54-15-01: Control Cable Turnbuckle Threads
FAA order 54-15-01 is an airworthiness directive. The FAA's subject line: Control Cable Turnbuckle Threads. It names Dehavilland DHC-2: about 255 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: flight controls.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Viking Air Limited
- Models
- DHC-2 Mk.I, DHC-2 Mk.II, DHC-2 Mk.III
- On this site
- Dehavilland DHC-2 255 registered
Dates and paperwork
- 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 (1,071 characters)
54-15-01 de HAVILLAND: Applies to All Model DHC-2 (Beaver) Aircraft, Serial Numbers 1 to 680 Inclusive.
Compliance required by August 30, 1954.
Inspect all rudder, elevator and aileron control cable terminals for damaged threads at the turnbuckle.
Most reported defects have concerned the right-hand threads on turnbuckle terminals but all threaded terminals at turnbuckles should be inspected at the following locations:
Control Cable Circuit
Location
Number of turn-Buckles
1. Base of control column.
2
Ailerons
2. Outboard wing inspection panels.
4
Elevators
3. Hatch on underside of rear fuselage.
2
Rudder
4. Rear fuselage interior.
2
Damaged or defective cables must be replaced.
If any evidence of defects is found, de Havilland will supply replacement cables.
The FAA concurs in this mandatory action by the Canadian Department of Transport.
(de Havilland Technical News Sheet Series B, No. 76 dated June 23, 1954, available from de Havilland Aircraft of Canada, Limited, Postal Station "L," Toronto, Canada, covers this same subject.)
Related safety bulletins advice on the same designs, not orders
2018-11-21SW-18-31 · NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM
2005-11-18CE-06-10 ·
2003-05-14CE-03-36 ·
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/54-15-01.json · aircraft systems.