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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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A DC9-40 in climb at 16000 ft diverted due to unable to maintain cabin pressure. Left pack previously deferred and reported cause of pressure leak.
| Attributes | |
| ACN | 493285 |
| Time | |
| Date | 200011 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dtw.airport |
| State Reference | MI |
| Altitude | msl single value : 16000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d21.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 40 |
| Operating Under FAR Part | Part 121 |
| Route In Use | departure : other published ifr departure |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 16000 flight time type : 3000 |
| ASRS Report | 493285 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : cabin altimeter indicator other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : logbook entry performance deficiency : fault isolation |
| Supplementary | |
| Problem Areas | Environmental Factor Flight Crew Human Performance Maintenance Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Aircraft would not maintain pressurization. Outflow valve full closed. Left pack was MEL'ed (air was leaking out through the pack, or so they thought). Cabin continued to climb at 900 FPM. We returned to dtw.
Original NASA ASRS Text
Title: A DC9-40 IN CLB AT 16000 FT DIVERTED DUE TO UNABLE TO MAINTAIN CABIN PRESSURE. L PACK PREVIOUSLY DEFERRED AND RPTED CAUSE OF PRESSURE LEAK.
Narrative: ACFT WOULD NOT MAINTAIN PRESSURIZATION. OUTFLOW VALVE FULL CLOSED. L PACK WAS MEL'ED (AIR WAS LEAKING OUT THROUGH THE PACK, OR SO THEY THOUGHT). CABIN CONTINUED TO CLB AT 900 FPM. WE RETURNED TO DTW.
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.