Service difficulty report · Transmitter · Boeing 737890

Difficulty date
November 5, 2017
Submitted
November 9, 2017
Operation
Air carrier
Aircraft
N596AS
Make and model
Boeing 737890
Aircraft serial
35688
Aircraft time
36,309 hours, 11,068 cycles
Part
Transmitter
Part number
18173810
Part serial
4585
Condition
Failed
Location
Lt Wing Te Flap
Part time
67,432 hours, 24,952 cycles
Stage of operation
AP
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

DURING FLAP SELECTION, THE TRAILING EDGE FLAP NEEDLE WAS STUCK AT FLAPS 2 DEGREES EVEN THOUGH THE FLAP HANDLE WAS AT 40 DEGREES. DURING THE FINAL LANDING CHECK, RECEIVED FLAP 2 DEGREES INDICATION STILL AND WENT AROUND AND PROCEEDED TO DO THE TRAILING EDGE FLAP DISAGREE CHECKLIST AND LANDED WITH FLAP 15 DEGREES, LEADING EDGE FLAPS NEVER CAME UP. ACFT GROUNDED. PERFORMED BITE ON FSEU, FOUND FAULT MESSAGE 27-52261. TE FLAPS SENSOR DISAGREE. REMOVED & REPLACED THE RT FLAP POSITION TRANSMITTER IAW AMM 27-58-01. ACCOMPLISHED FIM 27-51, 813. FOUND DEFECTIVE T427 LT FLAP POSITION TRANSMITTER. REPLACED T427 IAW AMM 27-58-01. ADJUSTED, IAW AMM 27-58-01-820-801. OPS CHECKED NORMAL IAW FIM 27-51, 801 FSEU BITE TEST.