# AD 58-11-02: Landing Gear Drag Strut Yoke

- Type: Airworthiness directive
- Status: Current
- Products: Lockheed 18
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 2 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7133082D5AD5487E8625696F0047EABC.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/58-11-02

## The airworthiness directive

58-11-02 LOCKHEED: Applies to All Model 18 Aircraft.

Compliance required as indicated.

A number of reports has been received relative to cracks in the welds of the drag strut yoke (P/N XY450-2L-1) on the main landing gear. These cracks, as they progress, result in continuing reduction in the strength of the landing gear and hence render the landing gear unairworthy. It is, therefore, necessary to inspect the main landing gear for cracks in the area indicated as follows:

1. Not later than July 1, 1958, and at each 500 hours of operation thereafter inspect the main landing gear by means of dye penetrant, magnetic particle or equivalent.

2. At each 100 hours of operation conduct a visual inspection using an 8-power magnifying glass or equivalent.

In the event cracks are found, the oleo strut must be replaced.

If the oleo strut is replaced by a new part the above inspections need not be resumed until after 3,000 hours of service.

For the purpose of compliancewith this airworthiness directive, X-ray inspection is not considered an equivalent of dye penetrant or magnetic particle inspection.

This supersedes AD 58-07-02.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-723](https://openairdocs.org/tcds/A-723): Lockheed Martin Aeronautics Company; names 1 of 1 models: 18

## 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 (2 by airframe model, 0 by engine model)
- Makers: Lockheed 2

Models with the most aircraft:

- [Lockheed 18](https://openairdocs.org/model/lockheed-18): 2 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/58-11-02/models.md
Every aircraft: https://openairdocs.org/ad/58-11-02/aircraft.md

Its text cites no advisory circulars or STCs.

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