# SDR ASAA2018080125610

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 1, 2018
- Submitted: August 1, 2018
- Operation: Air carrier
- Aircraft: [N589AS](https://openairdocs.org/aircraft/N589AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35686
- Aircraft time: 40,691 hours, 12,290 cycles
- System (JASC): [4970 · APU Indicating System](https://openairdocs.org/jasc/4970)
- Part: Data Unit
- Part number: 38762871
- Part serial: GE4041
- Condition: Failed
- Location: Apu
- Part time: 12,590 hours, 16,616 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018080125610

## Discrepancy

REPORTS OF MX BLUE LIGHT ON WITH OIL LEVEL FOUND FULL AND FAULT CODE 49-72104 FOUND.  GROUNDED - YES. REMOVED AND REPLACED DATA MEMORY MODULE REF AMM 49-72-11. OPS NORMAL.

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