Service difficulty report · Switch · Boeing 7878

Difficulty date
January 21, 2026
Submitted
January 23, 2026
Operation
Air carrier
Aircraft
N27901
Make and model
Boeing 7878
Aircraft serial
34821
Aircraft time
50,603 hours, 6,266 cycles
Part
Switch
Condition
Out Of Position
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 LIGHTS ADVISORY FLIGHT DECK EMERGENCY LIGHT SWITCH IS NOT IN THE ARMED POSITION, OR SWITCH IS IN ARMED POSITION AND FLIGHT ATTENDANT EMERGENCY L IGHT SWITCH SELECTED ON, OR THE SYSTEM CONTROLS ARE IN THE ARMED STATE AND THE 115 VAC TO AT LEAST ONE OF THE PRIME WCUS HAS BE CREW RESLOVED ISSUE WITH OVERHEAD EMER LIGNTS SWITCH. NO MAINT ACTION TAKEN.

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