SDR ASAA2016021815596

Service difficulty report · Warning Message · Boeing 737890

Difficulty date: February 18, 2016
Submitted: February 22, 2016
Operation: Air carrier
Aircraft: N588AS
Make and model: Boeing 737890
Aircraft serial: 35685
Aircraft time: 31,725 hours, 9,651 cycles
Engine: Cfmint CFM567B27
System (JASC): 7720 · Engine Temperature Indicating System
Part: Warning Message
Condition: Out Of Tolerance
Location: Nr 1 Engine
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

NR 1 ENGINE FMC CDU FAULT. "ECONOMIC FAULT" MSG NR 77-10841, EGT SIGNAL, T495S1 IS OUT OF RANGE. ACFT GROUNDED. ACCOMPLISHED EGT CLEANING. PREVALUES: S1-116.39, S2-71.6, S3-76.8, S4-135.7. POST VALUES: S1-48.0, S2-24.3, S3-27.7, S4-60.3. ACCOMPLISHED REPAIR CONFIRMATION, ELECTRONIC ENGINE CONTROL TEST PASSES. THIS CLEARS PLT.