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A B777-200 was being pushed back when the captain discovered 1 thrust reverser and 1 brake were being deferred as inoperative. MEL does not permit this combination.
| Attributes | |
| ACN | 652560 |
| Time | |
| Date | 200503 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : pushback |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 200 flight time total : 20000 flight time type : 4000 |
| ASRS Report | 652560 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : company policies non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other Other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : repair performance deficiency : logbook entry performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Chart Or Publication Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft was dispatched with both an engine thrust reverser inoperative; and 1 main wheel anti-skid inoperative (ie; wheel brake inoperative). Already had obtained both flight release and new maintenance release. Shortly prior to pushback; captain had flight manual reviewed for dispatch with 1 or 2 brakes inoperative procedures. Discovered illegal dispatch due flight manual limitation on prohibition of both items cannot be inoperative on same flight. Called both lead mechanic and maintenance controller; both concurred. I feel this is a gross oversight both on those who originated the MEL text and the FAA for having approved the MEL without reference/xref of inoperative brake and inoperative thrust reverser. Flight was further delayed until necessary parts obtained to effect repairs.
Original NASA ASRS Text
Title: A B777-200 WAS BEING PUSHED BACK WHEN THE CAPT DISCOVERED 1 THRUST REVERSER AND 1 BRAKE WERE BEING DEFERRED AS INOP. MEL DOES NOT PERMIT THIS COMBINATION.
Narrative: ACFT WAS DISPATCHED WITH BOTH AN ENG THRUST REVERSER INOP; AND 1 MAIN WHEEL ANTI-SKID INOP (IE; WHEEL BRAKE INOP). ALREADY HAD OBTAINED BOTH FLT RELEASE AND NEW MAINT RELEASE. SHORTLY PRIOR TO PUSHBACK; CAPT HAD FLT MANUAL REVIEWED FOR DISPATCH WITH 1 OR 2 BRAKES INOP PROCS. DISCOVERED ILLEGAL DISPATCH DUE FLT MANUAL LIMITATION ON PROHIBITION OF BOTH ITEMS CANNOT BE INOP ON SAME FLT. CALLED BOTH LEAD MECH AND MAINT CTLR; BOTH CONCURRED. I FEEL THIS IS A GROSS OVERSIGHT BOTH ON THOSE WHO ORIGINATED THE MEL TEXT AND THE FAA FOR HAVING APPROVED THE MEL WITHOUT REF/XREF OF INOP BRAKE AND INOP THRUST REVERSER. FLT WAS FURTHER DELAYED UNTIL NECESSARY PARTS OBTAINED TO EFFECT REPAIRS.
Data retrieved from NASA's ASRS site as of January 2009 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.