Service difficulty report · Heat Exchanger · Boeing 737990ER

Difficulty date
May 31, 2023
Submitted
June 5, 2023
Operation
Air carrier
Aircraft
N477AS
Make and model
Boeing 737990ER
Aircraft serial
40716
Aircraft time
28,608 hours, 8,867 cycles
Part
Heat Exchanger
Part number
453328039
Part serial
YB045686
Condition
Leaking
Location
Nr 2 Eng Fuel
Part time
28,674 hours, 8,890 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

#2 ENGINE HAS FUEL DRIPPING FROM IT. GROUNDED - YES. ACCOMPLISHED IDLE LEAK CHECK AND FOUND FUEL DRIPPING FROM MAIN FUEL/OIL HEAT EXCHANGER AT 9 DPM. REMOVED AND REPLACED #2 ENGINE FUEL/OIL HEAT EXCHANGER IAW B737-900 AMM 79-21-02. LEAK CK GOOD.