Air India B787 crash Ahmedabad

Thread starter OZDUCK
Start date Jun 12, 2025

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Today at 10:06 PM

#581

RSD said:
So the FDR might have been getting different information to the FADEC then.

The fuel cut off switches directly operate a relay which operates the valve which control fuel flow to the engine called a Spar valve without ever going via FADEC.

While FADEC can control the Spar valve (I think) , the important point to note is that the prelim report data came from the EAFR (787 combined FDR+CVR) which indicated the Fuel cut off switches were operated. Operation of The fuel cut of switches is directly recorded by EAFR and does not involve FADEC so any "FADEC glitch" could not have caused the recording of fuel cut off switch condition to OFF by the EAFR.

Last edited: Today at 10:33 PM

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