Service difficulty report · Oil Cap · Boeing 737890

Difficulty date
April 13, 2012
Submitted
April 16, 2012
Operation
Air carrier
Aircraft
N557AS
Make and model
Boeing 737890
Aircraft serial
35176
Aircraft time
22,386 hours, 6,672 cycles
Engine
Cfmint CFM567B27
Part
Oil Cap
Part number
38633742
Condition
Leaking
Location
Apu
Stage of operation
TX
How discovered
O
Nature of condition
K, J
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

UPON STARTING THE APU BLUE MAINT LIGHT ILLUMINATED. MAINT MESSAGE LOW QTY. SERVICED APU OIL RE MM 12-13-31. APU HAS HISTORY OF OIL CONSUMPTION. ACFT GROUNDED. ACCOMP APU BITE CHECK GROUND REF FIM TASK 49-60-00-810-801. ACCOMP APU OIL CONSUMP HIGH FAULT ISOLATION REF FIM TASK 49-95-00-810-801: FOUND RESIDUAL OIL AROUND OIL FILL CAP CLEANED AREA. NO ACTIVE LEAK WITH APU RUNNING. APPROX 30 MIN AFTER SHUTDOWN OIL SEEPS FROM FILL CAP. ZERO DRIPS WITHIN 1HR OIL CONSUMPTION WITHIN LIMITS. REPLACED THE APU OIL CAP IAW CMM 49-26-95. LEAK CHECK GOOD.