# AD 58-07-03: Inner Nacelle Bolts

- 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- Superseded by: Nothing supersedes this AD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/87ADDEBF47ADDDA98625699A006132FE.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/58-07-03

## The airworthiness directive

58-07-03 VICKERS: Applies to All Viscount 700 Series Aircraft.

Compliance required before accumulation of 6,000 flight hours.

Investigations have proved it is necessary to replace the 1/2-inch diameter bolts securing the top inboard attachment fittings of the inner nacelles to the leading edge member at Station 96 at 6,000 hours.

The P/N's of the bolts, which are to be replaced at 6,000 hours are as follows: 70103-4405 (Mod. D.1031 embodies); 80203-2405 (Mod. D.1327 or D.2025 embodied).

Vickers Mod. D.2581 introduces redesigned nuts and bolts as direct replacement for the above bolts. This design ensures that any bending moments present will be taken by the full shank diameter of the bolts. The modified bolt assemblies are split pinned.

Vickers-Armstrong has issued PTL 179, Issue 2, and Modification D.2581 covering this same subject. The British Air Registration Board considers this mandatory. The FAA concurs with this action and considers compliance therewith mandatory.

## 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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