Service difficulty report · Hmu · Boeing 737990ER

Difficulty date
September 8, 2020
Submitted
September 11, 2020
Operation
Air carrier
Aircraft
N433AS
Make and model
Boeing 737990ER
Aircraft serial
41704
Aircraft time
26,574 hours, 8,485 cycles
Engine
Cfmint CFM567B27E
Part
Hmu
Part number
1853M56P16
Part serial
BECWB230
Condition
Leaking
Location
#2 Engine
Part time
26,574 hours, 8,485 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

NR 2 ENGINE FUEL LEAKING FROM COWL DRAIN. GROUNDED - YES. PERFORMED ENGINE VENTS AND DRAINS INSPECTION FOR THE NR 2 ENG, PER B737-900 AMM 71-71-00-200-801. FOUND FUEL DRIPPING FROM NR 2 ENG HMU PAD DRAIN AT 3 DPM. REPLACED NR 2 ENG HMU, PER T/C N8473000 AND N8473001.