Service difficulty report · Warning Light · Boeing 737890

Difficulty date
August 7, 2016
Submitted
August 9, 2016
Operation
Air carrier
Aircraft
N527AS
Make and model
Boeing 737890
Aircraft serial
35694
Aircraft time
26,895 hours, 8,751 cycles
Part
Warning Light
Condition
False Activation
Location
Speed Trim
Stage of operation
NR
How discovered
9
Nature of condition
N
Precautionary procedure
O

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

What was found

SPEED TRIM FAIL LIGHT ILLUMINATED ON RECALL. ACFT GROUNDED. ACCOMPLISHED DFCS FLT FAULT REVIEW, IAW FIM 22-11 TASK 801, LEG 1 A SIDE LOGGED 22-11700, LEG 1 B SIDE LOGGED 22-11182. ACCOMPLISHED FIM 22-12 TASK 805, PITCH CWS FORCE TRANSDUCER CAPT, AND FIM 22-13 TASK 813, STAB TRIM CUTOUT RELAY PROBLEM, ALL OPS NORMAL. ACCOMPLISHED STAB/SPEED TRIM SYSTEM TEST DFCS GRP 14.32, IAW AMM 22-11-00, ALL OPS CHECKED NORMAL, DFCS CURRENT STATUS PASS BOTH SIDES. UNABLE TO DUPLICATE DEFECT.