Dash 8-200
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
Flight Crew Overcame Equipment Problem
Aircraft
The First Officer performed the cruise checklist when directed to. He noticed the differential pressure to be about 5.5 PSI and the cabin altitude climbing past 10;000 FT at FL240. With no master warning or warning light we descended to FL200. The differential pressure lowered and the cabin altitude read below 8;000 FT.
DHC8-100 Captain experiences a high cabin altitude at FL240 with no associated cabin altitude warning. Flight descends to FL200 and cabin altitude descends below 8;000 FT.