Service difficulty report · Engine · Boeing 737990ER

Difficulty date
September 19, 2020
Submitted
September 28, 2020
Operation
Air carrier
Aircraft
N419AS
Make and model
Boeing 737990ER
Aircraft serial
41734
Aircraft time
28,216 hours, 9,084 cycles
Engine
Cfmint CFM567B27E
Part
Engine
Condition
Faulted
Stage of operation
IN
How discovered
V
Nature of condition
J
Precautionary procedure
K

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

What was found

REF T/C 78273000 NR 2 ENGINE SHOW SHORT TIME FAULT 75-30802 "T25 SIGNAL DISAGREE". GROUNDED-YES. FAULT NOT CURRENTLY ACTIVE. FAULT ONLY PRESENT IN HISTORY ON LEG 10. AIRCRAFT HAS FLOWN 9 LEGS SINCE T25 REPLACEMENT. SHORT TIME FAULT REPORTED 2 DAYS AFTER T25 REPLACEMENT. HISTORY WAS NOT CLEARED WHEN FAULT WAS CORRECTED. J9 HARNESS ON NR 2 ENGINE ALREADY REPLACED ON 09/06/2020 FOR DIFFERENT FAULT. T25 SENSOR WAS REPLACED 09/17/2020 AND CLEARED 2 SEPARATE FAULTS SO WAS SIGNED OFF TWICE, SENSOR WAS NOT REPLACED TWICE INSIDE OF 18 MONTHS OF HISTORY. EEC FAULT HISTORY HAS NOW BEEN CLEARED. THIS CLEARS PLT.