80-26-03: Magneto Drive Mechanism
FAA order 80-26-03 is an airworthiness directive in force since December 19, 1980. The FAA's subject line: Magneto Drive Mechanism. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Viking Air Limited
- Models
- DHC-4, DHC-4A
Dates and paperwork
- In force since
- December 19, 1980
- 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 (1,072 characters)
80-26-03 DEHAVILLAND: Amendment 39-3993. Applies to all DeHavilland DHC-4 and DHC-4A aircraft equipped with Pratt & Whitney Aircraft Twin Wasp D-5 and R-2000-7M2 engines incorporating left-hand magneto drive arrangement.
Compliance required within the next 1400 hours in service after the effective date of this AD unless already accomplished.
To preclude failure of the left hand magneto drive mechanism, incorporate the right-hand magneto drive and associated parts as described in Pratt & Whitney Aircraft Service Bulletin No. 1756 dated September 13, 1963, or approved equivalent instructions and parts.
The Twin Wasp D-5 and R-2000-7M2 engines so modified must be redesignated as noted in Section C of the Pratt & Whitney Aircraft Service Bulletin No. 1756, or an approved equivalent instruction.
All equipment instructions and parts must be approved by the Chief, Engineering & Manufacturing Branch, FAA Eastern Region.
(Pratt & Whitney Aircraft Service Bulletin No. 1756 pertains to this subject.)
This amendment is effective December 19, 1980.
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/80-26-03.json · aircraft systems.