51-28-03: Fuel Valve Placard
FAA order 51-28-03 is an airworthiness directive. The FAA's subject line: Fuel Valve Placard. It names Ryan Aeronautical ST3: about 116 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
- Ryan Aeronautical Company
- Models
- ST-3KR
- On this site
- Ryan Aeronautical ST3 116 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 (622 characters)
51-28-03 RYAN: Applies to All Model ST-3KR (Military PT-22) Aircraft.
To be accomplished by February 1, 1952, or next 100-hour inspection, whichever is first.
The fuel selector valve handles for these aircraft are usually placarded "Always take off with fuel feeding from Reserve". However, there have been fatal accidents which resulted from failure to observe this procedure, or from failure to return to the Reserve position when landing with a low fuel supply. Therefore, the following placard must be installed, or the existing placard revised to read: "Always take off and land with fuel feeding from RESERVE".
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 October 5, 2026. Connections as data: /graph/directive/51-28-03.json · aircraft systems.