Service difficulty report · Probe · Boeing 737890

Difficulty date
September 1, 2011
Submitted
September 6, 2011
Operation
Air carrier
Aircraft
N577AS
Make and model
Boeing 737890
Aircraft serial
35186
Aircraft time
16,942 hours, 5,122 cycles
Engine
Cfmint CFM567B27
Part
Probe
Part number
TC29603
Condition
Defective
Location
Nr 2 Engine
Stage of operation
CL
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

NR 2 ENGINE EGT FLUCTUATED TWICE ON CLIMB FROM 770 TO 870. ALL OTHER INDICATIONS NORMAL. NO EXCEEDANCES. BITE CHECKED FOR EXCEEDANCES NONE FOUND. BITE CHECKED NR 2 ENG FOR FAULTS FOUND 77 10852 BOTTOM RT EGT SIGNAL OUT OF RANGE FOR 2 LEGS. PERFORMED CLEANING INSPECTION FOR CORROSION OF EGT CONNECTORS. TROUBLESHOOT FOR EGT FAULT. NO CORROSION FOUND REF MM 77 21 00 201. PRECAUTION REMOVED AND REPLACED TOP AND BOTTOM RIGHT EGT PROBES REF MM77 21 01. ACCOMPLISHED EEC TEST AND NR 2 ENGINE IDLE RUN REF MM 73 21 00. OPS NORMAL. S1 S4 READS 30.6 21.5 21.9 30.3 RESPECTIVELY. EGT AT IDLE IS NORMAL AND STABLE.