- Effective
- September 30, 1966
- Models
- JT3C-12, JT3C-7
- Data sheet
- TCDSE-290
- Product
- Engine
- Amendment
- 39-279
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 | 129983f9…24fb589 | FAA DRS (API key needed) |
On this page
The airworthiness directive
66-21-01 PRATT & WHITNEY: Amdt. 39-279 Part 39 Federal Register August 31, 1966. Applies to Model JT3C-7 and JT3C-12 Turbojet Engines. Compliance required as indicated. Within the next 6,000 hours' time in service after the effective date of this AD or at the next compressor disassembly, whichever occurs first, unless already accomplished, replace the first, fifth and sixth stage compressor rotor disc spacer assemblies, P/N's 359410, 359414, and 359415, with spacer assemblies, P/N's 460599, 460604, and 460606, respectively. (Pratt & Whitney Aircraft Turbojet Engine Service Bulletin No. 689, Revision No. 3, dated November 16, 1964, pertains to this subject.) This directive effective September 30, 1966.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.