Service difficulty report · Fuse · Boeing 7378

Difficulty date
December 18, 2025
Submitted
December 30, 2025
Operation
Air carrier
Aircraft
N8777Q
Make and model
Boeing 7378
Aircraft serial
67756
Aircraft time
10,553 hours, 5,310 cycles
Part
Fuse
Condition
Inoperative
Location
Zone 200
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

EMERGENCY EXIT INDICATOR LIGHT L1358 (AFT RH OVERWING DOOR) IS INOP EMERGENCY EXIT INDICATOR LIGHT L1358 (AFT RH OVERWING DOOR) IS INOP RELATED TO BATTERY PACK M1671. UPON FURTHER INVESTIGATION, FOUND THAT EMERGENCY EXIT INDICATOR LIGHT L1358 AND OVERWING ESCAPE LIGHT L7 WERE NOT WORKING, THOSE LIGHT ASSOCIATED TO FUSE 1- BATTERY PACK M1671. REPLACED FUSE 1 DEL BATTERY PACK M1671 AND PERFORMED GOOD TEST OF THE NEW FUSE IAW AMM 33-51-06-960-801.

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