SDR ASAA2017103122439

Service difficulty report · Fault Message · Boeing 737890

Difficulty date: October 31, 2017
Submitted: November 30, 2017
Operation: Air carrier
Aircraft: N584AS
Make and model: Boeing 737890
Aircraft serial: 35682
Aircraft time: 38,725 hours, 11,528 cycles
Engine: Cfmint CFM567B27B3
System (JASC): 7720 · Engine Temperature Indicating System
Part: Fault Message
Condition: Illuminated
Location: Nr 2 Engine
Stage of operation: IN
How discovered: 9
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

WHILE PERFORMING T/C 78273000, FOUND A FAULT MESSAGE 77-20872 FOR THE NR 2 ENGINE. THE TOP LEFT EGT SIGNAL IS OUT OF RANGE. ECONOMIC FAULT. ACFT GROUNDED. ACCOMPLISHED TROUBLESHOOTING FOR THE NR 2 ENGINE FAULT 77-20872 IAW FIM 77-21, TASK 804, EEC BITE SHOWED FAULT LOGGED FOR FOUR OUT OF THE LAST TEN STARTS. ACCOMPLISHED EGT CONNECTOR CLEANING IAW AMM 77-21-00-140-801, ALL CONNECTORS IN TABLE 2 CLEANED AND INSPECTED. NO DEFECTS NOTED. ACCOMPLISHED A NR 2 ENGINE EEC TEST IAW AMM 73-21-00-700-804-F00 - ALL TESTS PASSED.