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SDR AALA2020030659002

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Service difficulty report · Fseu · Boeing 737823

FAA SDR system

Difficulty date
March 4, 2020
Submitted
March 13, 2020
Operation
Air carrier
Aircraft
N982NN
Make and model
Boeing 737823
Aircraft serial
31231
Aircraft time
13,847 hours, 5,655 cycles
System (JASC)
2751 · Trailing Flap Position Indicating System
Part
Fseu
Condition
Defective
Location
Te Flap
Stage of operation
CL
How discovered
O
Nature of condition
N
Precautionary procedure
A

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

What was found

AIRCRAFT WAS GROUNDED: DURING CLIMB INDICATION OF FLAP ASYMMETRY OCCURRED. AFTER RUNNING FLAP ASYMMETRY CHECK LIST LEADING EDGE FLAPS TRANSIT AMBER LIGHT ILLUMINATED AND STAYED ON FOR THE DURATION OF THE FLIGHT. THE AIRCRAFT RETURNED TO ONT, AN EMERGENCY WAS DECLARED. THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT AND WAS REMOVED FROM SERVICE. **SUPPLEMENTAL REPORT: REPLACED FLAP SLAT ELECTRONIC UNIT (FSEU) (AALA202003059002)PER AMM 27-51-01. ALSO REPLACED FLAP POSITION INDICATOR (AALA202003139019) PER AMM 27-58-02. ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK** (CLOSED)