- Effective
- October 4, 1979
- Published
- October 1, 1979
- Issued
- September 19, 1979
- Models
- PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, PA-39
- Registered aircraft
- 3,192 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-3579
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.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 22 KB | 5262a1ec…3052014 | FAA DRS (API key needed) |
On this page
The airworthiness directive
79-20-10 PIPER: Amendment 39-3579. Applies to the following Piper Model airplanes:
PA-24 Serial Nos. 24-1 and up PA-24-250 Serial Nos. 24-1 and up PA-24-260 Serial Nos. 24-3642, 24-4000 and up PA-24-400 Serial Nos. 26-1 and up PA-30 Serial Nos. 30-1 and up PA-39 Serial Nos. 39-1 and up,
certificated in all categories except airplanes incorporating Piper Kit Part No. 763 893:
(a) Within the next 50 hours in service, after the effective date of this AD, unless already accomplished within the past 50 hours in service and at intervals not to exceed 100 hours in service thereafter, inspect in accordance with paragraph "Instructions" in Service Letter No. 850 dated April 18, 1979, Parts 1, 2, 3, 4a, b and c or equivalent inspection.
(b) Upon incorporation of Piper Kit No. 763 893 or equivalent, compliance with this AD may be terminated.
(c) Equivalent parts and inspections and alterations must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.
(d) Upon submittal of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection intervals specified in this AD.
This supersedes AD 74-10-03.
This amendment is effective October 4, 1979.
Affected TCDS · 2
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 3,192
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1954 | 1 |
|---|---|
| 1956 | 1 |
| 1957 | 7 |
| 1958 | 203 |
| 1959 | 345 |
| 1960 | 263 |
| 1961 | 216 |
| 1962 | 139 |
| 1963 | 193 |
| 1964 | 294 |
| 1965 | 253 |
| 1966 | 328 |
| 1967 | 150 |
| 1968 | 67 |
| 1969 | 167 |
| 1970 | 43 |
| 1971 | 46 |
| 1972 | 17 |
| 1978 | 1 |
| 1985 | 1 |
457 with no year recorded