Service difficulty report · Switch · Boeing 777300ER

Difficulty date
May 8, 2026
Submitted
May 11, 2026
Operation
Air carrier
Aircraft
N2251U
Make and model
Boeing 777300ER
Aircraft serial
66591
Aircraft time
26,933 hours, 3,129 cycles
Part
Switch
Condition
Malfunctioned
Location
Zone 200
Stage of operation
CR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

EMERGENCY LIGHTS CAME ON IN CRUISE. MOVED SWITCH TO OFF AND THEY STAYED ON. MOVED SWITCH TO ON AND THEN BACK TO ARMED AND LIGHTS WENT OUT. PERFORMED FIM PROCEDURE PER B773 FIM 33-51 TASK 802. NO ACTIVE CORRELATED MAINTENANCE MESSAGE. PERFORMED OPS TEST OF THE EMERGENCY LIGHTS WITH THE CONTROL SWITCHES IAW AMM 33-51-00-710-803. TEST SATISFACTORY. REV. 106.

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