Service difficulty report · Thermocouple · Boeing 737824

Difficulty date
September 16, 2019
Submitted
September 17, 2019
Operation
Air carrier
Aircraft
N37298
Make and model
Boeing 737824
Aircraft serial
34004
Aircraft time
45,229 hours, 16,315 cycles
Part
Thermocouple
Part number
TC29603
Condition
Out Of Tolerance
Location
Nr 2 Engine
Stage of operation
CL
How discovered
O
Nature of condition
N
Precautionary procedure
A

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

What was found

NUM 2 ENGINE OVERHEAT ON CLIMBOUT FROM 8000 AIRPLANE CLEAN CONFIG N1 MAX OF 92 AT 17000. ENGINE EXCEEDANCE PEAKED AT 966 FOR 2 SECONDS. EEC BITE CHECK OF SIGNAL OUT OF RANGE (T495S3). INPUT MONITORING OF T495S3 ON CHANNEL B SHOWS 400 DEGREES HIGHER THAN ANY OF THE OTHER PROBES. NUMBER 2 ENGINE REVEALED MESSAGE 77-20862, THE BOTTOM LEFT EGT IPC 77-21-01-01 ITEM 130. THERMOCOUPLE PROBE, M&E 29-7721-9-9001 NEEDED, 1EA ON HAND. REF ACCOMPLISHED POWER ASSURANCE CHECK PER AMM 71-00-00-700-813-F00. #2 ENG EGT WITHIN LIMITS @ 65% WITH 570C EGT AND OAT @ 20C, AND %N1 TARGET @ 65.6 %.