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Aircraft equipment problem with imminent loss of all cabin pressure makes a standard rate of descent with reporter's complaining of less than desired rate of descent to FL200.
| Attributes | |
| ACN | 238344 |
| Time | |
| Date | 199304 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : orl |
| State Reference | FL |
| Altitude | msl bound lower : 17000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 127 flight time total : 7000 flight time type : 500 |
| ASRS Report | 238344 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 237776 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : overcame equipment problem flight crew : exited adverse environment |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
En route at FL370, left engine bleed off light with loss of duct pressure. Normally right pack would maintain pressure. After executing abnormal procedures for bleed off light, cabin pressure began to slowly rise. Requested lower altitude and both pilots went on oxygen and the APU was started to run the left pack. Regained pressurization control at approximately 20000 ft. Stopped descent at 17000 ft and continued en route. The only problems were ZJX slow to give lower altitudes and several frequency changes in the descent which proved to distract the pilots in descent. Supplemental information from acn 237776: several frequency changes made descent slower than I wanted (no emergency declared or needed).
Original NASA ASRS Text
Title: ACFT EQUIP PROB WITH IMMINENT LOSS OF ALL CABIN PRESSURE MAKES A STANDARD RATE OF DSCNT WITH RPTR'S COMPLAINING OF LESS THAN DESIRED RATE OF DSCNT TO FL200.
Narrative: ENRTE AT FL370, L ENG BLEED OFF LIGHT WITH LOSS OF DUCT PRESSURE. NORMALLY R PACK WOULD MAINTAIN PRESSURE. AFTER EXECUTING ABNORMAL PROCS FOR BLEED OFF LIGHT, CABIN PRESSURE BEGAN TO SLOWLY RISE. REQUESTED LOWER ALT AND BOTH PLTS WENT ON OXYGEN AND THE APU WAS STARTED TO RUN THE L PACK. REGAINED PRESSURIZATION CTL AT APPROX 20000 FT. STOPPED DSCNT AT 17000 FT AND CONTINUED ENRTE. THE ONLY PROBS WERE ZJX SLOW TO GIVE LOWER ALTS AND SEVERAL FREQ CHANGES IN THE DSCNT WHICH PROVED TO DISTRACT THE PLTS IN DSCNT. SUPPLEMENTAL INFO FROM ACN 237776: SEVERAL FREQ CHANGES MADE DSCNT SLOWER THAN I WANTED (NO EMER DECLARED OR NEEDED).
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.