60-21-01: Torquemeter Housing
FAA order 60-21-01 is an airworthiness directive in force since November 9, 1960. The FAA's subject line: Torquemeter Housing. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Engine
- Makes
- Rolls-Royce Corporation
- Models
- 501-D13, 501-D13A, 501-D13D, 501-D13E, 501-D13H
Dates and paperwork
- In force since
- November 9, 1960
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (724 characters)
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.
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/60-21-01.json · aircraft systems.