Service difficulty report · Valve · Boeing 737824

Difficulty date
September 11, 2017
Submitted
September 11, 2017
Operation
Air carrier
Aircraft
N37274
Make and model
Boeing 737824
Aircraft serial
31592
Aircraft time
52,787 hours, 17,613 cycles
Engine
Cfmint CFM567B262
Part
Valve
Part number
32911866
Part serial
3984
Condition
Faulty
Location
Nr 2 Engine
Part time
29,366 hours, 10,150 cycles
Stage of operation
CL
How discovered
O
Nature of condition
M, J
Precautionary procedure
A

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

What was found

NR 2 ENGINE EGT OVER RED LINE. EMERGENCY DECLARED. ACCOMPLISHED BOROSCOPE INSPECTION OF THE NR 2 ENGINE HPT AND LPT STAGES 1 THRU 3 BLADES, NO DEFECTS NOTED IAW AMM 72-00-00-200-807-F00, AND 72-00-00-200-808-F00. REMOVED AND CLEANED ALL T49.5 THERMOCOUPLES AND CONNECTORS IAW MM 77-21-01. REPLACED HPTACC DUE TO MAINTENNACE MESSAGE 75-30412. IAW FIM 75-21-00-810-803-F00, AMM 75-21-01-000-801, AND 75-21-01-400-801, OPS AND LEAK CHECKED GOOD. ACCOMPLISHED PNEU LEAK CHECK IAW AMM 71-00-00-700-809-F00, ALL CHECKED GOOD. ACCOMPLISHED A POWER ASSURANCE RUN IAW TEST 5 71-00-00-700-813-F00 AT 65 PERCENT N1, EGT IS 594, AT 70 PERCENT N1, EGT IS 628, AT 75 PERCENT N1, EGT IS 670. ALL TEMPS WITHIN LIMITS. EEC BITE TESTED IAW 73-00 TASK 801, GOOD.