Service difficulty report · Heat Exchanger · Boeing 737823

Difficulty date
October 13, 2021
Submitted
October 15, 2021
Operation
Air carrier
Aircraft
N947NN
Make and model
Boeing 737823
Aircraft serial
31190
Aircraft time
22,713 hours, 8,881 cycles
Engine
Cfmint CFM567B242
Part
Heat Exchanger
Part number
3017807040
Part serial
YP028181A
Condition
Unserviceable
Location
Zone 400 - Nac/P
Part time
58,537 hours, 24,081 cycles
Stage of operation
CR
How discovered
V
Nature of condition
J
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: DURING CRUISE AT FL 350 NUMBER TWO ENGINE REDUCED TO IDLE. OTHER INDICATIONS NORMAL EXCEPT OIL TEMPERATURE ROSE INTO CAUTION ZONE. ENGINE INDICATION FAILED TO RESPOND TO THROTTLE MOVEMENT. CREW SHUTDOWN ENGINE, DECLARED AN EMERGENCY AND DIVERTED TO IAH LANDING SAFELY. **SUPPLEMENTAL REPORT FOR AALA202110143275: CORRECTED FAULTY ENGINE TO NUMBER 2. MAINTENANCE REPLACED FUEL PUMP (AALA202110143275) PER AMM MM 73-11-01. REPLACED HYDROMECHANICAL UNIT (AALA202110158750) PER JOB CARD 08L40073001. REPLACED OIL/FUEL HEAT EXCHANGER (AALA202110153208) PER AMM 79-21-02. REPLACED SERVO FUEL HEATER (AALA202110152318) PER AMM 73-11-07. OPERATIONAL AND LEAK CHECKS GOOD.** (CLOSED)