SDR ASAA2014090809085

Service difficulty report · Probe · Boeing 737890

Difficulty date: September 8, 2014
Submitted: September 12, 2014
Operation: Air carrier
Aircraft: N533AS
Make and model: Boeing 737890
Aircraft serial: 35201
Aircraft time: 14,553 hours, 4,378 cycles
Engine: Cfmint CFM567B27
System (JASC): 7720 · Engine Temperature Indicating System
Part: Probe
Part number: TC29604
Condition: Dirty
Location: Nr 2 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 2 ENGINE, WHILE PERFORMING FMC-CDU, FOUND ECONOMIC FAULT CODE 77-20860, THE BOTTOM LT EGT SIGNAL IS OUT OF RANGE. FLT LEG 1 TO 2. ACFT GROUNDED. PERFORMED EGT CLEAN ON NR 2 ENGINE OF T49.5 CONNECTOR IAW AMM 70-70-01-200-801-F00. T49.5 S3 EGT SENSOR READ NORMAL RANGE REF:FIM 77-21, TASK 803 & AMM 77-21-00. PERFORMED NR 2 ENGINE EEC TEST "NO FAULTS" REF: FIM 77-21, TASK 803 & AMM 73-21-00.