Service difficulty report · Flap System · Boeing 75724APF

Difficulty date
August 18, 2026
Submitted
August 19, 2026
Operation
Air carrier
Aircraft
N406UP
Make and model
Boeing 75724APF
Aircraft serial
23728
Aircraft time
39,734 hours, 26,696 cycles
Part
Flap System
Condition
Warning Message
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

EMD ON CLIMB OUT AT APPROX 3K' WE GOT A LE SLAT DISAGREE EICAS. MAINTAINED 230 KT OR LESS FOR ENTIRE FLIGHT. AFTER QRH PROCEDURE, MSG WENT OUT. PERFORMED BITE PROCEDURE IAW FIM 27-51 FAULT TREE 805 FLAP/SLAT ELECTRONIC UNIT (FSEU) BITE PROCEDURE. FOUND ALTERNATE FLAP SWITCH NOT IN NORMAL POSITION. PLACED ALTERNATE FLAP SWITCH IN NORMAL POSITION BITE PROCEDURE PASSED WITH NO FAULTS. FLAPS AND LE SLATS OPS CHECK GOOD IN ALTERNATE AND HYDRAULIC.

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