- Effective
- November 9, 1960
- Models
- 501-D13, 501-D13A, 501-D13D, 501-D13E, 501-D13H
- Data sheet
- TCDSE-282
- Registered aircraft
- 9 matched by model
- Product
- Engine
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 | 80f04da1…c598007 | FAA DRS (API key needed) |
On this page
The airworthiness directive
60-21-01 ALLISON: Amdt. 208 Part 507 Federal Register October 8, 1960. Applies to All Model 501-D13 Series Engines.
Compliance required at next overhaul of engine, power section or torquemeter, whichever occurs first, after the effective date of this AD.
Several cases of rubbing of the torquemeter housing by the torquemeter reference shaft have resulted in complete separation of the housing into two sections. To preclude such failures, a mid-bearing torquemeter assembly, P/N 6823900, identified by a 1/2-inch by 2 1/2-inch blue stripe on the forward bevel of the housing shall be installed. (Allison Commercial Engine Bulletin No. 72-113 covers the same subject.)
This directive effective November 9, 1960.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 9
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1953 | 2 |
|---|---|
| 1955 | 1 |
| 1956 | 3 |
| 1959 | 2 |
| 1960 | 1 |