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An MD80 flight crew overshoots their assigned altitude of FL230 when believing they had been assigned FL240 during a hydraulic emergency on board 40 NM east of sat.
| Attributes | |
| ACN | 482010 |
| Time | |
| Date | 200008 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : sat.vortac |
| State Reference | TX |
| Altitude | msl bound lower : 23000 msl bound upper : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu.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 |
| Navigation In Use | other vortac |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 150 flight time total : 4000 flight time type : 250 |
| ASRS Report | 482010 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 300 flight time total : 23100 flight time type : 500 |
| ASRS Report | 481641 |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory flight crew : declared emergency flight crew : landed in emergency condition none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | Environmental Factor ATC Human Performance Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Leveloff at FL240. Controller called, said we'd only been cleared to FL230. We believe we'd been cleared to FL240. Thought readback clearance was for FL240. Some confusion exists. At the time of the incident, we were also experiencing loss of hydraulic pressure, which resulted in our declaring an emergency and landing at houston, bush intercontinental. Supplemental information from acn 481641: thought I read back FL240.
Original NASA ASRS Text
Title: AN MD80 FLC OVERSHOOTS THEIR ASSIGNED ALT OF FL230 WHEN BELIEVING THEY HAD BEEN ASSIGNED FL240 DURING A HYD EMER ON BOARD 40 NM E OF SAT.
Narrative: LEVELOFF AT FL240. CTLR CALLED, SAID WE'D ONLY BEEN CLRED TO FL230. WE BELIEVE WE'D BEEN CLRED TO FL240. THOUGHT READBACK CLRNC WAS FOR FL240. SOME CONFUSION EXISTS. AT THE TIME OF THE INCIDENT, WE WERE ALSO EXPERIENCING LOSS OF HYD PRESSURE, WHICH RESULTED IN OUR DECLARING AN EMER AND LNDG AT HOUSTON, BUSH INTERCONTINENTAL. SUPPLEMENTAL INFO FROM ACN 481641: THOUGHT I READ BACK FL240.
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.