B777 Back-up electrical system - TCAS
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B777 Back-up electrical system - TCAS
As I understand it if the power to one or both of the main AC busses is lost the backup electrical system automatically powers one or both transfer busses as required. To reduce electrical loading on the backup generator, the TCAS is not powered and is therefore inoperative.
Does shedding power to the TCAS have any impact on other Mode S transponder functions? (eg is ATC SSR impacted?)
Does shedding power to the TCAS have any impact on other Mode S transponder functions? (eg is ATC SSR impacted?)
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Originally Posted by MickG0105
Your suspicions and prioritisation of problems aside, can you help answer the question, Does shedding power to the TCAS have any impact on other Mode S transponder functions? (eg is ATC SSR impacted?)
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In flight if both transfer busses are unpowered the APU starts automatically regardless of APU switch position. 2 Backup generators (considered to be 1 generator) plus the APU generator will provide sufficient power to satisfy most electrical loads.
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Thank you, SoW.