The first officer of a B737-700 reported that while descending the cabin pressure began descending a...

Narrative:

On arrival into ZZZ at FL360; near zzzzz intersection. Began early descent due to turbulence (1000 fpm). Automatic fail illuminates. Cabin rate indicator descends at 2-4000 fpm; when aircraft is actually descending 1000 fpm. Per pre-flight brief on MEL; we switch to man mode and close outflow valve. I feel lightheaded; so we don masks and establish communications. Captain (ca) begins auto fail checklist; I continue to fly plane. Controller still reading rapid descent and plane is over pressurizing. When I open valve a small amount; cabin rate goes up to +2500 fpm. Assumption is cabin is uncontrollable. Captain requests descent. We get descend to 8000 ft. Complete autofail//emergency descent checklists. Once below 10;000 ft; ca speaks with flight attendants (flight attendant) and makes PA to passengers. ATC clears us direct to FAF for ILS [approach]. On final approach; ca directs me to open outflow valve. We land and taxi to gate without further incident.

Original NASA ASRS Text

Title: The First Officer of a B737-700 reported that while descending the cabin pressure began descending at a greater rate and began to over pressurize the aircraft.

Narrative: On Arrival into ZZZ at FL360; near ZZZZZ Intersection. Began early descent due to turbulence (1000 fpm). AUTO FAIL Illuminates. Cabin rate indicator descends at 2-4000 fpm; when aircraft is actually descending 1000 fpm. Per pre-flight brief on MEL; we switch to MAN mode and close outflow valve. I feel lightheaded; so we don masks and establish communications. Captain (CA) begins Auto Fail checklist; I continue to fly plane. Controller still reading rapid descent and plane is over pressurizing. When I open valve a small amount; cabin rate goes up to +2500 fpm. Assumption is Cabin is uncontrollable. Captain requests descent. We get descend to 8000 ft. Complete AUTOFAIL//Emergency Descent checklists. Once below 10;000 ft; CA speaks with Flight Attendants (FA) and makes PA to passengers. ATC clears us direct to FAF for ILS [approach]. On final approach; CA directs me to open outflow valve. We land and taxi to gate without further incident.

Data retrieved from NASA's ASRS site 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	1409312
Time
Date	201612
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	Pressurization Control System
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Other / Unknown
Events
Anomaly	Aircraft Equipment Problem Less Severe

The first officer of a B737-700 reported that while descending the cabin pressure began descending at a greater rate and began to over pressurize the aircraft.