- Effective
- November 30, 1971
- Published
- November 25, 1971
- Issued
- November 16, 1971
- Models
- PA-23-250 (Navy UO-1), PA-30, PA-31, PA-31-300
- Registered aircraft
- 1,806 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-1344
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 | 21 KB | 4cff4a26…cd4809a | FAA DRS (API key needed) |
On this page
The airworthiness directive
70-22-05 PIPER: Amdt. 39-1099 as amended by Amendment 39-1344. Applies to Piper PA 23-250 type Aircraft S/N 27-3837 and 27-3944 to 27-4442 incl.; PA-30, S/Nos. 30-1717, 30-1746 to 30-2000, Incl.; PA-31 and PA-31-300, S/Nos. 31-228, 31-230, 31-231, 31-233 to 31- 588. Certificated for Instrument Flight.
Compliance required within the next 100 hours in service after the effective date of this AD, unless already accomplished.
To prevent the hazards associated with the possibility of a complete loss of electrical power while operating under Instrument Flight Rules. Accomplish the following:
(a) Modify the aircraft electrical system in accordance with Piper Service Bulletin No. 306 dated January 9, 1970 or equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
Upon request with substantiating data submitted through an FAA maintenance inspector, the compliance time specified in this AD may be increased by the Chief, Engineering & Manufacturing Branch, FAA Eastern Region.
Amendment 39-1099 was effective November 4, 1970.
This Amendment 39-1344 is effective November 30, 1971.
Affected TCDS · 3
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1,806
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1953 | 1 |
|---|---|
| 1957 | 1 |
| 1960 | 33 |
| 1961 | 13 |
| 1962 | 21 |
| 1963 | 101 |
| 1964 | 183 |
| 1965 | 145 |
| 1966 | 231 |
| 1967 | 134 |
| 1968 | 81 |
| 1969 | 152 |
| 1970 | 22 |
| 1971 | 25 |
| 1972 | 28 |
| 1973 | 46 |
| 1974 | 50 |
| 1975 | 36 |
| 1976 | 52 |
| 1977 | 37 |
| 1978 | 41 |
| 1979 | 46 |
| 1980 | 11 |
| 1981 | 10 |
| 1995 | 1 |
305 with no year recorded