# AD 60-04-03: Engine Mounts

- Type: Airworthiness directive
- Status: Current
- Products: Lockheed Martin 188A and 188C
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 4 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1C156FBF478DE0F6862569AE006FD610.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/60-04-03

## The airworthiness directive

60-04-03 LOCKHEED: Amdt. 100 Part 507 Federal Register February 9, 1960. Applies to All Model L-188 Airplanes Equipped With Lord Engine Mounts Number LM-204A-SA4.

Compliance required as indicated.

As a result of two incidents of front Lord engine mount fatigue failures on units of old design the following must be accomplished:

  (a) Inspect mounts for cracks particularly in the web and fillet areas upon next arrival at scheduled stop where maintenance facilities are available and repeat this inspection at intervals not to exceed 50 flight hours. Any mounts with cracks must be replaced immediately with LM- 204A-SA5/Lockheed P/N 632182-9.

  (b) Replace all LM-204A-SA4 mounts with LM-204A-SA5 mounts within 300 flight hours after first inspection required by (a) but not later than March 1, 1960.

  (c) All spare quick engine change units must be modified to include the new SA5 mounts prior to installation in aircraft.

(Lockheed Service Bulletin No. 228 covers thissame subject.)

This airworthiness directive sent by telegram to all operators of 188 aircraft on January 11, 1960.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4A22](https://openairdocs.org/tcds/4A22): Lockheed Martin Corporation; names 2 of 2 models: 188A, 188C

## 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: 4 (4 by airframe model, 0 by engine model)
- Makers: Lockheed 4

Models with the most aircraft:

- [Lockheed 188C](https://openairdocs.org/model/lockheed-188c): 3 aircraft (airframe model)
- [Lockheed 188A](https://openairdocs.org/model/lockheed-188a): 1 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/60-04-03/models.md
Every aircraft: https://openairdocs.org/ad/60-04-03/aircraft.md

Its text cites no advisory circulars or STCs.

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