# SDR J7SA2026072300492

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 2026
- Submitted: July 24, 2026
- Operation: Air carrier
- Aircraft: [N388FX](https://openairdocs.org/aircraft/N388FX), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500693
- Aircraft time: 4,071 hours, 2,941 cycles
- System (JASC): [3440 · Independent Position Determining System](https://openairdocs.org/jasc/3440)
- Part: Position Unit
- Part number: 0110317710
- Condition: Faulted
- Location: Zone 100
- Stage of operation: IN
- 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/J7SA2026072300492

## Discrepancy

DISCOVERED AIRCRAFT SUSCEPTIBLE TO HIGH SPEED DATA BUS (HSDB) ISSUE CAUSED BY A FAILURE OF THE XM RADIO RECEIVER. THIS AIRCRAFT IS ONE OF 17 EMBRAER PHENOM 300 AIRCRAFT IN THE FLEXJET FLEET THAT IS EQUIPPED WITH XM RADIO AND AVIONICS SOFTWARE LOAD 18.10. IN THIS CONFIGURATION, THE RECEIVER CAN GO INTO RESET MODE WHEN IT RECEIVES CERTAIN PACKETS OF DATA FROM SIRIUS XM. DURING A XM RADIO RESET, IT DRAWS DOWN THE HSDB, RESULTING IN SOME OR ALL OF FOLLOWING CAS MESSAGES: HSDB FAULT, ENGINE NO DISPATCH, E2 TT0 HTR FAIL, GND SPLR FAIL. FURTHER, IT CAN DRIVE THE FOLLOWING GTC MESSAGES: GDL69 FAIL AND FAILED DATA PATH. LASTLY, THE FOLLOWING MFD ENGINE INDICATIONS MAY BE PRESENT: YELLOW X OVER E1 AND E2 OIL PRESSURE, YELLOW X OVER N1 AND N2 ENGINE, YELLOW X OVER LH AND RH ITT, YELLOW X OVER LFE VALUE.

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