SDR AALA201710209018

Service difficulty report · Fseu · Boeing 737823

Difficulty date: October 19, 2017
Submitted: October 21, 2017
Operation: Air carrier
Aircraft: N818NN
Make and model: Boeing 737823
Aircraft serial: 30910
System (JASC): 2751 · Trailing Flap Position Indicating System
Part: Fseu
Part number: 285A12002
Condition: Unreliable
Location: Te Flap
Stage of operation: DE
How discovered: O
Nature of condition: F
Precautionary procedure: O

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

What was found

AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED. DURING DESCENT, LEFT FLAP NEEDLE ON FLAP POSITION INDICATOR BEGAN TO MIGRATE AWAY FROM THE UP POSITION CREATING A L/R NEEDLE SPLIT. UNEVENTFUL LANDING WITH TRAILING EDGE FLAPS UP. REMOVED AND REPLACED FLAP POSITION INDICATOR PER AMM 27-58-02 (AALA20171020002) AND FLAP/SLAT ELECTRONICS UNIT PER AMM 27-51-01. OPERATIONAL CHECK GOOD.