Service difficulty report · Computer · Boeing 737824

Difficulty date
July 8, 2023
Submitted
July 10, 2023
Operation
Air carrier
Aircraft
N24212
Make and model
Boeing 737824
Aircraft serial
28772
Aircraft time
74,775 hours, 27,281 cycles
Part
Computer
Part number
285A10106
Part serial
D02050
Condition
Inoperative
Location
Sta 396
Part time
67,707 hours, 23,444 cycles
Stage of operation
CR
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

CAPTS SIDE SPD LIM FLAG DISPLAYED, CAPT SIDE FLT DIR PITCH BAR INTERMITTENT, INTERMITTENT STICK SHAKER ACTIVATION AND INTERMITTENT PITCH LIMIT INDICATION DISPLAYED. ALL AIRSPEEDS MATCHED UP. DISPLAYED. MX MSG. 27-31004. ATTEMPTED TO READ LEFT AOA ANALOG INPUTS ON SMYD#1 AND "AOA INVALID" IS DISPLAYED. PIC OF FAULT UPLOADED. INTERROGATED DFCS BITE. CHANNEL A SHOWED LAST FLIGHT LEG WITH REMOVED AND REPLACED LEFT AOA SENSOR REF. L/P 5108332. NO HELP. FAULT "V/S ENG* HDG SEL MIN OP SPD INVALID". SHOWING SUSPECT LRU REF FIM TASK 27-32 TASK 809. REQUIRES FURTHER T/S. AS "SMYD-1". PIC OF FAULT UPLOADED. ALSO PERFORMED BITE OF SMYD#1 AND HAVE FAULT "AOA SIG ERROR" ON EXISTING FAULTS REMOVED AND REPLACED #1 SMYD COMPUTER IAW AMM FIM 27-32 809, AMM 27-32-42-400-801 AND STALL MANAGEMENT YAW DAMPER (SMYD) BITE TEST AMM 27-32-00-740-803 OPS CHECKS GOOD AT HIS TIME. NO FAULTS PRESENT. PARTS USED: 59-2732-9-0001,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1817572 SN OFF 2050 COMPUTER, STALL OFF 59-2732-9-0001 2050 ON 59-2732-9-0001 2295