# AD 54-15-01: Control Cable Turnbuckle Threads

- Type: Airworthiness directive
- Status: Current
- Products: Viking Air DHC-2 Mk.I, DHC-2 Mk.II and DHC-2 Mk.III
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 140 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/708A10FE9AF767B086256A34006B8D02.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/54-15-01

## The airworthiness directive

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.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-806](https://openairdocs.org/tcds/A-806): De Havilland Aircraft of Canada Limited; names 3 of 3 models: DHC-2 Mk.II, DHC-2 Mk.III, DHC-2 Mk.I

## 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: 140 (140 by airframe model, 0 by engine model)
- Makers: Dehavilland 135, Dehavilland Acft Of Canada 3, Dehavilland-Shawano 2

Models with the most aircraft:

- [Dehavilland DHC-2 MK. I(L20A)](https://openairdocs.org/model/dehavilland-dhc-2-mk-i-l20a): 91 aircraft (airframe model)
- [Dehavilland DHC 2 MK III](https://openairdocs.org/model/dehavilland-dhc-2-mk-iii): 24 aircraft (airframe model)
- [Dehavilland DHC-2 MK.I](https://openairdocs.org/model/dehavilland-dhc-2-mk-i): 20 aircraft (airframe model)
- [Dehavilland Acft Of Canada DHC-2 MK I](https://openairdocs.org/model/dehavilland-acft-of-canada-dhc-2-mk-i): 3 aircraft (airframe model)
- [Dehavilland-Shawano DHC-2 MK.I](https://openairdocs.org/model/dehavilland-shawano-dhc-2-mk-i): 2 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/54-15-01/models.md
Every aircraft: https://openairdocs.org/ad/54-15-01/aircraft.md

Its text cites no advisory circulars or STCs.

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