# SDR UIEA2019082955285

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 25, 2019
- Submitted: August 29, 2019
- Operation: Air carrier
- Aircraft: [N1439A](https://openairdocs.org/aircraft/N1439A), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 28495
- Aircraft time: 70,118 hours, 16,414 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Pressure Switch
- Part number: ASP4550
- Part serial: E051393
- Condition: Failed
- Location: Apu
- Stage of operation: TX
- 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/UIEA2019082955285

## Discrepancy

APU FAULT, SHUTDOWN DURING POWER TRANSFER. BIT CHECKED THE APU ECU AND FOUND IT WAS FLAGGING LOW OIL PRESSURE IAW FIM 49-11 FT 987.     REMOVED AND REPLACED APU LOW OIL PRESSURE SWITCH, IAW AMM 49-94-02. OPS CHECKED OK. CLEARED APU FAULT AND DOOR STATUS FAULT.

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