SDR ASAA2015121714305

Service difficulty report · Egt Indication · Boeing 737890

Difficulty date: December 17, 2015
Submitted: December 22, 2015
Operation: Air carrier
Aircraft: N564AS
Make and model: Boeing 737890
Aircraft serial: 35103
Aircraft time: 35,176 hours, 10,783 cycles
System (JASC): 7720 · Engine Temperature Indicating System
Part: Egt Indication
Condition: False Indication
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

DURING ACCOMPLISHMENT OF TC 78273000, FOUND FAULT CODE 77-20871 EGT SIGNAL, T495S4, IS OUT OF RANGE. ACFT GROUNDED. ACCOMPLISHED FIM 77-21, TASK 804. FAULT IS NO LONGER PRESENT. ACCOMPLISHED ELECTRONIC ENGINE CONTROL TEST, REF AMM 73-21-00-700-804-F00. FAULT DID NOT RETURN.