Service difficulty report · Heat Exchanger · Boeing 737990ER

Difficulty date
May 30, 2023
Submitted
June 5, 2023
Operation
Air carrier
Aircraft
N409AS
Make and model
Boeing 737990ER
Aircraft serial
41733
Aircraft time
37,282 hours, 11,870 cycles
Part
Heat Exchanger
Part number
453328039
Part serial
YB042925
Condition
Leaking
Location
Nr 2 Engine Fuel
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 ENG FUEL LEAK FROM HEAT EXCHANGER. GROUNDED - YES. REMOVED MAIN OIL/FUEL HEAT EXCHANGER REF B737-900 AMM 79-21-02-000-801-F00. REPLACED #2 ENG MAIN OIL/FUEL HEAT EXCHANGER REF AMM 79-21-02-400-801-F00. OPS/LEAK CHECK GOOD.