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ZAU center controller and pilot reported a GPS failure during IFR flight that resulted in a clearance deviation and airborne conflict.
| Attributes | |
| ACN | 1690964 |
| Time | |
| Date | 201910 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZAU.ARTCC |
| State Reference | IL |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Golden Eagle 421 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Route In Use | Direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | PA-31 Navajo/Chieftan/Mojave/T1040 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 9 |
| Person 2 | |
| Function | Single Pilot Pilot Flying |
| Experience | Flight Crew Last 90 Days 45 Flight Crew Total 4480 Flight Crew Type 650 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Conflict Airborne Conflict Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Track / Heading All Types |
Narrative:
I just took over the sector. Aircraft X had a crossing of a fix at 4;000 feet. Aircraft Y was at 7;000 feet; with a vector behind aircraft X. Aircraft X was through I believe 6;800 feet; so I knew I could get aircraft Y on course soon. I gave a couple of clearances to other aircraft; and was evaluating a situation to the north when I saw aircraft X climbing and flying roughly a 070 heading (mind you his flight plan and previous path was approximately a 280 heading.) I immediately asked what his altitude was; and expedited him down; calling the traffic. I then called traffic for aircraft Y. I informed aircraft X that he was flying away from his assigned flight plan. He said that he 'lost power to the panel; and was correcting.' I asked if everything was ok; and he said he had everything back. I gave a few other clearances; made sure aircraft X was ok; then advised he calls center because of a possible pilot deviation.
Original NASA ASRS Text
Title: ZAU Center Controller and pilot reported a GPS failure during IFR flight that resulted in a clearance deviation and airborne conflict.
Narrative: I just took over the sector. Aircraft X had a crossing of a fix at 4;000 feet. Aircraft Y was at 7;000 feet; with a vector behind Aircraft X. Aircraft X was through I believe 6;800 feet; so I knew I could get Aircraft Y on course soon. I gave a couple of clearances to other aircraft; and was evaluating a situation to the north when I saw Aircraft X climbing and flying roughly a 070 heading (mind you his flight plan and previous path was approximately a 280 heading.) I immediately asked what his altitude was; and expedited him down; calling the traffic. I then called traffic for Aircraft Y. I informed Aircraft X that he was flying away from his assigned flight plan. He said that he 'lost power to the panel; and was correcting.' I asked if everything was ok; and he said he had everything back. I gave a few other clearances; made sure Aircraft X was ok; then advised he calls Center because of a possible pilot deviation.
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.