 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
ZOB controller experienced operational error at FL230 with two minimally spaced in-trail aircraft. Adjacent controller changed altitude of first aircraft without coordination.
| Attributes | |
| ACN | 772265 |
| Time | |
| Date | 200801 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : djb.vortac |
| State Reference | OH |
| Altitude | msl single value : 23000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Learjet 25 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 18 controller time certified in position1 : 4 |
| ASRS Report | 772265 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial pilot : atp pilot : private pilot : student |
| Experience | flight time last 90 days : 75 flight time total : 7400 flight time type : 2500 |
| ASRS Report | 772529 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera other flight crewa |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 25000 vertical : 300 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I switched aircraft X to bsw climbing to FL230. Aircraft Y leveled off and sped up. Aircraft X slowed down and was no longer going to be 5 mi ahead of aircraft Y. Bsw called and said they would stop aircraft X at FL220. When I saw FL220 in the data block I did not turn aircraft Y. I switched aircraft Y to bsw. Supplemental information from acn 772529: takeoff out of youngstown; oh; going wbound. Have done this numerous times. Youngstown approach told us to call ZOB. We called ZOB and was cleared to FL230 (which is typical). Cleveland told us to call ZOB on a new frequency. We completed any appropriate checklist and called ZOB. Upon calling ZOB the controller asked if we were climbing to FL220. We were at FL226 at the time of the call. ZOB then informed us that we were only cleared to FL220. We descended back down to FL220. Flight continued without incident.
Original NASA ASRS Text
Title: ZOB CTLR EXPERIENCED OPERROR AT FL230 WITH TWO MINIMALLY SPACED IN-TRAIL ACFT. ADJACENT CTLR CHANGED ALT OF FIRST ACFT WITHOUT COORD.
Narrative: I SWITCHED ACFT X TO BSW CLBING TO FL230. ACFT Y LEVELED OFF AND SPED UP. ACFT X SLOWED DOWN AND WAS NO LONGER GOING TO BE 5 MI AHEAD OF ACFT Y. BSW CALLED AND SAID THEY WOULD STOP ACFT X AT FL220. WHEN I SAW FL220 IN THE DATA BLOCK I DID NOT TURN ACFT Y. I SWITCHED ACFT Y TO BSW. SUPPLEMENTAL INFO FROM ACN 772529: TKOF OUT OF YOUNGSTOWN; OH; GOING WBOUND. HAVE DONE THIS NUMEROUS TIMES. YOUNGSTOWN APCH TOLD US TO CALL ZOB. WE CALLED ZOB AND WAS CLRED TO FL230 (WHICH IS TYPICAL). CLEVELAND TOLD US TO CALL ZOB ON A NEW FREQ. WE COMPLETED ANY APPROPRIATE CHKLIST AND CALLED ZOB. UPON CALLING ZOB THE CTLR ASKED IF WE WERE CLBING TO FL220. WE WERE AT FL226 AT THE TIME OF THE CALL. ZOB THEN INFORMED US THAT WE WERE ONLY CLRED TO FL220. WE DSNDED BACK DOWN TO FL220. FLT CONTINUED WITHOUT INCIDENT.
Data retrieved from NASA's ASRS site as of May 2009 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.