55-22-04: Tailplane Main Spar
FAA order 55-22-04 is an airworthiness directive. The FAA's subject line: Tailplane Main Spar. System: airframe structure.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Vickers-Armstrongs (Aircraft Limited)
- Models
- Viscount 745D
Dates and paperwork
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (636 characters)
55-22-04 VICKERS-ARMSTRONG: Applies to All Viscount Model 745D Aircraft.
Compliance required as indicated.
Cracks have been found in the tailplane center section main spar extending along the lines of rivets attaching the web plate.
Accordingly, Vickers-Armstrong (Aircraft) Ltd. issued Preliminary Technical Leaflet No. 52 dated August 19, 1955, covering this subject. The British Air Registration Board considers Modification D.1384, the initial and repetitive inspections recommended therein mandatory in which the FAA concurs.
Aircraft complying with the limitations specified in PTL No. 52 will be considered serviceable.
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/55-22-04.json · aircraft systems.