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Flight crew of a B737 declared an emergency and returned for landing after discovering that the aircraft was not pressurizing and subsequent checklist procedures could not activate the system to working order.
| Attributes | |
| ACN | 390395 |
| Time | |
| Date | 199801 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mci |
| State Reference | MO |
| Altitude | msl bound lower : 10000 msl bound upper : 10300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude other |
| Route In Use | enroute airway : zkc |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | other other : other pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 170 flight time total : 5000 flight time type : 330 |
| ASRS Report | 390395 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 130 flight time total : 6000 flight time type : 1400 |
| ASRS Report | 390394 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
During climb/departure from mci en route to sfo, as aircraft approached 10000 ft MSL, cabin altitude horn sounded. Crew confirmed cabin unpressurized and cabin altitude at 10000 ft MSL. Aircraft was leveled at 10300-10000 ft MSL, horn silenced. Captain used all checklists and procedures in order to restore pressurization. First officer maintained aircraft control and advised ZKC of situation. After all attempts by captain to correct problem were unproductive, captain advised crew of intentions to return to mci. Captain then advised ATC of intentions, declared emergency and assumed direct control of aircraft. Return and landing at mci uneventful and safe. ATC procedures and assistance excellent. Emergency caused no deviations from FARS or ATC procedures.
Original NASA ASRS Text
Title: FLC OF A B737 DECLARED AN EMER AND RETURNED FOR LNDG AFTER DISCOVERING THAT THE ACFT WAS NOT PRESSURIZING AND SUBSEQUENT CHKLIST PROCS COULD NOT ACTIVATE THE SYS TO WORKING ORDER.
Narrative: DURING CLB/DEP FROM MCI ENRTE TO SFO, AS ACFT APCHED 10000 FT MSL, CABIN ALT HORN SOUNDED. CREW CONFIRMED CABIN UNPRESSURIZED AND CABIN ALT AT 10000 FT MSL. ACFT WAS LEVELED AT 10300-10000 FT MSL, HORN SILENCED. CAPT USED ALL CHKLISTS AND PROCS IN ORDER TO RESTORE PRESSURIZATION. FO MAINTAINED ACFT CTL AND ADVISED ZKC OF SIT. AFTER ALL ATTEMPTS BY CAPT TO CORRECT PROB WERE UNPRODUCTIVE, CAPT ADVISED CREW OF INTENTIONS TO RETURN TO MCI. CAPT THEN ADVISED ATC OF INTENTIONS, DECLARED EMER AND ASSUMED DIRECT CTL OF ACFT. RETURN AND LNDG AT MCI UNEVENTFUL AND SAFE. ATC PROCS AND ASSISTANCE EXCELLENT. EMER CAUSED NO DEVS FROM FARS OR ATC PROCS.
Data retrieved from NASA's ASRS site as of July 2007 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.