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Thread: 737NG TR UNIT light
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Old 15th Jan 2014, 09:55
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Jwscud
 
Join Date: Sep 2008
Location: Scotland
Posts: 894
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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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