MD-83
Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 15600
Time Pressure; Training / Qualification
Aircraft Equipment Problem Critical
Flight Crew Took Evasive Action; Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport; Flight Crew FLC complied w / Automation / Advisory; General Maintenance Action; General Declared Emergency
Aircraft
Departing VMC all checks were normal; but climbing through 25;000 feet the pressure flow light illuminated. The Captain stated the cabin was at 8;000 feet and climbing 1;000 FPM and directed me to initiate an emergency descent to 10;000 feet. The Captain declared an emergency with ATC and coordinated a vector to return to the departure airport. The Captain read the QRH procedure and we accomplished the procedure. We were able to prevent the cabin altitude from climbing to 10;000 feet and the oxygen masks did not automatically deploy. The Captain informed the flight attendants what was happening; gave them their TEST briefing; and informed the passengers we were returning.  We landed overweight with a normal touchdown.  After landing; we coordinated with Airfield Rescue and Fire Fighters; ATC; Operations; and Ramp Tower to return to a Gate.  The brake temps remained within normal range.  After arrival; we debriefed with Maintenance. The Captain filled out the Maintenance Log for the pressurization problem and overweight landing; and then coordinated with Dispatch and crew tracking.
[This report contains no additional information.]
At FL250 and climbing; a MD-83 pressure flow light illuminated with the cabin climbing 1;000 FPM at 8;000 feet; so an emergency was declared; a descent started; and the QRH completed followed by an uneventful landing at the departure airport.