# SDR ASAA2014071808603

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 18, 2014
- Submitted: July 22, 2014
- Operation: Air carrier
- Aircraft: [N423AS](https://openairdocs.org/aircraft/N423AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35206
- Aircraft time: 4,859 hours, 1,547 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Filter Element
- Part number: 38809381
- Condition: Abnormal
- Location: Apu
- 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/ASAA2014071808603

## Discrepancy

DURING SERVICE CHECK, FOUND APU DELTA "P" INDICATOR FOR APU OIL FILTER POPPED. ACFT GROUNDED.  ACCOMPLISHED APU OIL FILTER DELTA "P" INDICATOR FILTER REPLACEMENT REF MM 49-91-13, NO FAULTS FOUND.

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