Service difficulty report · Circuit Card · Boeing 7673P6

Difficulty date
August 15, 2026
Submitted
August 17, 2026
Operation
Air carrier
Aircraft
N764CK
Make and model
Boeing 7673P6
Aircraft serial
26234
Aircraft time
90,032 hours, 28,411 cycles
Part
Circuit Card
Condition
Tripped
Location
Fire Detection
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

DURING POWER TRANSFER APU TO GPU, LT ENG FIRE LOOP 1 MESSAGE. RESET BOTH FUSE CARDS M681 (LOOP1) M683(LOOP 2) PERFORMED OPS TEST ON SYSTEM ALL CHECKED GOOD IAW AMM 26-10-01 ACFT REMAINS NO ETOPS. A/C RETURNED TO SERVICE.

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