Service difficulty report · Valve · Boeing 737890

Difficulty date
May 28, 2020
Submitted
May 28, 2020
Operation
Air carrier
Aircraft
N513AS
Make and model
Boeing 737890
Aircraft serial
35192
Aircraft time
43,951 hours, 13,029 cycles
Engine
Cfmint CFM567B27
Part
Valve
Part number
3404002030
Part serial
YT1352229
Condition
Leaking
Location
Oil System
Part time
39,702 hours, 13,410 cycles
Stage of operation
IN
How discovered
O
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

DUE TO RECENT REPORT OF 7 QUARTS OIL ADD TO THE NR 2 ENGINE WHILE THE A/C IS IN STORAGE. IT IS SUSPECTED THAT THE ENGINE MAY BE OVER-SERVICED DUE TO A LEAKING ANTI-LEAK VALVE AND LUBE UNIT SCAVENGE ABILITY. GROUNDED - YES. REMOVED AND REPLACED OIL ANTI-LEAK VALVE REF AMM 79-21-09 ON NR 2 ENGINE. LEAK CHECK GOOD.