# SDR ASAA2019063029887

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 2019
- Submitted: July 2, 2019
- Operation: Air carrier
- Aircraft: [N559AS](https://openairdocs.org/aircraft/N559AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35178
- Aircraft time: 47,431 hours, 14,077 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Unknown
- Condition: Malfunctioned
- Location: Hf Comm
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019063029887

## Discrepancy

HF 1 FAILED ABOUT 90 MINUTES INTO THE FLIGHT - NO AUDIO AT ALL, SENSITIVITY AT 100%. CIRCUIT BREAKER NOT POPPED. GROUNDED - YES. ABLE TO COMMUNICATE. SYS CKS NML. NO FAULTS FOUND. PERFORMED SYS OPS TEST REF AMM 23-11-00.

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