Service difficulty report · Circuit Breaker · Boeing 7378H4

Difficulty date
September 7, 2023
Submitted
September 8, 2023
Operation
Air carrier
Aircraft
N8624J
Make and model
Boeing 7378H4
Aircraft serial
37004
Aircraft time
32,073 hours, 15,141 cycles
Part
Circuit Breaker
Part number
UNKNOWN
Condition
Overheated
Location
Zn 200 Fus Top
Stage of operation
NR
How discovered
9
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

CREW REPORTS: FIRE WARN LIGHT ON GLARESHIELD ILLUMINATED NEXT TO MASTER CAUTION LIGHT WHEN MASTER CAUTION ILLUMINATED. NO OTHER OVERHEAT OR FIRE WARNING INDICATIONS<[01] RESET C/B?S RELATED TO MASTER CAUTION AND OVERHEAT/FIRE WARNING SYSTEM. ALL CHECKS NORMAL. BITE OF ENGINE AND APU FIRE DETECTION CONTROL UNIT ARE NORMAL; TEST GOOD. WHEEL WELL;WING;LOWER BODY OVERHEAT DETECTION UNIT BITE IS NORMAL; TEST GOOD. NO PROBLEMS FOUND. REF FIM 31-52 TASK 801; AMM 26-10-00 AND AMM 26-18-00.

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