- Effective
- April 29, 1976
- Published
- April 26, 1976
- Issued
- April 15, 1976
- Model
- PA-23-250 (Navy UO-1)
- Data sheet
- TCDS1A10
- Registered aircraft
- 899 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-2586
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 | 403b4010…405b989 | FAA DRS (API key needed) |
On this page
The airworthiness directive
72-21-07 PIPER AIRCRAFT CORP: Amendment 39-1540 as amended by Amendment 39-2586. Applies to PA23-250 airplanes, S/Ns 27-4575 to 27-4587 inclusive, 27-4589 to 27- 4620 inclusive, 27-4622 to 27-4672 inclusive, 27-4674 to 27-4682 inclusive, and 27-4684 to 27- 4694 inclusive, and PA-23-250 airplanes which have been altered by substitution of Piper P/N 32958-00, Section Assembly - Fuselage, Nose, 34552-00, Section Assembly - Fuselage, Nose, or 33346-05, Radome Assembly for Piper P/N 30517-00, Section Assembly - Fuselage, Nose, or 30517-06, Section Assembly - Fuselage, Nose, certificated in all categories.
Compliance required within 30 days after the effective date of this AD, unless already accomplished.
To improve the longitudinal stability characteristics and to prevent longitudinal stick force reversal during certain flight conditions, accomplish the alteration contained in Piper Service Bulletin No. 345, dated 7 Oct. 1971; or an equivalent method approved by the Chief,Engineering and Manufacturing Branch, FAA Eastern Region.
Upon request through a maintenance inspector, accompanied by substantiating data, the compliance time specified in the AD may be increased by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
Amendment 39-1540 was effective October 19, 1972.
This amendment 39-2586 is effective April 29, 1976.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 899
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1953 | 1 |
|---|---|
| 1960 | 33 |
| 1961 | 13 |
| 1962 | 21 |
| 1963 | 19 |
| 1964 | 25 |
| 1965 | 44 |
| 1966 | 59 |
| 1967 | 31 |
| 1968 | 39 |
| 1969 | 49 |
| 1970 | 19 |
| 1971 | 24 |
| 1972 | 27 |
| 1973 | 44 |
| 1974 | 49 |
| 1975 | 36 |
| 1976 | 52 |
| 1977 | 35 |
| 1978 | 36 |
| 1979 | 46 |
| 1980 | 11 |
| 1981 | 10 |
| 1995 | 1 |
175 with no year recorded