MD80 flight crew experiences a pressurization flow light during descent with wing and engine anti-ic...

Narrative:

While descending out of 17;000 ft the captain turned the airfoil and engine anti-ice on with the throttles at approximately 1.1 EPR. During the descent; the 'pressurization flow' light illuminated. He deployed the speed brake; so he could increase the power thus increasing the air flow. We leveled at 12;000 ft and the cabin continued to climb at a rate of 300-500 FPM. We verified the outflow valve was closed. The captain secured the anti-ice and the cabin rate slowed but did not stop. I pulled the QRH and completed all tasks and checklists for the 'pressurization flow' procedure. We requested and received a lower altitude of 7;000 ft. At this altitude the cabin fully depressurized and my sliding window became quite loud; but the captain and I could still communicate effectively. No emergency was declared because we were already below 10;000 ft. Shortly we were cleared for the visual and landed without incident.

Original NASA ASRS Text

Title: MD80 flight crew experiences a pressurization flow light during descent with wing and engine anti-ice on and the cabin altitude climbing. Attempts to restore sufficient flow are not successful and the cabin is completely depressurized at 7;000 FT.

Narrative: While descending out of 17;000 FT the Captain turned the airfoil and engine anti-ice on with the throttles at approximately 1.1 EPR. During the descent; the 'pressurization flow' light illuminated. He deployed the speed brake; so he could increase the power thus increasing the air flow. We leveled at 12;000 FT and the cabin continued to climb at a rate of 300-500 FPM. We verified the outflow valve was closed. The Captain secured the anti-ice and the cabin rate slowed but did not stop. I pulled the QRH and completed all tasks and checklists for the 'pressurization flow' procedure. We requested and received a lower altitude of 7;000 FT. At this altitude the cabin fully depressurized and my sliding window became quite loud; but the Captain and I could still communicate effectively. No emergency was declared because we were already below 10;000 FT. Shortly we were cleared for the visual and landed without incident.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1138075
Time
Date	201312
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Aircraft 1
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	Pneumatic System
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

MD80 flight crew experiences a pressurization flow light during descent with wing and engine anti-ice on and the cabin altitude climbing. Attempts to restore sufficient flow are not successful and the cabin is completely depressurized at 7;000 ft.