# SDR ASAA2019102541101

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 24, 2019
- Submitted: October 25, 2019
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 42,943 hours, 12,801 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Button
- Condition: Missing
- Location: Indicator
- Component: Indicator
- Component part number: 38810521
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019102541101

## Discrepancy

APU OIL FILTER INDICATOR BUTTON MISSING. GROUNDED - YES. REMOVED & REPLACED APU OIL FILTER BOWL & INDICATOR PER B737-800 AMM 49-91-13. INSTALLED NEW FILTER. NO CONTAMINATION FOUND ON OLD FILTER. APU OIL FILTER BOWL AND INDICATOR LEAK CHECK GOOD REF AMM 49-91-13-401.

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