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A B737-300 flight crew experienced cabin pressure controller malfunction resulting in increasing cabin altitude. Following a precautionary descent; control of cabin pressure was regained with the standby system; and flight continued to destination.
| Attributes | |
| ACN | 930660 |
| Time | |
| Date | 201102 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pressurization Control System |
| Person 1 | |
| Function | First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Cabin altitude horn [sounded] at 28;000 ft. [We] performed memory items [and the] captain assumed control. Completed QRH [and] got a descent from ATC to 14;000 ft. On the descent [we] got control of pressurization [and] cabin altitude stared to descend using standby mode. [We] advised ATC we had control of the cabin and further descent was not required. Leveled off at 14;000 ft and continued flight. Auto pressurization failed to maintain cabin pressure.
Original NASA ASRS Text
Title: A B737-300 flight crew experienced cabin pressure controller malfunction resulting in increasing cabin altitude. Following a precautionary descent; control of cabin pressure was regained with the standby system; and flight continued to destination.
Narrative: Cabin altitude horn [sounded] at 28;000 FT. [We] performed memory items [and the] Captain assumed control. Completed QRH [and] got a descent from ATC to 14;000 FT. On the descent [we] got control of pressurization [and] cabin altitude stared to descend using standby mode. [We] advised ATC we had control of the cabin and further descent was not required. Leveled off at 14;000 FT and continued flight. Auto pressurization failed to maintain cabin pressure.
Data retrieved from NASA's ASRS site as of April 2012 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.