Service difficulty report · Wire Harness · Boeing 737890

Difficulty date
November 20, 2019
Submitted
November 27, 2019
Operation
Air carrier
Aircraft
N588AS
Make and model
Boeing 737890
Aircraft serial
35685
Aircraft time
45,661 hours, 13,709 cycles
Engine
Cfmint CFM567B27
Part
Wire Harness
Part number
3250434020
Condition
Faulted
Location
Nr 1 Engine
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

WHILE PERFORMING T/C 78273000 FOUND ECONOMIC TERM FAULTS ON THE #1 ENG, FAULTS 75-10411/75-20411(THE HPTACC POSITION SIGNALS DISAGREE). ALSO HAS HISTORY OF ECONOMIC TERM FAULTS 75-20461/75-10461(THE HPTACC DEMAND AND POSITION SIGNALS DISAGREE), 75-10361(THE HPTACC POSITION SIGNAL IS OUT OF RANGE) AND 75-30411(THE HPTACC POSITION SIGNALS DISAGREE). PLT DEFERRAL FOR ECONOMIC FAULT 500 FLT HRS. GROUNDED - YES. PERFORMED B737-800 FIM 75-21 TASK 802 UPON INSPECTION FOUND J9 HARNESS OUT OF LIMITS. REPLACED J9 HARNESS ON ENG #1 REF B737-800 AMM 73-21-06-000-802-F00. AFTER REPLACEMENT OF J9 HARNESS COMPLETED FIM TASK. ALL TESTS PASSED. FAULT IS NOT IN CURRENT. THIS MTX ACTION CLEARS THIS PLT.