Boeing 757-200 N557NW's speed reports jumped to 911.7 knots and back
The aircraft was reported near Chelsea, Michigan. Readings on either side of the spike were separated from it by 15 seconds.
Recorded ground speed went from 387 knots to 911.7 knots and back to 395 knots during a flight on August 15, 2026. The aircraft database identifies N557NW as a Boeing 757-200. The aircraft was reported near Chelsea, Michigan.
Each neighboring reading was 15 seconds from the outlier, making the jump and return especially abrupt in the recorded sequence. A decoding or data error could explain the spike. This single high report does not establish that the aircraft achieved that speed, and the readings do not establish the cause.
Recorded data for N557NW
| Observed | |
|---|---|
| Event type | Data quality |
| Recorded source | ADS-B, ICAO address |
| Post date | |
| Last revised |
| Aircraft type | BOEING 757-200 |
|---|---|
| Type designator | B752 |
| Tail number (registration) | N557NW |
| Callsign | DAL916 |
| ICAO address | A71AAD |
Measurements
Displayed measurements may be rounded.
| Ground speed | 911.7 kn |
|---|---|
| Archived altitude; reference not retained | 16,875 ft |
| Callsign | DAL916 |
|---|---|
| Transponder code | 4176 |
| Report before the outlying value | 387.2 kn |
|---|
| Report after the outlying value | 395.2 kn |
|---|
| Lowest surrounding report | 332.6 kn |
|---|---|
| Highest surrounding report | 415.4 kn |
| Surrounding reports | 15 reports |
Record details
Public event ID: 9c92874c-57d2-49.
Record revision: 3.
Evidence version: 4889f53d2d1f3d83.