# SDR IPXA2021010864230

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 8, 2021
- Submitted: January 11, 2021
- Operation: Air carrier
- Aircraft: [N625UP](https://openairdocs.org/aircraft/N625UP), registered now
- Make and model: Boeing 747-8F
- Registry model: [Boeing 747-8F](https://openairdocs.org/model/boeing-747-8f) (OpenAirDocs)
- Aircraft serial: 65782
- Aircraft time: 275 hours, 49 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Warning Message
- Condition: Illuminated
- Location: Data Comm Unit
- Stage of operation: CR
- 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/IPXA2021010864230

## Discrepancy

INSPECTION TYPE: N/A DIVERSION, NO EMERGENCY DECLARED.  A/C DIVERTED INTO ALA FOR: HF DATA R, SATCOM VOICE, HF DATA L, SATCOM DATA, DATALINK SYSTEM, DATALINK LOST, CMU.  EICAS MESSAGES INTERMITTANT EXCEPT HF DATA L/R RESET CB'S OF 'CMU AC' PERFORMED ALL DATA LINK COMM TEST HF-L, HF-R, SATCOM, IAW AMM 23-27-00-501 TASK 730-801 (CMU SYS TEST) SATIS.

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