The Fairchild PT-19 is an American monoplane primary trainer aircraft that served with the US Army Air Forces, RAF and RCAF during World War II.
Fairchild PT-23
Cornell
During 1943, USAAF Training Command received a number of complaints about durability issues with the plywood wings of the PT-19 and the PT-23 when exposed to the high heat and/or humidity of training bases located in Texas and Florida. Maintenance officers at the overhaul depots were forced to order replacement of the wooden wing sections after only two to three months' active service because of wood rot and ply separation issues. Afterwards, the USAAF incorporated a demand for all-metal wing sections on all future fixed-wing training aircraft.