Incidence of failure of cabin pressurisation in military aircraft, even in peace time, is higher than commercial aviation. The commonest cause of loss of pressurisation in military aviation, especially in fighter flying, is engine flameout.
October 2011 archive
On 10 Jun 1990, on BA flight 5390, Captain Tim Lancaster was sucked out halfway out of the aircraft, when an improperly installed windscreen pane failed. While the first officer made an emergency landing in Southampton, the cabin crew firmly held on to Tim, bringing him down safely [*].
It is not practical to maintain sea level conditions in flight. For example, a cabin differential pressure of 1 Kg/sq cm (nearly 1 ATA) generates more than 1,000 gm/cm2 pressure on the cabin wall and the transparency. If the cabin altitude of 2,500 m (8,000 ft) is accepted,the pressure differential would now be reduced by …
On 26 January 2011, a Qantas Boeing 737-400 made an emergency descent of about 8000m [*], when the aircraft lost cabin pressure after about 30 minutes of flight. This flight, with 99 passengers, from Adelaide to Melbourne had oxygen masks dropping in the cabin, causing a scare amongst its 99 passengers.