Table 3
CADORS report number, date, time, location, and narrative for issues attributed to space weather impacts to HF radio communications. Narrative entries have not been modified from the CADORS report.
| CADORS number | Date time (UT) | Location # aircraft | Narrative |
|---|---|---|---|
| 2024C2966 | 20240511 10:07 | Nunavut (1 aircraft) | A Societe Air France Boeing 777-300 (FGZNU/AFR163) from Tokyo/Haneda, Japan (RJTT) to Paris/Charles de Gaulle, France (LFPG) showed radio failure on automatic dependent surveillance - broadcast (ADS-B) and then climbed without a clearance. |
| 2024C4190 | 20240514 11:38 | Nunavut (1 aircraft) | A Lufthansa German Airlines Boeing (DLH717) from RJTT to EDDF was observed on surveillance display climbing from FL330 to FL350 without a clearance from air traffic control (ATC), and in close proximity to a boundary between Edmonton Area Control Center and Reykjavik Control Center. The event occurred when the flight was approximately 70 miles from entering Reykjavik Control Area. High Frequency (HF) conditions were very poor or blackout during this period. The flight may not have had any contact with ATC for several hours during this period. No data link connection was present, too far North. The aircraft may have been following North Atlantic Traffic (NAT) communication failure procedures. |
| 2024C4189 | 20240515 11:35 | Nunavut (1 aircraft) | A Societe Air France Boeing (AFR291) from RJBB to LFPG was observed on surveillance display climbing from FL350 to FL370 without a clearance from air traffic control (ATC), and in close proximity to a boundary between Edmonton Area Control Center and Reykjavik Control Center. The event occurred when the flight was approximately 70 miles from entering Reykjavik Control Area. High Frequency (HF) conditions were very poor or blackout during this period. The flight had previously had positive data link connection with Edmonton area control centre (ACC). The aircraft may have been following North Atlantic Traffic (NAT) communication failure procedures. The obtained positive HF contact with Iceland Radio at the boundary or shortly after, with Reykjavik Control Center. (Second entry, 2024C4188, 20240515, 11:37 UT) |
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