# SDR ASAA2019061769711

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 16, 2019
- Submitted: June 17, 2019
- Operation: Air carrier
- Aircraft: [N492AS](https://openairdocs.org/aircraft/N492AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44110
- Aircraft time: 14,341 hours, 4,724 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Indicator
- Condition: Tripped
- Location: Apu Oil Filter
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019061769711

## Discrepancy

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.

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