Boeing B737 Loss Of Pressurization

Whilst in the cruise the crew began to feel some discomfort in their ears. This was shortly followed by cabin altitude warning horn which indicated that the cabin altitude had exceeded 10,000 feet and this was seen to continue to climb on the cockpit gauge. At the same time, the primary AUTO mode of the pressure control failed, shortly followed by the secondary STBY mode. The crew selected the first manual pressure control mode, but were unable to control the cabin altitude. An emergency descent and subsequent diversion was carried out.

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