SDR ASAA2015120514116

Service difficulty report · Engine · Boeing 737890

Difficulty date: December 5, 2015
Submitted: December 9, 2015
Operation: Air carrier
Aircraft: N570AS
Make and model: Boeing 737890
Aircraft serial: 35185
Aircraft time: 33,643 hours, 10,002 cycles
System (JASC): 7720 · Engine Temperature Indicating System
Part: Engine
Condition: Faulted
Stage of operation: IN
How discovered: 9
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 ACCOMPLISHING TASK CARD 78273000, FOUND ECONOMIC FAULT 77-20861 BOTTOM LT EGT SIGNAL IS OUT OF RANGE NR 1 ENGINE. ACFT GROUNDED. CLEANED EGT HARNESS AND INSPECTED IAW FIM 77-21, TASK 803 BOTTOM LT EGT SIGNAL IS OUT OF RANGE-FAULT ISOLATION. ELECTRONIC ENGINE CONTROL TEST, PASSED. T49.5 SECTOR INDICATIONS PRE-CLEANING: 1-129.00, 2-90.87, 3-95.62, 4-137.62. POST CLEANING: 1-40.37, 2-21.37, 3-25.75, 4-40.62. NO FAULTS.