Service difficulty report · Heat Exchanger · Boeing 737890

Difficulty date
September 8, 2019
Submitted
September 10, 2019
Operation
Air carrier
Aircraft
N558AS
Make and model
Boeing 737890
Aircraft serial
35177
Aircraft time
50,190 hours, 14,803 cycles
Part
Heat Exchanger
Part number
453328039
Part serial
YB028412
Condition
Leaking
Location
Nr 2 Engine
Part time
50,197 hours, 14,805 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 DRIPPING FUEL FROM BOTTOM OF COWLING. GROUNDED - YES. PERFORMED OPS CHECK OF #2 ENG VENTS & DRAINS, REF AMM 71-71-00. FOUND MAIN OIL/FUEL HEATER EXCHANGER PAD DRAIN DRIPPING FUEL AT 11 DPM. WITHIN DEFERRABLE LIMITS. MAIN OIL/ FUEL HEATER EXCHANGER TO BE REPAIRED WITHIN 25 FLIGHT CYCLES. REMOVED AND REPLACED MAIN OIL/FUEL HEAT EXCHANGER REF AMM 79-21-02. LEAK CHECK GOOD. NO LEAKS NOTED AT THIS TIME. THIS CLEARS THE PLT.