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FAA
Federal Aviation Administration Department of Transportation
Aviation Safety
AIRWORTHINESS DIRECTIVE
Generated by Aircraft-logs.com — March 21, 2026

AD 56-26-04 ACTIVE

Nacelle Side Brackets
Key Information
AD Number 56-26-04 Status Active
Effective Date Not specified Issue Date Not specified
Docket Number Unknown Amendment N/A
Product Type ["Aircraft"] Product Subtype ["Large Airplane"]
CFR Part --- - Part 39 CFR Section N/A
Citation This information is not available.
Applicability
Manufacturer(s) Vickers-Armstrongs (Aircraft Limited)
Model(s) Viscount 745D
Regulatory Text

56-26-04 VICKERS-ARMSTRONG: Applies to All Viscount Model 745D Aircraft.

Compliance required as indicated.

Service experience has indicated that cracks may develop in certain pre-Modification D.1031 engine nacelle attachment brackets. Accordingly, Vickers-Armstrong (Aircraft) Ltd. issued Preliminary Technical Leaflet No. 111, Issue 1, dated October 19, 1956, covering this subject. The British Air Registration Board considers the inspections recommended therein mandatory, in which the FAA concurs. When brackets to Mod. D.1031 are installed, the special inspections detailed in PTL No. 111 do not apply.

This supersedes AD 55-22-05.

AD 56-26-04 — Nacelle Side Brackets
Printed from Aircraft-logs.com — 03/21/2026