The Boeing 737 family uses a system that is pressurized by bleed air supplied to the packs and controlled by outflow valves. The Boeing 737 technical website has valuable information about the ...

A Boeing Co. 737 cargo plane operated by a Qantas Airways Ltd. subsidiary suddenly depressurized during a flight last year after a misplaced insulation blanket clogged up the main outflow valve ...

Indonesia’s safety investigators are probing a pressurisation system problem onboard a Lion Air Boeing 737-900ER that resulted in the aircraft having to make a diversion during a routine ...

An outflow valve stuck wide open was cited as a possible cause of the depressurization of a Lear jet that killed golfer Payne Stewart in 1999.