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ME
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Jul 23

On Ground Failure Flowchart:

Hi, Guys. What’s the recommended flowchart of actions to manage a failure or malfunction between the moment you have just started to taxi out and the moment that you have just started to apply the takeoff power? Stop -> Memory Items (if applicable) -> Reset (If applicable) -> NNC; if recovered, continue normal flight; if not recovered, return to gate?

Hi there! When there is any failure/malfunction on the ground between the time engines are started up to when takeoff thrust is set, the course of action would be NNC including memory items and then checking MEL and CDL. Some companies allow the pilots to perform redispatch depending on the failure and others require them to come back to the gate and have it signed off for redispatch. It is also worth mentioning that you might abort takeoff up to V1 and if did so, it’d be required to check brake cooling schedule depending on the airspeed at which the takeoff was aborted. I hope to have helped and I’m here to learn with you too!

Hi @Pablo Farias Dezontini! As @Claudio Augusto Corrêa e Castro correctly says these would be the actions for on-ground non-normal situations.


Here is a quote from the QRH Checklist Instructions:

"During engine start and before takeoff, the associated non–normal checklist is done if a non-normal situation is identified. After completion of the checklist, the Dispatch Deviations Guide or operator equivalent is consulted to determine if Minimum Equipment List dispatch relief is available."


Some airlines have the MEL dispatch phase set to: "aeroplane starts to move under its own power". In which case you would not be restricted by MEL during the taxi, but it is still recommended to check the MEL as the failure may have limitations for the next flight.


Hope this helps:)


Petr