Service difficulty report · Warning System · Boeing 737890

Difficulty date
March 31, 2020
Submitted
April 3, 2020
Operation
Air carrier
Aircraft
N563AS
Make and model
Boeing 737890
Aircraft serial
35180
Aircraft time
50,929 hours, 15,112 cycles
Part
Warning System
Condition
False Activation
Location
Cockpit
Stage of operation
IN
How discovered
O
Nature of condition
N
Precautionary procedure
K

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

What was found

FMC CDU FAULTS: ENGINE #1, 73-31741 (DEU 1 LEFT FLAP AND RIGHT FLAP POSITION DATA DISAGREE) SHORT TIME FAULT. ENGINE #1, 73-31751 (DEU 2 LEFT FLAP AND RIGHT FLAP POSITION DATA DISAGREE) SHORT TIME FAULT. ENGINE #2, 73-31742 (DEU 1 LEFT FLAP AND RIGHT FLAP POSITION DATA DISAGREE) SHORT TIME FAULT. ENGINE #2, 73-31752 (DEU 2 LEFT FLAP AND RIGHT FLAP POSITION DATA DISAGREE) SHORT TIME FAULT. GROUNDED - YES. NO MORE FAULTS IN NEW LEGS 1-6. CW B737-800 FIM 73-24 TASK 810 FOUND FCC B FAULT 31-67340 IN HISTORY CW FIM 31-63 TASK 809 FCC B LLM TESTS CHECKED GOOD INTERMITTENT FAULT. COMPLETED REPAIR CONFIRMATION IN FIM 73-24 TASK 810 AND ALL TESTS NORMAL.