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B767 dispatched with 1 air conditioning pack returns to departure station when cabin pressurization could not be maintained.
| Attributes | |
| ACN | 567015 |
| Time | |
| Date | 200211 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| State Reference | CA |
| Altitude | msl single value : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight attendant : on duty |
| Qualification | flight attendant : currently qualified flight attendant aircraft qualified on : 4 |
| Experience | flight attendant time airline total : 10 flight attendant time total : 10 flight attendant time type : 90 |
| ASRS Report | 567015 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance |
| Independent Detector | aircraft equipment other aircraft equipment : cab alt warning other flight crewa other other : cab 1 |
| Resolutory Action | flight crew : diverted to another airport flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Aircraft |
Narrative:
Air conditioning was not working properly. Cabin temperature was 98 degrees. Maintenance tried to fix problem. Said aircraft was ok to go -- just use left air conditioning pack. Maintenance said problem should fix itself once we were in the air and airplane reached cruising altitude. After takeoff, the captain told us (flight crew) to remain seated, they were trying to fix a problem. Aircraft altitude was FL290 (reading), but actual cabin pressure was 9000 ft. All of the flight attendants were feeling light headed, nauseated and having difficulty breathing. I was not sure what was happening. Once on the ground, captain said they declared an emergency because a horn in the cockpit went off at 8500 ft and they donned their oxygen masks. They never dropped the oxygen masks in the back -- although 2 flight attendants donned masks on their own. The problem was never fixed and they (maintenance) took the aircraft OTS.
Original NASA ASRS Text
Title: B767 DISPATCHED WITH 1 AIR CONDITIONING PACK RETURNS TO DEP STATION WHEN CABIN PRESSURIZATION COULD NOT BE MAINTAINED.
Narrative: AIR CONDITIONING WAS NOT WORKING PROPERLY. CABIN TEMP WAS 98 DEGS. MAINT TRIED TO FIX PROB. SAID ACFT WAS OK TO GO -- JUST USE L AIR CONDITIONING PACK. MAINT SAID PROB SHOULD FIX ITSELF ONCE WE WERE IN THE AIR AND AIRPLANE REACHED CRUISING ALT. AFTER TKOF, THE CAPT TOLD US (FLC) TO REMAIN SEATED, THEY WERE TRYING TO FIX A PROB. ACFT ALT WAS FL290 (READING), BUT ACTUAL CABIN PRESSURE WAS 9000 FT. ALL OF THE FLT ATTENDANTS WERE FEELING LIGHT HEADED, NAUSEATED AND HAVING DIFFICULTY BREATHING. I WAS NOT SURE WHAT WAS HAPPENING. ONCE ON THE GND, CAPT SAID THEY DECLARED AN EMER BECAUSE A HORN IN THE COCKPIT WENT OFF AT 8500 FT AND THEY DONNED THEIR OXYGEN MASKS. THEY NEVER DROPPED THE OXYGEN MASKS IN THE BACK -- ALTHOUGH 2 FLT ATTENDANTS DONNED MASKS ON THEIR OWN. THE PROB WAS NEVER FIXED AND THEY (MAINT) TOOK THE ACFT OTS.
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.