- Difficulty date
- June 16, 2019
- Submitted
- June 17, 2019
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44110
- Aircraft time
- 14,341 hours, 4,724 cycles
- Part
- Indicator
- Condition
- Tripped
- Location
- Apu Oil Filter
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU LUBE FILTER DELTA-P POPPED. GROUNDED - YES. INSPECTED LUBE FILTER, NO CONTAMINATION NOTED. REPLACED FILTER AND RESET DELTA-P, WHICH POPPED AGAIN DURING LK CK. REPLACED FAULTY LUBE FILTER HOUSING. WORK ACCOMPLISHED PER B737-900 AMM 49-91-12. LK AND OPS CKS GOOD. ETOPS GROUND VERIFICATION SUCCESSFUL.