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A DC9-30 flight crew descends to FL240 after experiencing a partial loss of cabin pressure west of pmm, mi.
| Attributes | |
| ACN | 489517 |
| Time | |
| Date | 200010 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : pmm.vortac |
| State Reference | MI |
| Altitude | msl bound lower : 24000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 191 flight time total : 4500 flight time type : 3000 |
| ASRS Report | 489517 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : cabin press. gauge other flight crewa other flight crewb |
| Resolutory Action | controller : provided flight assist controller : issued new clearance flight crew : overcame equipment problem flight crew : overrode automation other |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Flight to dca. While at cruise at FL330 felt and saw cabin pressure rise from 8000 ft to 10000 ft at over 2000 FPM. Performed communication procedures for loss of cabin pressure. Told ZAU of problem and requested descent. ATC told us to turn to 090 degree heading and descend to FL240. By 25000 ft had cabin pressure under control and stopped descent at FL240. Told ATC that further descent nor assistance was required. Coordinated with company dispatch and maintenance to continue to destination. No passenger's masks deployed or were required. Coordinated with ATC to continue to dca. Cleared on course. Company maintenance inspected aircraft at dca.
Original NASA ASRS Text
Title: A DC9-30 FLC DSNDS TO FL240 AFTER EXPERIENCING A PARTIAL LOSS OF CABIN PRESSURE W OF PMM, MI.
Narrative: FLT TO DCA. WHILE AT CRUISE AT FL330 FELT AND SAW CABIN PRESSURE RISE FROM 8000 FT TO 10000 FT AT OVER 2000 FPM. PERFORMED COM PROCS FOR LOSS OF CABIN PRESSURE. TOLD ZAU OF PROB AND REQUESTED DSCNT. ATC TOLD US TO TURN TO 090 DEG HDG AND DSND TO FL240. BY 25000 FT HAD CABIN PRESSURE UNDER CTL AND STOPPED DSCNT AT FL240. TOLD ATC THAT FURTHER DSCNT NOR ASSISTANCE WAS REQUIRED. COORDINATED WITH COMPANY DISPATCH AND MAINT TO CONTINUE TO DEST. NO PAX'S MASKS DEPLOYED OR WERE REQUIRED. COORDINATED WITH ATC TO CONTINUE TO DCA. CLRED ON COURSE. COMPANY MAINT INSPECTED ACFT AT DCA.
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.