Service difficulty report · Heat Exchanger · Boeing 737890

Difficulty date
September 20, 2019
Submitted
September 25, 2019
Operation
Air carrier
Aircraft
N514AS
Make and model
Boeing 737890
Aircraft serial
35193
Aircraft time
41,837 hours, 12,527 cycles
Part
Heat Exchanger
Part number
453328039
Part serial
YY084006
Condition
Leaking
Location
Nr 2 Engine
Part time
41,883 hours, 12,541 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

DURING PDC INSPECTION FOUND #2 ENGINE DRIPPING FUEL FROM MAIN OIL/FUEL HEAT EXCHANGER PAD DRAIN. GROUNDED - YES. REFERENCING AMM 71-71-00-200-801-F00 - ENGINE VENTS AND DRAINS INSPECTION - THE LEAK RATE IS WITHIN LIMITS FOR DISPATCH (4 DRIPS/MIN, LIMIT IS 90). THE HEAT EXCHANGER MUST BE REPLACED WITHIN 25 FLIGHT CYCLES. REMOVED AND REPLACED #2 ENGINE MAIN OIL/FUEL HEAT EXCHANGER PER AMM 79-21-02. GROUND VERIFICATION AND LEAK CHECKS GOOD.