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MD80 crew lost cabin pressurization. During the emergency descent, the crew accidentally misset the transponder to the hijack code.
| Attributes | |
| ACN | 500950 |
| Time | |
| Date | 200102 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mygf.airport |
| State Reference | FO |
| Altitude | msl single value : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute : other oceanic enroute other |
| 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 : 21000 flight time type : 18000 |
| ASRS Report | 500950 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : company policies non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other controllera other flight crewa other flight crewb |
| Resolutory Action | flight crew : declared emergency flight crew : landed in emergency condition other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
Loss of aircraft pressurization requiring an emergency descent. Unable to maintain radio contact with ZMA. Needed further descent. Squawk 7500 instead of 7700 on transponder. Problem LCD readout on transponder difficult to read from captain's seat. Also a raised knob blocks view. 7500 squawk set hijacking response into action. Loss of pressurization due to going into manual control of temperature on right air condition system.
Original NASA ASRS Text
Title: MD80 CREW LOST CABIN PRESSURIZATION. DURING THE EMER DSCNT, THE CREW ACCIDENTALLY MISSET THE XPONDER TO THE HIJACK CODE.
Narrative: LOSS OF ACFT PRESSURIZATION REQUIRING AN EMER DSCNT. UNABLE TO MAINTAIN RADIO CONTACT WITH ZMA. NEEDED FURTHER DSCNT. SQUAWK 7500 INSTEAD OF 7700 ON XPONDER. PROB LCD READOUT ON XPONDER DIFFICULT TO READ FROM CAPT'S SEAT. ALSO A RAISED KNOB BLOCKS VIEW. 7500 SQUAWK SET HIJACKING RESPONSE INTO ACTION. LOSS OF PRESSURIZATION DUE TO GOING INTO MANUAL CTL OF TEMP ON R AIR CONDITION SYS.
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.