Service difficulty report · Thermocouple · Boeing 737724

Difficulty date
June 28, 2019
Submitted
June 30, 2019
Operation
Air carrier
Aircraft
N38727
Make and model
Boeing 737724
Aircraft serial
28797
Aircraft time
65,074 hours, 22,182 cycles
Engine
Cfmint CFM567B242
Part
Thermocouple
Part number
TC29604
Condition
Malfunctioned
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

EGT EXCEED 965 DEGREEES AFTER TAKEOFF. EGT NORM AFTER THROTTLE R ETARDED PER CREW VERBAL, # 2 ENGINE. BY VERBAL FROM CREW AIRCRAFT WAS NOT IN AN OVERWEIGHT CONDITION AT LANDING. 73-10322, 77-20862, 77-20872, 75-10362, 775-30412, 77-20872, 75-20462, AND 75-30412. REF AMM 71-00-00-800-804-F00 FOR UPON RETURN PERFORMED EEC BITE CHECK ON ENGINE 2, MESSAGES; INSPECTION AFTER ENGINE OPERATIONS ABOVE THE LIMITS AND HIGH ENGINE STRESS. INTERROGATED ENG EXCEEDANCE PAGE OF FMCS, PER AMMTASK 71-00-00-7 NG CLIMB, ALT-3224FT IAS-160KNTS, N1 & N2 SHOWED NO EXCEEDANCES. 40-801-F00,#2 ENG HAD EGT EXCEEDANCE OF 967DEG C FOR 45SEC DURRI #2 ENG EGT WIRING CHECKS GOOD DURNING RING OUT PER REF TASK AMM 77-21-01-200-801-F00. ADD EMP:6092 AMOUNT OF TIME DURING CLIMB IS AN AREA D EXCEEDANCE. AVIONICS VERIFIED EGT INDICATION SYSTEM CHECKS GOOD AND ITS NOT THE CAUSE OF THE EXCEEDANCE. PER STEP F TASK 8. IF AN EXCEEDANCE IS NOT ADD EMP:U348945 71-00-00-800-804-F00. AN EGT EXCEEDENCE OVER 950C FOR ANY T/S PER FIM 71-06-00-810-805-F00 LED TO AMM DUE TO AN EGT INDICATION SYSTEM ISSUE, REPLACE ENGINE. IN REF OF EGT NEED TO FOLLOW AMM 71-00-00-800-804-FOO FIG 603 FOUND TO BE IN ARE B WILL FOLLOW ECRA 7700-0049 MM77-21-01-400-801-F00 UP TO PARA. F(2)(M). REPLACED #2 ENG. UPPER LEFT AND LOWER LEFT T49.5 PROBES IAW TT # 1185973 SN OFF 1740