 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Chicago center controller reported an aircraft assigned 35;000 feet deviated from their altitude into confliction with traffic above them.
| Attributes | |
| ACN | 1389612 |
| Time | |
| Date | 201609 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZAU.ARTCC |
| State Reference | IL |
| Aircraft 1 | |
| Make Model Name | Learjet 35 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 6 |
| Events | |
| Anomaly | Conflict Airborne Conflict Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance |
Narrative:
Aircraft X was assigned 35;000 feet because he was merging with aircraft Y at 36;000 feet. Both pilots were issued the traffic. As aircraft X was diverging from aircraft Y and about 3 miles south of aircraft Y I notice he breaks his assigned altitude and their mode C indicates 35;400 feet and climbing. As soon as I noticed the deviation I advised aircraft X he was only assigned 35;000 feet. He says he is level at 35;000 feet; and within one update the mode C was indicated level at 35;000 feet.
Original NASA ASRS Text
Title: Chicago Center Controller reported an aircraft assigned 35;000 feet deviated from their altitude into confliction with traffic above them.
Narrative: Aircraft X was assigned 35;000 feet because he was merging with aircraft Y at 36;000 feet. Both pilots were issued the traffic. As aircraft X was diverging from aircraft Y and about 3 miles south of aircraft Y I notice he breaks his assigned altitude and their mode C indicates 35;400 feet and climbing. As soon as I noticed the deviation I advised aircraft X he was only assigned 35;000 feet. He says he is level at 35;000 feet; and within one update the mode C was indicated level at 35;000 feet.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.