 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
MD88 flight crew declared emergency due to pressurization loss and descended through last assigned altitude, FL240, due to continued problem before further ATC notification.
| Attributes | |
| ACN | 512161 |
| Time | |
| Date | 200105 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : mol.vor |
| State Reference | VA |
| Altitude | msl bound lower : 10000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc tower : bfl.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 240 flight time total : 6400 flight time type : 300 |
| ASRS Report | 512161 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 182 flight time total : 10400 flight time type : 4900 |
| ASRS Report | 511776 |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : overcame equipment problem flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Due to air conditioning pack problems, aircraft began losing pressurization at cruise altitude. Captain declared an emergency and notified ATC as soon as possible that we were descending to 10000 ft MSL. We descended initially from FL350 toward FL240 under ATC clearance. Due to rapid rise in cabin altitude and ATC frequency congestion, we continued descent through FL240 (assigned flight level) toward 10000 ft MSL. No traffic on TCASII or visually. Cleared to 10000 ft at approximately FL230.
Original NASA ASRS Text
Title: MD88 FLC DECLARED EMER DUE TO PRESSURIZATION LOSS AND DSNDED THROUGH LAST ASSIGNED ALT, FL240, DUE TO CONTINUED PROB BEFORE FURTHER ATC NOTIFICATION.
Narrative: DUE TO AIR CONDITIONING PACK PROBS, ACFT BEGAN LOSING PRESSURIZATION AT CRUISE ALT. CAPT DECLARED AN EMER AND NOTIFIED ATC AS SOON AS POSSIBLE THAT WE WERE DSNDING TO 10000 FT MSL. WE DSNDED INITIALLY FROM FL350 TOWARD FL240 UNDER ATC CLRNC. DUE TO RAPID RISE IN CABIN ALT AND ATC FREQ CONGESTION, WE CONTINUED DSCNT THROUGH FL240 (ASSIGNED FLT LEVEL) TOWARD 10000 FT MSL. NO TFC ON TCASII OR VISUALLY. CLRED TO 10000 FT AT APPROX FL230.
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.