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Air carrier widebody transport lost hydraulic pressure at start of a long trip and during an expedited descent used a wrong altimeter setting that resulted in altitude overshoot.
| Attributes | |
| ACN | 149008 |
| Time | |
| Date | 199006 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : jfk |
| State Reference | NY |
| Altitude | msl bound lower : 6690 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent 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 : 180 flight time total : 14500 flight time type : 500 |
| ASRS Report | 149008 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : overshoot non adherence : far non adherence : clearance non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
At FL330 en route to south europe about 45 mi south of jfk lost left hydraulic system. Quantity went to 0. Due to close proximity ot jfk, we made a very rapid descent in steps to 7000' qnh. Received altimeter setting from company, which was 30.07. Correct altimeter setting was 29.76. Error was caught at 7000' and remainder of approach and landing was normal. The workload on cockpit crew for such a quick diversion is very high and lends itself to errors.
Original NASA ASRS Text
Title: ACR WDB LOST HYDRAULIC PRESSURE AT START OF A LONG TRIP AND DURING AN EXPEDITED DESCENT USED A WRONG ALTIMETER SETTING THAT RESULTED IN ALT OVERSHOOT.
Narrative: AT FL330 ENRTE TO S EUROPE ABOUT 45 MI S OF JFK LOST LEFT HYD SYS. QUANTITY WENT TO 0. DUE TO CLOSE PROX OT JFK, WE MADE A VERY RAPID DSNT IN STEPS TO 7000' QNH. RECEIVED ALTIMETER SETTING FROM COMPANY, WHICH WAS 30.07. CORRECT ALTIMETER SETTING WAS 29.76. ERROR WAS CAUGHT AT 7000' AND REMAINDER OF APCH AND LNDG WAS NORMAL. THE WORKLOAD ON COCKPIT CREW FOR SUCH A QUICK DIVERSION IS VERY HIGH AND LENDS ITSELF TO ERRORS.
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.