PPRuNe Forums - ?? B737NG APU Auto-shutdown ??

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- - ?? B737NG APU Auto-shutdown ?? (https://www.pprune.org/tech-log/492313-b737ng-apu-auto-shutdown.html)

HalinTexas

6th Aug 2012 07:30

?? B737NG APU Auto-shutdown ??

Can someone answer:

The APU has an auto-shutdown feature for fire. Why does it not automatically fire the extinguishers?

spannersatcx

6th Aug 2012 08:41

Apu's are either monitored or unmonitored, by the a/c systems, if it's unmonitored then the a/c should not be left unattended so in case of a fire YOU fire the bottle.

NSEU	6th Aug 2012 23:21

Some aircraft APUs auto-extinguish on the ground, but not in the air. In the air, the pilots are monitoring the aircraft. On the ground, there may be no one in attendance.

Rgds
NSEU

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