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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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MD80 super anti-ice all on at FL330 flight crew unable to maintain cabin pressurization, executes an emergency descent.
| Attributes | |
| ACN | 334468 |
| Time | |
| Date | 199604 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : vhp |
| State Reference | IN |
| Altitude | msl bound lower : 33000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 334468 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 334469 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : declared emergency |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
WX in clouds. Thunderstorms in area. Uncontrollable cabin climb at FL330. Air-conditioning packs normal. Outflow valve closed. Flow light on. Performed operating manual procedures. No help. Made emergency descent using checklist procedures. Per bulletins and discussion with tulsa technician this appears to be a recurring MD80 super problem. Crews need more information, especially concerning the procedure of turning the packs warmer in order to unfreeze the water separator.
Original NASA ASRS Text
Title: MD80 SUPER ANTI-ICE ALL ON AT FL330 FLC UNABLE TO MAINTAIN CABIN PRESSURIZATION, EXECUTES AN EMER DSCNT.
Narrative: WX IN CLOUDS. TSTMS IN AREA. UNCTLABLE CABIN CLB AT FL330. AIR-CONDITIONING PACKS NORMAL. OUTFLOW VALVE CLOSED. FLOW LIGHT ON. PERFORMED OPERATING MANUAL PROCS. NO HELP. MADE EMER DSCNT USING CHKLIST PROCS. PER BULLETINS AND DISCUSSION WITH TULSA TECHNICIAN THIS APPEARS TO BE A RECURRING MD80 SUPER PROB. CREWS NEED MORE INFO, ESPECIALLY CONCERNING THE PROC OF TURNING THE PACKS WARMER IN ORDER TO UNFREEZE THE WATER SEPARATOR.
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.