallye 150 T

## 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: 15 (15 by airframe model, 0 by engine model)
- Makers: S.O.C.A.T.A. 12, Morane Saulnier 3

Models with the most aircraft:

- [S.O.C.A.T.A. RALLYE 150 ST](https://openairdocs.org/model/s-o-c-a-t-a-rallye-150-st): 10 aircraft (airframe model)
- [Morane Saulnier MS893A](https://openairdocs.org/model/morane-saulnier-ms893a): 2 aircraft (airframe model)
- [S.O.C.A.T.A. MS893E](https://openairdocs.org/model/s-o-c-a-t-a-ms893e): 2 aircraft (airframe model)
- [Morane Saulnier MS893E](https://openairdocs.org/model/morane-saulnier-ms893e): 1 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/77-15-06/models.md
Every aircraft: https://openairdocs.org/ad/77-15-06/aircraft.md

## Related documents

- [AD 2002-05-04](https://openairdocs.org/ad/2002-05-04) (historical): Engine Mount Assembly · SOCATA - Groupe Aerospatiale MS 892A-150, MS 892E-150, MS 893A and 5 more. Effective Apr 22, 2002. Supersedes this AD

Its text cites no advisory circulars or STCs.

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