- Models
- 501-D13, 501-D13A
- 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 | 8c408e33…944411b | FAA DRS (API key needed) |
On this page
The airworthiness directive
59-13-01 ALLISON: Applies to Models 501-D13 and -D13A Engines.
Compliance required as indicated.
Seven recent cases of spalling of the propeller shaft roller bearing on Allison 501-D13 engines necessitates a continuity check using a probe be made of the reduction gear magnetic plug at least every 10 hours on engine installations not modified in accordance with Allison Commercial Engine Bulletin 72-74 and Lockheed Bulletin SB 262. This check is necessary due to high bearing loads caused by propeller during certain aircraft flight conditions. If metal chips are found as described in Allison Maintenance Manual, section 72-0, paragraph 8B, page 219, remove gearbox.
This supersedes AD 59-11-01.
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 |