SDR CALA2023032200840

Service difficulty report · Flap · Boeing 757*

Difficulty date: March 22, 2023
Submitted: March 22, 2023
Operation: Air carrier
Aircraft: N75861
Make and model: Boeing 757*
Aircraft serial: 32585
Aircraft time: 65,502 hours, 20,368 cycles
System (JASC): 2751 · Trailing Flap Position Indicating System
Part: Flap
Part number: NA
Condition: Warning Light
Location: Te Flaps
Stage of operation: DE
How discovered: O
Nature of condition: J
Precautionary procedure: B

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

What was found

TE FLAPS DISAGREE ON SHORT FINAL FLAPS AROUND 24 DEGREES RAN FLAPS BACK TO FULL UP IN ALTERNATE MODE. POWERED ALL 3 HYD FLAPS 25, THEN TO FLAPS 30. OPS CHKS GOOD. WENT FROM FLAPS 30 SYSTEMS AND EXTENDED FLAPS TO FLAPS 30, FLAPS EXTENDED NORMALLY. BACK TO FLAPS 20, AND THEN TO FULLY RETRACTED, OPS CHKS GOOD. RAN FLAPS BACK TO FULL UP HYDRAULICALLY, FLAPS RETRACTED FLAPS OPS CHECK NORMAL. FSEU BITE ON BOTH FSEU''S SHOW NO NORMALLY. RAN FLAPS TO FLAPS 20, AND THEN FROM FLAPS 20 WENT TO EXISTING FAULTS.