58-17-03: Engine Cylinder
FAA order 58-17-03 is an airworthiness directive. The FAA's subject line: Engine Cylinder. It names Curtiss Wright C-46: about 8 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Airlift International, Inc.; Curtiss-Wright Corporation; Flying Tiger Line, Inc.; L. B. Smith Aircraft Corporation; Skyways International Trading and Transport Co.; Tempo Design Corporation
- Models
- C-46A, C-46D, C-46F, C-46R, C-46E, C-46A, C-46D, C-46E, C-46F, C-46A, C-46D, C-46F, C-46F, C-46/CW20-T, Super C-46/CW20-T
- On this site
- Curtiss Wright C-46 8 registered
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 (1,429 characters)
58-17-03 CURTISS-WRIGHT AND MARTIN: Applies to C-46 Series (including C- 46/CW20-T) and 202, 202A, 404 aircraft having propeller hydraulic feathering lines routed over or attached to engine cylinder assemblies.
Compliance recommended at the next engine overhaul but required by June 1, 1959.
Several cases of engine cylinder failures have occurred in which it was subsequently impossible to feather the propeller. In these cases, the feathering line which was routed over a front row cylinder was severed by a dislodged cylinder, thus preventing feathering and causing an additional fire hazard from oil being pumped over the engine. The record of cylinder failures from studs loosening or breaking indicates that the front row cylinders are mainly involved.
To prevent loss of feathering control from such failures, either of the following is required:
1. The propeller feathering line must be routed between cylinders. It must be supported in a manner avoiding attachment toa cylinder, and the line located at least three to four inches from the cylinder flanges.
2. The propeller feathering line must be routed between cylinders on the front row of cylinders in the manner described above. However, it will be acceptable for the line to be routed over a rear row cylinder provided it can be determined that sufficient flexibility is provided to prevent feathering line damage in the event of cylinder failure.
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/58-17-03.json · aircraft systems.