# SDR ASAA2018122827605

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 22, 2018
- Submitted: December 29, 2018
- Operation: Air carrier
- Aircraft: [N492AS](https://openairdocs.org/aircraft/N492AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44110
- Aircraft time: 12,323 hours, 4,157 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Filter
- Part number: 38809381
- Condition: Clogged
- Location: Apu Oil System
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018122827605

## Discrepancy

FOUND BYPASS INDICATOR POPPED ON APU OIL FILTER. GROUNDED - YES. PERFORMED OIL FILTER SERVICING REF B737-900 AMM 49-91-13, PERFORMED MAGNETIC PLUG INSPECTION REF AMM 49-91-81, AND REMOVED AND REPLACED APU OIL FILTER REF AMM 49-91-13, NO FURTHER DEFECTS NOTED, A/C OK FOR SERVICE, RUN APU WITH NO ISSUES.

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