# SDR ASAA2018030523765

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 2018
- Submitted: March 6, 2018
- Operation: Air carrier
- Aircraft: [N442AS](https://openairdocs.org/aircraft/N442AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43293
- Aircraft time: 17,022 hours, 5,645 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Filter
- Part number: 7590361101
- Condition: Clogged
- Location: Apu
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018030523765

## Discrepancy

FOUND APU OIL FILTER HOUSING INDICATOR RED BUTTON EXTENDED. GROUNDED - YES. REPLACED APU OIL FILTER HOUSING FILTER AND O-RING, REF AMM 49-91-13. OPS CHECKED AND LEAK CHECKED, APU OPS NORMAL, RESET OIL FILTER HOUSING INDICATOR RED BUTTON TO FLUSH, AMM 49-91-13.

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