# SDR ASAA2022090539823

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 5, 2022
- Submitted: September 7, 2022
- Operation: Air carrier
- Aircraft: [N538AS](https://openairdocs.org/aircraft/N538AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 41188
- Aircraft time: 37,273 hours, 10,864 cycles
- System (JASC): [4970 · APU Indicating System](https://openairdocs.org/jasc/4970)
- Part: Memory Device
- Part number: 38762871
- Part serial: AGE16308
- Condition: Faulted
- Location: Apu
- Part time: 7,083 hours, 12,405 cycles
- 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/ASAA2022090539823

## Discrepancy

APU BITE SHOWS FAULT CODE 49-72101 LAST 18 STARTS. GROUNDED - YES. REMOVED AND REPLACED DATA MEMORY MODULE IAW B737-800 AMM 49-72-11.

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