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".