Service difficulty report · Circuit Breaker · Boeing 747230B

Difficulty date
February 15, 2006
Submitted
February 16, 2006
Operation
Air carrier
Aircraft
N509MC
Make and model
Boeing 747230B
Aircraft serial
21221
Aircraft time
115,428 hours, 21,981 cycles
Part
Circuit Breaker
Condition
Tripped
Location
Generator
Stage of operation
TX
How discovered
V
Nature of condition
H
Precautionary procedure
D

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

What was found

GENERATORS NR 3 AND NR 4 SHOW NO GENERATOR LOAD AND NO VOLTS OF FREQ'S GENERATOR TEST SHOWS CSD RPM AND PMG FOR BOTH 3 AND 4. FOUND CIRCUIT BREAKERS FOR NR 3 AND NR 4 DISTRIBUTION METER POPPED, RESET BREAKERS AND RAN ENGINES PER MM 71-00-00. OPS CHECK NORMAL.