# SDR ASAA2023030442188

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 4, 2023
- Submitted: March 6, 2023
- Operation: Air carrier
- Aircraft: [N487AS](https://openairdocs.org/aircraft/N487AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44108
- Aircraft time: 27,388 hours, 8,428 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Filter
- Part number: 38809381
- Condition: Clogged
- Location: Apu Lube Module
- 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/ASAA2023030442188

## Discrepancy

REF T/C N8349002, FOUND OIL FILTER INDICATOR RED BUTTON EXTENDED ON APU.  GROUNDED - YES. ACCOMPLISHED OIL FILTER INDICATOR SERVICING PER B737-900 AMM 49-91-13. REMOVED AND REPLACED LUBE FILTER ELEMENT REF AMM 49-91-12 AND INSPECTED MAGNETIC DRAIN PLUG REF AMM 49-91-81, NO PARTICLES FOUND, OPS CK GOOD.

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