Airworthiness Directive · Amendment 39-9109 · Vickers-Armstrongs (Aircraft Limited) Airplanes
Vickers-Armstrongs (Aircraft Limited) Airplanes
This AD applies to Vickers-Armstrongs (Aircraft Limited) Viscount 744, Viscount 745D, Viscount 810.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD), applicable to all British Aerospace Model Viscount 744, 745D, and 810 series airplanes, that requires inspections to detect cracks in the chassis side bracing structure and in the chassis top strut support intercostals inside the wings, and replacement of discrepant parts with new parts. This proposal would also require inspection of the intercostals to determine the specification of the material, if necessary; and replacement of discrepant parts with new parts. This amendment is prompted by a report of cracking in the chassis top strut support intercostal in the side bracing structure inside the wing due to the effects of metal fatigue. The actions specified by this AD are intended to prevent such fatigue-related cracking, which could lead to the failure of the chassis side bracing structure inside the wings and consequent reduced structural integrity of the chassis support structure.
