AD 59-05-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 745D | Airworthiness Directives; VICKERS Model 745D |
Unsafe Condition
Failure of the PB.10 Automatic Pilot Control Relay may prevent pilots from positively disengaging the trim servo clutch using the emergency cutoff buttons or mechanical disconnect lever.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a control relay (Plessey P/N 7LZ.107352 or P/N 7CZ.97508/1) in the A.C. junction box to ensure pilots can disengage the trim servo clutch via emergency cutoff buttons or mechanical disconnect lever.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
as soon as possible but not later than December 1, 1959
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Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Viscount Model 745D with PB.10 Automatic Pilot installed
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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