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B777 flight crew reports TCAS failure during taxi out. Maintenance control deems this failure to be deferrable and flight departs. Enroute maintenance changes their mind.
| Attributes | |
| ACN | 824006 |
| Time | |
| Date | 200902 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Aircraft 1 | |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | TCAS Equipment |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 15000 Flight Crew Type 100 |
| Person 2 | |
| Function | Pilot Flying First Officer |
| Experience | Flight Crew Last 90 Days 92 Flight Crew Total 13000 Flight Crew Type 900 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural FAR Deviation - Procedural Published Material / Policy |
Narrative:
During taxi out; we received a TCAS EICAS message. After completing fom; we contacted maintenance control and dispatch. After consultation with maintenance; he informed us that according to the MEL the TCAS was deferrable. As the new MEL/maintenance release came off the printer; step C printed first and it was time stamped at XX15. Step C of the MEL stated; 'dispatch is authorized from departure stations outside of the continental united states; alaska; or hawaii.' the TCAS breaker was pulled and collared and the deferral sticker was placed appropriately on the transponder. We were #1 for takeoff and having a valid maintenance release and given the ok to proceed from dispatch and maintenance control; we continued with the flight. During flight; we were informed by dispatch that they (dispatch and maintenance control) misread the MEL and the dispatch was not legal. After reviewing the MEL; we also concurred with their findings. It was an honest mistake by all involved and should have been caught by any one of us. As the captain; I feel I should have caught this; however; the sequence of the printed MEL coupled with maintenance control's verbal ok contributed to the mistake.
Original NASA ASRS Text
Title: B777 flight crew reports TCAS failure during taxi out. Maintenance control deems this failure to be deferrable and flight departs. Enroute maintenance changes their mind.
Narrative: During taxi out; we received a TCAS EICAS message. After completing FOM; we contacted Maintenance Control and Dispatch. After consultation with maintenance; he informed us that according to the MEL the TCAS was deferrable. As the new MEL/Maintenance Release came off the printer; Step C printed first and it was time stamped at XX15. Step C of the MEL stated; 'Dispatch is authorized from departure stations outside of the continental United States; Alaska; or Hawaii.' The TCAS breaker was pulled and collared and the deferral sticker was placed appropriately on the transponder. We were #1 for takeoff and having a valid Maintenance Release and given the OK to proceed from Dispatch and Maintenance Control; we continued with the flight. During flight; we were informed by Dispatch that they (Dispatch and Maintenance Control) misread the MEL and the dispatch was not legal. After reviewing the MEL; we also concurred with their findings. It was an honest mistake by all involved and should have been caught by any one of us. As the Captain; I feel I should have caught this; however; the sequence of the printed MEL coupled with Maintenance Control's verbal OK contributed to the mistake.
Data retrieved from NASA's ASRS site as of April 2012 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.