- Effective
- December 2, 1963
- Model
- P.166
- Data sheet
- TCDS7A4
- Product
- Aircraft · Small airplane
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
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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 TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.