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An A300 crew experiences loss of cabin pressurization control during climb at FL260. Avionics overboard valve was determined to be the problem by maintenance after landing.
| Attributes | |
| ACN | 636016 |
| Time | |
| Date | 200411 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl bound lower : 6000 msl bound upper : 26000 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 636016 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 636014 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : ecam other flight crewa other flight crewb |
| Resolutory Action | flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Normal flight until climb out through FL260. An ECAM message and warning for cabin altitude pressure page displayed cabin altitude approximately 10100 ft. Cabin was climbing at 1000 FPM, both outflow valve showed full closed. Overboard valve showed amber XXX. I declared an emergency, followed ECAM checklist, started a rapid descent to 6000 ft. Made a PA during descent, advising passenger of problems, normal flight after descent through landing. After gate arrival maintenance advised that overboard valve was full open. MEL item avionics cooling overboard valve placarded inoperative.
Original NASA ASRS Text
Title: AN A300 CREW EXPERIENCES LOSS OF CABIN PRESSURIZATION CTL DURING CLB AT FL260. AVIONICS OVERBOARD VALVE WAS DETERMINED TO BE THE PROB BY MAINT AFTER LNDG.
Narrative: NORMAL FLT UNTIL CLBOUT THROUGH FL260. AN ECAM MESSAGE AND WARNING FOR CABIN ALT PRESSURE PAGE DISPLAYED CABIN ALT APPROX 10100 FT. CABIN WAS CLBING AT 1000 FPM, BOTH OUTFLOW VALVE SHOWED FULL CLOSED. OVERBOARD VALVE SHOWED AMBER XXX. I DECLARED AN EMER, FOLLOWED ECAM CHKLIST, STARTED A RAPID DSCNT TO 6000 FT. MADE A PA DURING DSCNT, ADVISING PAX OF PROBS, NORMAL FLT AFTER DSCNT THROUGH LNDG. AFTER GATE ARR MAINT ADVISED THAT OVERBOARD VALVE WAS FULL OPEN. MEL ITEM AVIONICS COOLING OVERBOARD VALVE PLACARDED INOP.
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.