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Thread: 737NG TR UNIT light
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Old 15th January 2014 | 09:55
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Jwscud
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Joined: Sep 2008
: ATPL
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From: Scotland
TR1 will power DC Bus 1 and 2 through the cross bus tie relay.

The battery bus and DC Standby bus remain powered via the battery charger in TR mode from Transfer bus 2.

It's hidden in the battery Charger transformer/Rectifier on 6.20.9
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