ADS-B glitchesAero L-39 Albatros
Aero L-39 Albatros N939TS records a speed far outside nearby readings
One report showed 1,476.7 knots; 16 surrounding reports ranged from 236 to 305 knots.
A reported ground speed of 1,476.7 knots stood far outside the surrounding readings during a flight on June 21, 2026. The aircraft database identifies N939TS as an Aero L-39 Albatros. Its reported positions placed it near Morrice, Michigan.
The 16 surrounding reports ranged from 236 to 305 knots, with the reports immediately before and after the spike both around 270 knots. That narrow range makes the isolated value suspect. It could reflect a decoding or data error; the readings alone establish neither the cause nor an aircraft performance achievement.
Recorded data for N939TS
| Observed | to |
|---|---|
| Event type | Data quality |
| Recorded source | ADS-B, ICAO address |
| Post date | |
| Last revised |
| Type designator | L39 |
|---|---|
| Tail number (registration) | N939TS |
| Callsign | N939TS |
| ICAO address | AD08D2 |
Measurements
Displayed measurements may be rounded.
| Ground speed | 1,476.7 kn |
|---|---|
| Archived altitude; reference not retained | 12,525 ft |
| Callsign | N939TS |
|---|---|
| Transponder code | 1200 |
| Report before the outlying value | 268.8 kn |
|---|
| Report after the outlying value | 273.5 kn |
|---|
| Lowest surrounding report | 236 kn |
|---|---|
| Highest surrounding report | 305.1 kn |
| Surrounding reports | 16 reports |
Record details
Public event ID: 6b74cc3e-16bf-40.
Record revision: 3.
Evidence version: 0a825f742bda9e5f.