Service difficulty report · Heater · Boeing 737823

Difficulty date
March 21, 2025
Submitted
April 1, 2025
Operation
Air carrier
Aircraft
N970NN
Make and model
Boeing 737823
Aircraft serial
31218
Aircraft time
29,003 hours, 12,299 cycles
Engine
Cfmint CFM567B20
Engine time
29,003 hours, 12,299 cycles
Part
Heater
Part number
118411934
Condition
Failed
Location
Engine Oil
Stage of operation
CR
How discovered
V
Nature of condition
G, R, X
Precautionary procedure
E, A

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

What was found

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: NUMBER 1 ENGINE FAIL (COMPRESSOR STALL), ENGINE 1 SHUTDOWN BY CREW IN DESCENT; AIRCRAFT DIVERTED TO AND LANDED SAFELY AT MIA. REMOVED AND REPLACED HMU-HYDROMECHANICAL UNIT (AALA202503240627), PER JC 08L40073001. REMOVE AND REPLACED FUEL PUMP (AALA202504017775), PER AMM 73-11-01. REMOVE AND REPLACED SERVO HEATER (AALA202504011909), PER AMM 73-11-07. REMOVE AND REPLACED MAIN FUEL OIL HEAT EXCHANGERS (AALA202504010096), PER AMM 79-21-02. OPERTIONAL AND LEAK CHECK GOOD.