SDR CALA2017091103126

Service difficulty report · Flap System · Boeing 757222

Difficulty date: September 11, 2017
Submitted: September 11, 2017
Operation: Air carrier
Aircraft: N589UA
Make and model: Boeing 757222
Aircraft serial: 28707
Aircraft time: 74,809 hours, 19,722 cycles
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Flap System
Condition: Malfunctioned
Location: Te Flaps
Stage of operation: AP
How discovered: O
Nature of condition: F, J
Precautionary procedure: O

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

What was found

TRAILING EDGE FLAP SYSTEM EICAS MESSAGE TE FLAP DISAGREE WHEN TE FLAP POSITION SELECTED. FLAPS FAILED TO MOVE TO SELECTED POSIT ION TE FLAPS DISAGREE ON FINAL. LANDED FLAPS 20 USING ALTERNATE FLAPS. EMERGENCY DECLARED. ON INITIAL VISIT TO COCKPIT FOUND NO EICAS MESSAGE PERFORMED TEST OF TE FLAP SYS TASK 27-51-00-715-001 AND PERFORMED FSEU (-1,-2) BITE TEST , FOUND FLAP LD RELIEF MESSAGE WHICH IS NORMAL OPERATION WHEN MET WITH EXTREME AIR LOADS. FLAP TE FLAP SYS IS GOOD ALL CHECKS PASSED.