Service difficulty report · Thermocouple · Boeing 737824

Difficulty date
December 4, 2019
Submitted
December 7, 2019
Operation
Air carrier
Aircraft
N73251
Make and model
Boeing 737824
Aircraft serial
30582
Aircraft time
62,456 hours, 22,448 cycles
Engine
Cfmint CFM567B262
Part
Thermocouple
Part number
TC29603
Condition
Faulted
Location
Nr 2 Engine
Stage of operation
CL
How discovered
V
Nature of condition
J
Precautionary procedure
A

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

What was found

MULTIPLE EGT EXCEDENCE DURING CLIMB BTWN 10 AND 20000 FEET. NUMBER 2 ENGINE. ACCOMPLISHED FIM TASK 77-21-810-803-F00 FOR THE BOTTOM LEFT EGT SIGNAL (T495S3) AS WELL AS FIM TASK 77-05-00-810-801-F00 FOR THE ENGINE EGT INDICATION. THE BOTTOM LEFT T49.5 PROBE AND TOP RIGHT T49.5 PROBE WERE REPLACED AS PER AMM 77-21-01 PB401 AND REPLACED ENGINE HARNESS CJ10 AND CJ9 AS PER AMM 71-21-06 PB 401, OPS CHECKS GOOD. RAN THE ENGINE FOR 5 MINUTES AS PER AMM 71-00-00-800-807-F00 ALL INDICATIONS NORMAL. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1072248 SN OFF 8731 TT # 1043728 SN OFF 2835 IPC REFERENCE # 77-21-00 PROBE, THERMOCO OFF 29-7721-9-9001 2835 ON 29-7721-9-9001 2009 PROBE, THERMOCO OFF 29-7721-9-9001 8731 ON 29-7721-9-9001 4556