# SDR ASAA2013013193803

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2013
- Submitted: February 4, 2013
- Operation: Air carrier
- Aircraft: [N538AS](https://openairdocs.org/aircraft/N538AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 41188
- Aircraft time: 2,820 hours, 832 cycles
- System (JASC): [4970 · APU Indicating System](https://openairdocs.org/jasc/4970)
- Part: Module
- Part number: 38762871
- Part serial: GE2283
- Condition: Malfunctioned
- Location: Apu
- Part time: 2,795 hours, 4,440 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/ASAA2013013193803

## Discrepancy

MX CONTROL REPORTS APU SN INCORRECT ON CDU.  APU CT5ATP DATA IS BEING RECORDED UNDER CORRECT APU SN AND VALID TEMP DATA IS BEING RECORDED.  R & R APU DMM IAW AMM REF 49-72-11-000-801/49-72-11-400-801.  OPS CKS GOOD.

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