# SDR UIEA2020061521279

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 10, 2020
- Submitted: June 15, 2020
- Operation: Air carrier
- Aircraft: [N1373A](https://openairdocs.org/aircraft/N1373A), registered now
- Make and model: Boeing 767-31K
- Registry model: [Boeing 767-31K](https://openairdocs.org/model/boeing-767-31k) (OpenAirDocs)
- Aircraft serial: 27205
- Aircraft time: 101,844 hours, 21,429 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Relay
- Part number: BACR13CF2A
- Part serial: NSN
- Condition: Failed
- 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/UIEA2020061521279

## Discrepancy

AFTER LANDING, ATTEMPTED TWO APU STARTS.  EACH ATTEMPT RECEIVED APU FAULT MESSAGE.  REMOVED AND REPLACED APU DOOR ACTUATOR IAW AMM 49-15-06.  NO FIX.    UPON OPERATIONAL TEST FOUND CIRCUIT BREAKER TRIPPING.  TROUBLESHOT IAW FIM 49-11 FT 959,  REMOVED AND REPLACED THE K176 RELAY, PERFORMED APU OPS CHECKED IAW AMM 49-11-00. OPS CHECKED GOOD.  NO DEFECTS NOTED.

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