# AD 58-18-03: Flap Chain Tensioner Locking

- Type: Airworthiness directive
- Status: Current
- Products: Vickers-Armstrongs Viscount 744 and Viscount 745D
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3ADB22FB15A204EC8625699A0064514D.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/58-18-03

## The airworthiness directive

58-18-03 VICKERS: Applies to All Viscount 700 Series Aircraft.

Compliance required by November 1, 1958.

Following a recent case of damage to Nos. 1 and 2 flaps, beams and telescopic rods caused by a flap chain tensioner barrel becoming completely unscrewed on No. 1 flap chain, Vickers-Armstrongs recommends the wirelocking of flap chain tensioners on Nos. 1, 2 and 3 flaps.

The British Air registration Board considers this mandatory. The FAA concurs with this action and considers compliance therewith mandatory.

(Vickers-Armstrongs Modification D.2554 covers this subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-814](https://openairdocs.org/tcds/A-814): Vickers-Armstrongs (Aircraft Limited); names 2 of 3 models: Viscount 744, Viscount 745D

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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