# SDR ASAA2017061421072

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 14, 2017
- Submitted: June 15, 2017
- Operation: Air carrier
- Aircraft: [N491AS](https://openairdocs.org/aircraft/N491AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44109
- Aircraft time: 6,317 hours, 2,159 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Filter
- Part number: 38809381
- Condition: Clogged
- Location: Apu
- 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/ASAA2017061421072

## Discrepancy

FOUND RED BUTTON EXTENDED ON THE FILTER INDICATOR LUBE HOUSING ON APU DURING A GENERAL VISUAL IAW TASK CARD N8349002.  ACFT GROUNDED.  COMPLIED WITH T/C N8349002 STEP 3. OIL FILTER INDICATOR SERVICING IAW AMM 49-91-13,  MAGNETIC DRAIN PLUG INSPECTED TASK AMM 49-91-81.  REMOVED & REPLACED LUBE FILTER ELEMENT IAW AMM 49-91-12 AND REPLACED INDICATOR DIFF PRESSURE ON LUBE FILTER HOUSING. RAN APU FOR LEAK CHECK, NO DEFECTS NOTED.

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