AD 98-12-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 744 | Airworthiness Directives; British Aerospace Model Viscount 744, 745, 745D, and 810 Series Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 745D | Airworthiness Directives; British Aerospace Model Viscount 744, 745, 745D, and 810 Series Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 810 | Airworthiness Directives; British Aerospace Model Viscount 744, 745, 745D, and 810 Series Airplanes |
Unsafe Condition
Cracking and corrosion of engine nacelle subframe structure components could result in reduced structural integrity, engine separation from the airframe, and reduced controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace struts before exceeding their life limits as specified in the applicable table of British Aerospace Viscount Alert PTL 500. Perform visual and eddy current inspections for cracking at intervals not to exceed 100 and 200 flight hours respectively. Inspect for cracking and corrosion of engine nacelle subframe components within 6 months of the AD effective date and repeat at intervals per the PTL tables. Replace components exceeding life limits.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 100 flight hours after the effective date of this AD or prior to the accumulation of the number of landings corresponding to a strut’s life limit, whichever occurs later. For inspections, within 100/200 flight hours after the effective date or prior to inspection threshold landings, whichever occurs later. Initial inspections under (d) must be done within 6 months after the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Model Viscount 744, 745D, and 810 series airplanes, certificated in any category.
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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