Service difficulty report · Engine · Boeing 737824

Difficulty date
July 11, 2025
Submitted
July 14, 2025
Operation
Air carrier
Aircraft
N35271
Make and model
Boeing 737824
Aircraft serial
31589
Aircraft time
73,955 hours, 26,281 cycles
Engine
Cfmint CFM567B262
Engine time
72,180 hours, 26,806 cycles
Part
Engine
Condition
Faulted
Location
Nr 2
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

RT ENG OVRHT LIGHT ILLUMINATED ON CLIMBINSPECTED CORE AREA OF #2 ENGINE FOUND CORE UPPER FIRE LOOP TOUCHING SENSE LINE TO PRSOV, ADJUSTED POSITION OF CLAMP, RAN ENGINE. OVERHEAT LIGHT CAME ON AFTER 3 MINUETS AT 85% N1, WENT OUT AFTER THROTTLE BACK TO 83%, THEN BACK ON AT 85%. NEEDS FURTHER TROUBLESHOOTING. APPLIED DEVELOPER ON ALL SUSPECTED AREAS THAT MAY BE LEAKING. CHECKED ENGINE FIRE DETECTION RESISTANCE PER AMM 26-11-00-730-801 ALL IN LIMITS. REPLACED PRECOOLER UPSTREAM DUCT SEAL AND CLAMP AT PRECOOLER DUE TO SUSPECT LEAKS WITH AMM 36-12-01. CHECKED ALL PYLON CONNECTIONS. RAN ENGINE AT 85% FOR 3 MINUTES AND OVERHEAT LIGHT CAME BACK ON WITH AND WITHOUT BLEED SWITCH ON AND WENT OFF AT 80%. AFTER ENGINE RUNS NOTICED SIGNS OF BLEED LEAK AT 5TH STAGE CHECK VALVE. REPLACED BOTH SEALS AND CLAMPS PER AMM 36-11-02. REPLACED UPPER CORE FIRE DETECTION HARNESS WITH AMM 26-11-02. OPS CHECKS GOOD. RAN ENGINE 85%. FOR 3 MINUTES THEN TAKEOFF POWER FOR 1 MINUTE AND OVERHEAT LIGHT CAME NEEDS FURTHER TROUBLESHOOTING FIM 26-10 TASK 811 COMPLETED UP TO STEP D 4. DID NOT COMPLETE ENGINE BLEED AIR SYSTEM HEALTH CHECK. FIM 26-10 TASK 811 COMPLETED THRU ENTIRE ENGINE BLEED AIR SYSTEM HEALTH CHECK. ALL CHECKS TEST STATISFACTORY, NO FAULTS FOUND. REQUIRES FURTHER T/S VERIFIED SEVERIFIED RII REQUIREMENTS HAVE BEEN MET. REMOVED AND REPLACED #2 ENG. OPS AND LEAK CHECKS GOOD. ALSO PERFORMED A POWER ASSURANCE CHECK TEST 5 PER AMM 71-00-00-700-813-F00. CHECKS GOOD. OKAY FOR CONTINUED SERVICE