SDR ASAA0954386

Service difficulty report · Oil System · Boeing 737890

Difficulty date: February 8, 2009
Submitted: February 12, 2009
Operation: Air carrier
Aircraft: N566AS
Make and model: Boeing 737890
Aircraft serial: 35181
Aircraft time: 8,238 hours, 2,637 cycles
System (JASC): 4990 · APU Oil System
Part: Oil System
Condition: Faulted
Location: Apu
Stage of operation: IN
How discovered: V
Nature of condition: J
Precautionary procedure: K

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

What was found

FOUND APU LUBE FILTER DELTA "P" BUTTON EXTENDED. APU LUBE FILTER DIFFERENTIAL PRESSURE INDICATOR HAS HISTORY OF INDICATOR FOUND EXTENDED WITH FILTER FOUND CLEAN. GROUNDED YES. REMOVED APU LUBE FILTER INSPECTED AND FOUND NO CONTAMINANTS IN FILTER OR BOWL. INSTALLED NEW FILTER RAN APU OPS CKD GOOD. NO LEAKS NOTED REF AMM 49 91 21. R&R APU LUBE FILTER DEFERENTIAL PRESSURE INDICATOR AND FILTER BOWL ASSY AS PER MM 49 91 13 400 802 MM 49 91 12 400 802.