SDR ASAA2019021728257

Service difficulty report · Egt Indication · Boeing 737890

Difficulty date: February 17, 2019
Submitted: February 22, 2019
Operation: Air carrier
Aircraft: N581AS
Make and model: Boeing 737890
Aircraft serial: 35188
Aircraft time: 45,145 hours, 13,495 cycles
System (JASC): 7722 · Engine EGT/TIT Indicating System
Part: Egt Indication
Condition: Out Of Limits
Location: Nr 1 Engine
Stage of operation: IN
How discovered: O
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 T/C 78273000 FOUND #1 ENGINE FAULT , MSG # 77-20871, TOP LEFT EGT SIGNAL (T495S4) IS OUT OF RANGE. GROUNDED - YES. COMPLETED B737-800 FIM 77-21 TASK 804, CLEANED #1 ENG EGT CONNECTORS IAW B737-800 AMM 77-21-00 & 70-70-01. POST ENGINE RUN EEC SHOWED NO FAULTS IAW B737-800 AMM 73-21-00. #1 ENGINE T495 PRECLEAN TEMPS : S1=19.49, S2=19.13, S3=19.27, S4=20.44 #1 ENGINE T495 POST CLEAN TEMPS: S1=20.20, S2=19.70, S3=20.08, SSR=20.48 FAULT MSG 77-20871 NOT ACTIVE ; NO FURTHER ACTION REQD.