The roof of a 19-year-old Boeing 737 tore off an Aloha Airlines flight at 24,000 feet on April 28, killing one person and injuring 61. The accident was blamed on cracks in the fuselage skin from repeated pressurization and depressurization of the cabin.
Methanol is in large supply, requires no pressurization and could be dispensed from service station pumps alongside those offering gasoline.
It was subjected to ground fatigue-testing through exposure to repeated pressurization cycles.