Service difficulty report · Warning System · Boeing 737890

Difficulty date
September 6, 2018
Submitted
October 3, 2018
Operation
Air carrier
Aircraft
N569AS
Make and model
Boeing 737890
Aircraft serial
35184
Aircraft time
43,944 hours, 13,463 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

WHILE PERFORMING TASKCARD 78273000, FOUND FAULT CODE 77-20872, NR 2 ENG, THE TOP LEFT EGT SIGNAL IS OUT OF RANGE, ECONOMIC FAULT, DEFERRED PER TASK CARD 78273000. GROUNDED - YES. DEFERRED PER TASKCARD 78273000, DEFERRAL INTERVAL IS 500 FLT HRS. NR 2 ENGINE FAULTS CHECKED: NO RECENT FAULTS OR HISTORY. EEC BITE DONE REF AMM 73-21-00-700-804-F00 WITH NO FAULTS. INPUT MONITORING OF T49.5 PROBES DONE AND WITHIN TOLERANCE REF FIM 77-21 TASK 804 STEP 2. NO HISTORY PAST 30 DAYS. GROUND VERIFICATION SUCCESSFUL. THIS CLEARS THE PLT.