SDR AALA201712269057

Service difficulty report · Flap · Boeing 737823

Difficulty date: December 22, 2017
Submitted: December 29, 2017
Operation: Air carrier
Aircraft: N957NN
Make and model: Boeing 737823
Aircraft serial: 31202
Aircraft time: 10,906 hours, 3,953 cycles
System (JASC): 2751 · Trailing Flap Position Indicating System
Part: Flap
Condition: Overspeed
Stage of operation: AP
How discovered: O
Nature of condition: J
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. FLAP OVERSPEED, SUSPECTED FLAPS 10 EXTENDED AT 190 KTS, BUT AIRCRAFT ACCELERATED TO APPROXIMATELY 225 KTS ON FINAL APPROACH. FLAP GAUGE INDICATED FLAPS BLEW-UP TO FLAPS 5, THEN CAME DOWN AGAIN TO FLAPS 10. MAINTENANCE ACCOMPLISHED MCM CARD 05-96-08 AND 31-92-11, NO DEFECTS NOTED.