- Effective
- May 12, 1964
- Published
- May 12, 1964
- Issued
- May 5, 1964
- Model
- PA-24-250
- Data sheet
- TCDS1A15
- Registered aircraft
- 1,222 matched by model
- 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 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 | 19 KB | d8c358f8…4344390 | FAA DRS (API key needed) |
On this page
The airworthiness directive
64-10-04 PIPER: Amdt. 728 Part 507 Federal Register May 12, 1964. Applies to Model PA-24-250 Aircraft, Compliance required within 50 hours' time in service after the effective date of this AD.
In order to prevent portions of the carburetor air box deflector vanes from breaking loose and lodging within the carburetor throat, remove the deflector vanes from the air box, P/N 21943- 03, in accordance with Piper Service Letter No. 420. Upon removal of these vanes, the air box P/N becomes 21943-05.
(Piper Service Letter No. 420 dated March 5, 1964, covers this subject.)
This directive effective May 12, 1964.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1,222
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1954 | 1 |
|---|---|
| 1957 | 1 |
| 1958 | 147 |
| 1959 | 269 |
| 1960 | 188 |
| 1961 | 172 |
| 1962 | 123 |
| 1963 | 97 |
| 1964 | 40 |
| 1968 | 1 |
| 1969 | 1 |
182 with no year recorded