# AD 57-08-06: Horizontal Stabilizer

- 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- Superseded by: Nothing supersedes this AD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/75FA8AD85907553F8625699A005F3AA1.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/57-08-06

## The airworthiness directive

57-08-06 VICKERS: Applies to Viscount 744 and 745 Type Aircraft.

Compliance required as indicated.

In view of a recent horizontal stabilizer buckling incident compliance with the following is required:

1. Effective immediately the following placard must be installed in full view of the pilot: "TURBULENT AIR PENETRATION-165-KNOTS-FLAPS UP-LANDING GEAR UP." (This placard required regardless of compliance with item 2.)

2. Compliance required by August 31, 1957, with Vickers Modification D.1906. This modification introduces new horizontal stabilizer skin panels of 18 gage, Specification L.73 material between Stations 34.36 and 99.13 in lieu of the 20-gage panels of Specification L.72.

## 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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