# AD 63-22-04: Main Landing Gear Shock Absorber

- Type: Airworthiness directive
- Status: Current
- Products: Industrie Aeronautiche e Meccaniche P.166
- Effective: December 2, 1963
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F0F4457079B4FE8C86256A380060D4BE.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/63-22-04

## The airworthiness directive

63-22-04 PIAGGIO: Amdt. 635 Part 507 Federal Register October 30, 1963. Applies to All Model P.166 Aircraft.

Compliance required within 50 hours' time in service after the effective date of this AD.

As a result of failures of the main landing gear shock absorber the following modifications must be accomplished in the manner specified in Piaggio Service Bulletin 166- 25A.

  (a) Install Teflon sealing gasket P/N 4/22015.52 on inner ring nut of shock absorber casing.

  (b) Replace light alloy piston bottom with steel P/N 4/22015.55.

  (c) Replace the present ring nut with P/N 4/22015.56.

  (d) Shock absorbers modified as specified herein shall have a letter "D" placed on the nameplate.

  (e) Shock absorbers modified as specified herein shall be overhauled every 1,200 hours' time in service or every 2 years, whichever occurs first.

This directive effective December 2, 1963

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 7A4](https://openairdocs.org/tcds/7A4): Industrie Aeronautiche e Meccaniche; names 1 of 4 models: P.166

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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