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A DC9 while climbing to FL340 had a cabin altitude warning. Crew executed emergency descent. Cabin pressure 14000 ft. Cabin masks deployed.
| Attributes | |
| ACN | 665247 |
| Time | |
| Date | 200507 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 34000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Turbulence Thunderstorm |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 70 flight time total : 14500 flight time type : 9000 |
| ASRS Report | 665247 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : cabin altitude indication other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Experienced slow decompression while climbing to FL340. Anti-ice was on. When turned off; cabin kept climbing with resultant master warning 'cabin pressurization (approximately 10000 ft). We donned oxygen masks and executed a rapid (emergency) descent. Cabin reached 14500 ft and passenger oxygen masks deployed. Working our procedures; we were able to gain control of cabin at FL180 and from there proceeded to ZZZ1; as other airports would have required extensive thunderstorm deviation to get to.
Original NASA ASRS Text
Title: A DC9 WHILE CLBING TO FL340 HAD A CABIN ALT WARNING. CREW EXECUTED EMER DSCNT. CABIN PRESSURE 14000 FT. CABIN MASKS DEPLOYED.
Narrative: EXPERIENCED SLOW DECOMPRESSION WHILE CLBING TO FL340. ANTI-ICE WAS ON. WHEN TURNED OFF; CABIN KEPT CLBING WITH RESULTANT MASTER WARNING 'CABIN PRESSURIZATION (APPROX 10000 FT). WE DONNED OXYGEN MASKS AND EXECUTED A RAPID (EMER) DSCNT. CABIN REACHED 14500 FT AND PAX OXYGEN MASKS DEPLOYED. WORKING OUR PROCS; WE WERE ABLE TO GAIN CTL OF CABIN AT FL180 AND FROM THERE PROCEEDED TO ZZZ1; AS OTHER ARPTS WOULD HAVE REQUIRED EXTENSIVE TSTM DEV TO GET TO.
Data retrieved from NASA's ASRS site as of January 2009 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.