# SDR DALA2018062204159

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2018
- Submitted: June 22, 2018
- Operation: Air carrier
- Aircraft: [N1604R](https://openairdocs.org/aircraft/N1604R), registered now
- Make and model: Boeing 767332
- Aircraft serial: 30180
- Aircraft time: 87,324 hours, 12,012 cycles
- System (JASC): [3497 · Navigation System Wiring](https://openairdocs.org/jasc/3497)
- Part: Circuit Breaker
- Condition: Failed
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2018062204159

## Discrepancy

RETURNED TO DEPARTURE, DUE TO THE FIRST OFFICER MACH AIRSPEED INDICATOR FAILURE.  REPLACED THE C581 CIRCUIT BREAKER, RIGHT ADC AND RIGHT MASI. SYSTEM OPERATION IS NORMAL.

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