![]() |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Attributes | |
ACN | 92327 |
Time | |
Date | 198808 |
Day | Wed |
Local Time Of Day | 1201 To 1800 |
Place | |
Locale Reference | airport : sna |
State Reference | CA |
Altitude | agl bound lower : 0 agl bound upper : 0 |
Environment | |
Flight Conditions | VMC |
Light | Daylight |
Aircraft 1 | |
Operator | common carrier : air carrier |
Make Model Name | Medium Large Transport |
Navigation In Use | Other |
Flight Phase | ground : preflight |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air carrier |
Function | flight crew : captain oversight : pic |
Qualification | pilot : atp pilot : instrument pilot : flight engineer pilot : commercial |
Experience | flight time last 90 days : 200 flight time total : 11000 flight time type : 2300 |
ASRS Report | 92327 |
Person 2 | |
Affiliation | company : air carrier |
Function | flight crew : first officer |
Qualification | pilot : commercial pilot : instrument |
Events | |
Anomaly | non adherence : far other anomaly other |
Independent Detector | other flight crewa |
Resolutory Action | none taken : detected after the fact |
Consequence | faa : reviewed incident with flight crew |
Supplementary | |
Primary Problem | Flight Crew Human Performance |
Air Traffic Incident | other |
Narrative:
An engine hydraulic pump valve was placed on the MEL by maintenance and two flts were flown in that condition. The engine hydraulic pump valve was inoperative in the open position. We subsequently determined that this specific pump valve should not have been operated inoperative under the MEL and it had been confused with another hydraulic valve with a similar sounding nomenclature. Contributing factors - pressure to maintain schedule, minimize delays, not questioning a maintenance decision, pilot fatigue, 4-DAY trip with long duty days, many flts and minimum rest overnight periods.
Original NASA ASRS Text
Title: MINIMUM EQUIPMENT LIST REQUIREMENT MISINTERPRETED.
Narrative: AN ENG HYD PUMP VALVE WAS PLACED ON THE MEL BY MAINT AND TWO FLTS WERE FLOWN IN THAT CONDITION. THE ENG HYD PUMP VALVE WAS INOPERATIVE IN THE OPEN POS. WE SUBSEQUENTLY DETERMINED THAT THIS SPECIFIC PUMP VALVE SHOULD NOT HAVE BEEN OPERATED INOPERATIVE UNDER THE MEL AND IT HAD BEEN CONFUSED WITH ANOTHER HYD VALVE WITH A SIMILAR SOUNDING NOMENCLATURE. CONTRIBUTING FACTORS - PRESSURE TO MAINTAIN SCHEDULE, MINIMIZE DELAYS, NOT QUESTIONING A MAINT DECISION, PLT FATIGUE, 4-DAY TRIP WITH LONG DUTY DAYS, MANY FLTS AND MINIMUM REST OVERNIGHT PERIODS.
Data retrieved from NASA's ASRS site as of August 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.