48-17-03: Planet Pinion Shafts Wear
FAA order 48-17-03 is an airworthiness directive. The FAA's subject line: Planet Pinion Shafts Wear. System: other and general.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Sikorsky Aircraft Corporation
- Models
- S-51
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 (630 characters)
48-17-03\tSIKORSKY: Applies to Model S-51 Helicopters. \n\nCompliance required at each 800-hour inspection. \n\nIn order to preclude any malfunctioning of the main rotor gearbox due to the normal wear which may be expected to occur in the primary and secondary planet pinion shafts (Sikorsky P/N S-535524), these parts should be rotated 180 degrees or replaced by new parts after 800 hours of operation. If rotated, replacement by new parts should be made after an additional 800 hours. \n\n(Sikorsky Aircraft Service Information Circular No. 8 Revision "B" dated January 13, 1948, covers this same subject.) \n\n\n\nAD 48-17-03
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/48-17-03.json · aircraft systems.