Service difficulty report · Control Module · Boeing 7377K9

Difficulty date
July 24, 2026
Submitted
August 22, 2026
Operation
Air carrier
Aircraft
N7879A
Make and model
Boeing 7377K9
Aircraft serial
34321
Aircraft time
62,644 hours, 32,875 cycles
Part
Control Module
Condition
Faulted
Location
Zone 400
Stage of operation
TX
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

NR 2 ENGINE OVERHEAT LIGHT ILLUMINATED AFTER START. PERFOMED BITE TEST OF ENGINE FIRE DETECTION CONTROL MODULE REF FIM 26-10 TASK 801. NO FAULTS PRESENT. PER FIM 26-10 TASK 811 NEXT STEP REQUIRES HIGHT POWER ENGINE RUN. PER FIM 26-10 NO OBVIOUS DEFECTS RESISTANCE CHECK IS GOOD STILL REQUIRES HIGH POWER RUN. REF TTG8Q01DCUH FOR BITE CHECK OF ENGINE FIRE DETECTION MODULE AND RESISTANCE CHECKS OF ENG FIRE DETECTION LOOP. PERFORMED INSPECTION OF #2 ENG CORE PER FIM 26-10 TASK 811. NO OBVIOUS DEFECTS. PERFORMED IDLE RUN OF #2 EN PER AMM 71-00-00. NO FAULTS NOTED. PERFORMED HIGH POWER RUN PER FIM 26-10 TASK 811. NO FAULTS NOTED. OVERHEAT LIGHT DID NOT ILLUMINATE.

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