# AD 59-13-01: Propeller Shaft Roller Bearing

- Type: Airworthiness directive
- Status: Current
- Products: Rolls-Royce 501-D13 and 501-D13A
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Registered aircraft: 9 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/68993D61C87403A186256854006D7A9E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/59-13-01

## 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 data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E-282](https://openairdocs.org/tcds/E-282): Rolls-Royce Corporation; names 2 of 9 models: 501-D13, 501-D13A

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 9 (0 by airframe model, 9 by engine model)
- Makers: Convair 6, Lockheed 3

Models with the most aircraft:

- [Allison 501-D13 series](https://openairdocs.org/engine/allison-501-d13-series): 9 aircraft (engine model)

All 1 models: https://openairdocs.org/ad/59-13-01/models.md
Every aircraft: https://openairdocs.org/ad/59-13-01/aircraft.md

Its text cites no advisory circulars or STCs.

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