SDR ASAA2017100722159

Service difficulty report · Sensor · Boeing 737890

Difficulty date: October 7, 2017
Submitted: October 11, 2017
Operation: Air carrier
Aircraft: N530AS
Make and model: Boeing 737890
Aircraft serial: 36578
Aircraft time: 29,242 hours, 8,728 cycles
Engine: Cfmint CFM567B27
System (JASC): 7720 · Engine Temperature Indicating System
Part: Sensor
Condition: Dirty
Location: Nr 2 Engine Egt
Stage of operation: IN
How discovered: O
Nature of condition: N
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

GE DIAGNOSTICS REPORTED THE NR 2 ENGINE TREND DATA SHOWS A SUDDEN DELTA EGT INCREASE AND EGT HDM DECREASE. EGT INDICATION ERRORS ARE SUSPECT. ACFT GROUNDED. ACCOMPLISHED EGT CLEANING IAW AMM 77-21-00-140-801. BEFORE TEMPS: S1/44.39, S2/19.19, S3/18.56, S4/43.64. AFTER TEMPS: S1/25.46, S2/13.91, S3/13.50, S4/25.42. NO DEFECTS NOTED.