SDR CALA2020102301201

Service difficulty report · Aoa · Boeing 737824

Difficulty date: October 23, 2020
Submitted: October 23, 2020
Operation: Air carrier
Aircraft: N17245
Make and model: Boeing 737824
Aircraft serial: 28955
Aircraft time: 66,268 hours, 23,789 cycles
System (JASC): 3418 · Stall Warning System
Part: Aoa
Part number: 0861FL1
Part serial: 0998
Condition: Failed
Part time: 69,661 hours, 24,823 cycles
Stage of operation: CL
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

CREW REPORTS CAPT'S STALL WARNING GOING OFF TOO EARLY. DFCS TEST FAULTS SMYDC-1. BITE TEST OF SMYD-1 FAULTS AOA SIGNAL ERROR 27-31004, REF FIM 27-32-00-810-809. SENSOR ON ORDER. M&E 29-3412-9-0001. REPLACED ANGLE OF ATTACK SENSOR, PER AMM 34-21-05-400-801 ROTABLE PARTS CHANGE WAS INDICATED-TT NR 1043877 SN OFF 0998 IPC REFERENCE NR 34-21-05-01 SENSOR, ANGLE O OFF 29-3412-9-0001 8988 ON 29-3412-9-0001 4359 PERFORMED TAKEOFF WARNING SYSTEM TEST, REF 31-51-00-700-803-C1. OPERATIONS CHECK GOOD.