Service difficulty report · Buss · Beech B300B350C

Difficulty date
July 5, 2012
Submitted
July 11, 2012
Operation
General aviation
Aircraft
N291B
Make and model
Beech B300B350C
Aircraft serial
FL559
Aircraft time
1,226 hours, 979 cycles
Part
Buss
Condition
Damaged
Stage of operation
TX
How discovered
V
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

WHEN THE BATTERY SWITCH WAS MOVED TO THE "ON" POSITION, ELECTRICAL POWER WAS BEING APPLIED TO THE LT GENERATOR BUSS WITH THE BUSS TIES OPEN. LT GENERATOR BUSS SHOULD ONLY HAVE POWER WHEN THE BUSS TIES ARE CLOSED. FOUND THE RT CIRCUIT BREAKER PANEL TRIPLE FED BUSS LINK (W50) WAS MAKING CONTACT WITH THE LT GENERATOR BUSS LINK (W49). THEREFORE SUPPLYING POWER FROM THE TRIPLE FED BUSS TO THE LT GENERATOR BUS AS SOON AS THE BATTERY SWITCH WAS TURNED ON.