- Effective
- July 9, 1966
- Models
- Military R-985 Series, Wasp Jr. A, Wasp Jr. B-4, Wasp Jr. B-5, Wasp Jr. SB, Wasp Jr. SB-2 and 7 more
- Data sheets
- TCDSE-123TCDSTC 85TCDSATC 392 more
- Product
- Engine
- Amendment
- 39-247
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 May 30, 2024.
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 | 3985f7c8…2079242 | FAA DRS (API key needed) |
On this page
The airworthiness directive
66-14-04 PRATT & WHITNEY: Amdt. 39-247 Part 39 Federal Register June 8, 1966. Applies to Pratt & Whitney Aircraft Wasp Jr. and R-985 Series Engines. Compliance required at the next engine overhaul after the effective date of this AD unless already accomplished. To prevent failure of the cam reduction drive gear assembly and resultant loss of engine power, replace cam reduction drive gear assembly, P/N 3965, with cam reduction drive gear, P/N 331098. (Pratt & Whitney Aircraft Service Bulletin No. 1671, Supplement No. 1, Revision A, revised November 24, 1959, pertains to this subject.) This supersedes AD 62-11-05. This directive effective July 9, 1966.
Affected TCDS · 5
The type certificate data sheets for the models this AD names, matched by model and maker.