# SDR UIEA2018042000748

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 2018
- Submitted: April 23, 2018
- Operation: Air carrier
- Aircraft: [N1997A](https://openairdocs.org/aircraft/N1997A), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 27310
- Aircraft time: 93,408 hours, 18,593 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Module
- Part number: 38850811
- Part serial: R20131609
- Condition: Malfunctioned
- Location: Apu
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2018042000748

## Discrepancy

APU FAULT MESSAGE DISPLAYED.   INSPECTED APU INLET SCREEN, NO FINDINGS, CHECKED PRESSURE SUPPLY TUBE FOR THE SURGE CONTROL VALVE, NO FINDINGS IAW AMM 49-00-00,  REMOVED AND REPLACED THE APU FLOW SENSING MODULE IAW AMM 49-53-08, OPS CHECKED GOOD.

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