SDR AALA202002059020

Service difficulty report · Computer · Boeing 737823

Difficulty date: February 4, 2020
Submitted: February 5, 2020
Operation: Air carrier
Aircraft: N918AN
Make and model: Boeing 737823
Aircraft serial: 29519
Aircraft time: 60,642 hours, 24,802 cycles
System (JASC): 3414 · Airspeed/Mach Indicator
Part: Computer
Condition: Faulty
Location: Air Speed
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: DIVERTED TO TUL ACCOUNT AIR SPEED LIMIT WARNING INDICATION. AN EMERGENCY WAS DECLARED. AFTER TAKEOFF SPD LIM AMBER MESSAGE DISPLAYED ON CAPT PFD FLASHED ON AND OFF DURING FLIGHT WITH BARBER POLE RISING UP CLOSE TO CURRENT AIRSPEED FO SIDE NORMAL. REMOVED AND REPLACED #1 SMYD (STALL MANAGEMENT & YAW DAMPER COMPUTER) IAW AMM 27-32-42. ALSO SEE AALA202002059018, AALA202002059021.