Service difficulty report · Heat Exchanger · Boeing 737990ER

Difficulty date
April 3, 2021
Submitted
April 8, 2021
Operation
Air carrier
Aircraft
N431AS
Make and model
Boeing 737990ER
Aircraft serial
43255
Aircraft time
27,799 hours, 8,974 cycles
Engine
Cfmint CFM567B27E
Part
Heat Exchanger
Part number
453328039
Part serial
YB043538
Condition
Leaking
Location
Nr 2 Engine
Part time
27,844 hours, 8,992 cycles
Stage of operation
IN
How discovered
V
Nature of condition
K
Precautionary procedure
K

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

What was found

FOUND FUEL DRIP ON #2 ENG FUEL OIL HEAT EXCHANGER DRAW LINE. GROUNDED - YES. REMOVED AND REPLACED FUEL OIL HEAT EXCHANGER REF B737-900 AMM 79-21-02 PERFORMED ENGINE RUN FOUND SERVO FUEL HEATER LEAKING REF L/P 60093288 FOR REMOVE AND REPLACEMENT.