Service difficulty report · Fire Warning · Boeing 76734AF

Difficulty date
April 1, 2022
Submitted
April 1, 2022
Operation
Air carrier
Aircraft
N347UP
Make and model
Boeing 76734AF
Aircraft serial
37871
Aircraft time
24,499 hours, 8,810 cycles
Engine
Ge CF680C2*
Part
Fire Warning
Condition
False Activation
Location
Lt Engine
Stage of operation
TX
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

L ENG FIRE LOOP STATUS MESSAGE. C/W AFOLTS TEST PER 26 11 00 715 001 NO FAULTS NOTED DISCONNECTED D4200P AND D4230P AND CHECKED RESISTANCE OF ALL WIRE SEGMENTS AND LOOPS FOUND WIRE W5334-001R-16 HAD 2.8 OHMS RESISTANCE. RECONNECTED D4200P AND D4230P AND C/W AFOLTS TEST AGAIN. OPS CHECK GOOD. THIS CLEARS 777489.C/W AFOLTS TEST PER 26 11 00 715 001 NO FAULTS NOTED DISCONNECTED D4200P AND D4230P AND CHECKED RESISTANCE OF ALL WIRE SEGMENTS AND LOOPS FOUND WIRE W5334-001R-16 HAD 2.8 OHMS RESISTANCE. RECONNECTED D4200P AND D4230P AND C/W AFOLTS TEST AGAIN. OPS CHECK GOOD.

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