Service difficulty report · Guard · Boeing 7478F

Difficulty date
December 19, 2025
Submitted
December 19, 2025
Operation
Air carrier
Aircraft
N621UP
Make and model
Boeing 7478F
Aircraft serial
65785
Aircraft time
22,486 hours, 3,333 cycles
Part
Guard
Condition
Out Of Adjust
Location
Switch
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

EMER LIGHTS SWITCH DOES NOT GO TO ARMED WHEN GUARD IS CLOSED. ADJUSTED THE EMER LIGHT SWITCH GUARD AND OPERATION TEST,SWITCH BACK TO ARMED WHEN GUARD IS CLOSED IAW AMM 33-51-00.

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