Service difficulty report · Apu · Boeing 737990ER

Difficulty date
February 2, 2019
Submitted
February 4, 2019
Operation
Air carrier
Aircraft
N471AS
Make and model
Boeing 737990ER
Aircraft serial
41703
Aircraft time
17,345 hours, 5,686 cycles
Part
Apu
Part number
38403103
Part serial
1415610108664
Condition
Oil Consumption
Location
Apu Bay
Part time
4,455 hours, 8,662 cycles
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

APU HAS A HISTORY OF OIL SERVICING CURRENT OIL CONSUMPTION IS HIGHER THAN EXPECTED. GROUNDED - YES. ACCOMPLISHED AMM 49-11-00-400-803 STEPS 7G(2)-(4). GENERATED DISCREPANCY ON MIG-2C 40-0016543 ITEM 3. INSP NR 7. COMPLETED APU INST REF MM 49-11-00-400-803 STEPS 7G(5)-7.O.(1).