# AD 50-23-01: Shock Strut Fittings

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-15 and PA-17
- Published: December 6, 1950
- Issued: December 6, 1950
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 262 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A593382D4766A2158625698B00764197.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/50-23-01

## The airworthiness directive

50-23-01 PIPER: Applies to All Models PA-17 Aircraft and PA-15 Aircraft Equipped With PA-17 Type Landing Gear Shock Struts.

Compliance required by July 15, 1950.

Inspect landing gear shock strut end fittings, P/N 11806 (four per airplane) for cracks or other defects in the small bend radii. Replace fittings found to be defective. Excessive tightening of the attachment bolts may induce failure by restricting rotation of the fitting on the bolt, therefore, the end fittings should be installed free to rotate.

(Piper Service Letter No. 129, dated October 28, 1949, covers the same subject.)

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-800](https://openairdocs.org/tcds/A-800): Piper Aircraft Inc.; names 1 of 1 models: PA-15
- [TCDS A-805](https://openairdocs.org/tcds/A-805): Piper Aircraft Inc.; names 1 of 1 models: PA-17

## 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: 262 (262 by airframe model, 0 by engine model)
- Makers: Piper 262

Models with the most aircraft:

- [Piper PA-15](https://openairdocs.org/model/piper-pa-15): 165 aircraft (airframe model)
- [Piper PA-17](https://openairdocs.org/model/piper-pa-17): 97 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/50-23-01/models.md
Every aircraft: https://openairdocs.org/ad/50-23-01/aircraft.md

Its text cites no advisory circulars or STCs.

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