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Flight crew of medium large transport accepted the aircraft with a minimum equipment list write-up accomplished, but in flight unable to engage automatic throttles. Landing at destination further maintenance determined aircraft should not have been flown.
| Attributes | |
| ACN | 169950 |
| Time | |
| Date | 199102 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : pit |
| State Reference | PA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 9000 flight time type : 600 |
| ASRS Report | 169950 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : instrument pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : far other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Arrived at aircraft to find MEL for 'thrust reverser unlatched.' procedure called for manual storing or reverser and MEL per regulations was accomplished. MEL indicated only 1 reverser necessary for flight. We took aircraft. On before takeoff checklist decided not to arm automatic throttle because of reverser MEL. Once airborne the automatic throttles would not arm. Arriving at destination airport (cle), the automatic throttle was written up in log book. For dispatch, 1 automatic throttle channel is required. Maintenance found no problem with automatic throttles, except they would not engage. Findings were that with the thrust reverse not locked, displayed on MFDU, it automatically disarmed automatic throttles and would not allow them to engage, which are necessary for flight. Aircraft should not have been dispatched west/O further investigation of reverser problem at departure city. A mishap (irregular operations) report has been filed with the company.
Original NASA ASRS Text
Title: FLT CREW OF MLG ACCEPTED THE ACFT WITH A MINIMUM EQUIPMENT LIST WRITE-UP ACCOMPLISHED, BUT IN FLT UNABLE TO ENGAGE AUTO THROTTLES. LNDG AT DESTINATION FURTHER MAINTENANCE DETERMINED ACFT SHOULD NOT HAVE BEEN FLOWN.
Narrative: ARRIVED AT ACFT TO FIND MEL FOR 'THRUST REVERSER UNLATCHED.' PROC CALLED FOR MANUAL STORING OR REVERSER AND MEL PER REGS WAS ACCOMPLISHED. MEL INDICATED ONLY 1 REVERSER NECESSARY FOR FLT. WE TOOK ACFT. ON BEFORE TKOF CHKLIST DECIDED NOT TO ARM AUTO THROTTLE BECAUSE OF REVERSER MEL. ONCE AIRBORNE THE AUTO THROTTLES WOULD NOT ARM. ARRIVING AT DEST ARPT (CLE), THE AUTO THROTTLE WAS WRITTEN UP IN LOG BOOK. FOR DISPATCH, 1 AUTO THROTTLE CHANNEL IS REQUIRED. MAINT FOUND NO PROB WITH AUTO THROTTLES, EXCEPT THEY WOULD NOT ENGAGE. FINDINGS WERE THAT WITH THE THRUST REVERSE NOT LOCKED, DISPLAYED ON MFDU, IT AUTOMATICALLY DISARMED AUTO THROTTLES AND WOULD NOT ALLOW THEM TO ENGAGE, WHICH ARE NECESSARY FOR FLT. ACFT SHOULD NOT HAVE BEEN DISPATCHED W/O FURTHER INVESTIGATION OF REVERSER PROB AT DEP CITY. A MISHAP (IRREGULAR OPS) RPT HAS BEEN FILED WITH THE COMPANY.
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.