- Effective
- May 17, 1977
- Published
- May 16, 1977
- Issued
- May 3, 1977
- Model
- PA-31-325
- Data sheet
- TCDSA20SO
- Registered aircraft
- 137 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-2899
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 November 21, 2025.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
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|---|---|---|---|
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On this page
The airworthiness directive
77-10-09 PIPER: Amendment 39-2899. Applies to PA-31-325.
To prevent possible adverse airplane vibration effects at higher altitudes, accomplish the following within the next 25 hours in service after the effective date of this Airworthiness Directive unless already accomplished:
Attach the following operating limitation placard on the pilot's instrument panel between the clock and airspeed indicator in full view of the pilot: "Above 21,000 feet reduce Vno speed 3 m.p.h. per 1000 feet"
(Piper Service Bulletin No. 544 refers to this subject.)
This amendment becomes effective May 17, 1977.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 137
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1975 | 11 |
|---|---|
| 1976 | 22 |
| 1977 | 17 |
| 1978 | 22 |
| 1979 | 16 |
| 1980 | 16 |
| 1981 | 5 |
| 1982 | 3 |
| 1983 | 2 |
| 1984 | 1 |
22 with no year recorded