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Flight crew made an air conditioning bleeds off takeoff at sna for weight performance. At FL260 cabin altitude climbed above 10000'. Clearance obtained to descend to lower. Cabin air bleeds were opened and pressurization control was regained and cabin pressure became normal for completion of flight.
| Attributes | |
| ACN | 163493 |
| Time | |
| Date | 199011 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : vtu |
| State Reference | CA |
| Altitude | msl bound lower : 26000 msl bound upper : 26000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : jax |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other descent other |
| Route In Use | enroute airway : zla |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 240 flight time total : 14000 flight time type : 10000 |
| ASRS Report | 163493 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 220 flight time total : 8500 flight time type : 4500 |
| ASRS Report | 163561 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | faa : investigated Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Flight departed sna en route to sjc. Climb was normal until FL260. At that time we got the cabin altitude warning and noted that the cabin had climbed ot 10000'. We immediately asked ATC for a lower altitude and started to descend. During the descent we observed the engine air-conditioning bleeds had not been reinstated after a bleeds off takeoff from sna. We turned them on, the pressurization in the aircraft returned to normal and the flight continued to sjc west/O further incident. Callback conversation with reporter revealed the following information. During descent the oxy masks deployed but cabin pressure was quickly recovered and a cabin announcement made. We climbed back to altitude and proceeded normally.
Original NASA ASRS Text
Title: FLT CREW MADE AN AIR CONDITIONING BLEEDS OFF TKOF AT SNA FOR WEIGHT PERFORMANCE. AT FL260 CABIN ALT CLIMBED ABOVE 10000'. CLRNC OBTAINED TO DESCEND TO LOWER. CABIN AIR BLEEDS WERE OPENED AND PRESSURIZATION CTL WAS REGAINED AND CABIN PRESSURE BECAME NORMAL FOR COMPLETION OF FLT.
Narrative: FLT DEPARTED SNA ENRTE TO SJC. CLB WAS NORMAL UNTIL FL260. AT THAT TIME WE GOT THE CABIN ALT WARNING AND NOTED THAT THE CABIN HAD CLBED OT 10000'. WE IMMEDIATELY ASKED ATC FOR A LOWER ALT AND STARTED TO DSND. DURING THE DSNT WE OBSERVED THE ENG AIR-CONDITIONING BLEEDS HAD NOT BEEN REINSTATED AFTER A BLEEDS OFF TKOF FROM SNA. WE TURNED THEM ON, THE PRESSURIZATION IN THE ACFT RETURNED TO NORMAL AND THE FLT CONTINUED TO SJC W/O FURTHER INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO. DURING DSNT THE OXY MASKS DEPLOYED BUT CABIN PRESSURE WAS QUICKLY RECOVERED AND A CABIN ANNOUNCEMENT MADE. WE CLBED BACK TO ALT AND PROCEEDED NORMALLY.
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.