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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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ZOB controller experienced operational error at 12000 ft when climbing aircraft was cleared through occupied altitude.
| Attributes | |
| ACN | 699750 |
| Time | |
| Date | 200606 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : lnn.ndb |
| State Reference | OH |
| Altitude | msl single value : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air taxi |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 16 controller supervisory : 2 |
| ASRS Report | 699750 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued new clearance controller : issued alert |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 10500 vertical : 100 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation Operational Error |
Narrative:
Air carrier X was climbing to 11000 ft nebound from cle. These aircraft are handed off from cle approach to the yng sector at ZOB. Youngstown (yng) then climbs aircraft to requested altitude and hand aircraft off to windsor (yqg) sector at ZOB. I was working yqg when this incident occurred. Air carrier X checked on my frequency climbing to 11000 ft. I back-coordination with yng to verify I had control to climb aircraft and also verified cle approach had relinquished control for climb. Yng confirmed I had control and I climbed air carrier X to 15000 ft. I had other control problems with cle arrs and then noticed the conflict alert activate between air carrier X and air carrier Y. Air carrier Y data block show 11000 ft climbing to FL230 and had about 6 mi between aircraft and 200+ KTS overtake. After clearing traffic confliction over himez intersection; I looked back at confliction and saw air carrier X at about 11600 ft and air carrier Y about same altitude and now less than 5 mi. I advised air carrier X to stop climb and level at nearest altitude. He said he would stop at 12000 ft. I then saw air carrier X at 11800 ft and air carrier Y at 11900 ft and about 2 mi. I instructed air carrier X to stop climb and descend back to 11000 ft. I think closest proximity was about 1.5 mi and 100 ft. A large factor was confusion between yng sector and cle approach concerning new mase airspace and lack of communication between facilities. As air carrier X descend; he descended back into cle approach without coordination from myself or 'right' associate.
Original NASA ASRS Text
Title: ZOB CTLR EXPERIENCED OPERROR AT 12000 FT WHEN CLBING ACFT WAS CLRED THROUGH OCCUPIED ALT.
Narrative: ACR X WAS CLBING TO 11000 FT NEBOUND FROM CLE. THESE ACFT ARE HANDED OFF FROM CLE APCH TO THE YNG SECTOR AT ZOB. YOUNGSTOWN (YNG) THEN CLBS ACFT TO REQUESTED ALT AND HAND ACFT OFF TO WINDSOR (YQG) SECTOR AT ZOB. I WAS WORKING YQG WHEN THIS INCIDENT OCCURRED. ACR X CHKED ON MY FREQ CLBING TO 11000 FT. I BACK-COORD WITH YNG TO VERIFY I HAD CTL TO CLB ACFT AND ALSO VERIFIED CLE APCH HAD RELINQUISHED CTL FOR CLB. YNG CONFIRMED I HAD CTL AND I CLBED ACR X TO 15000 FT. I HAD OTHER CTL PROBS WITH CLE ARRS AND THEN NOTICED THE CONFLICT ALERT ACTIVATE BTWN ACR X AND ACR Y. ACR Y DATA BLOCK SHOW 11000 FT CLBING TO FL230 AND HAD ABOUT 6 MI BTWN ACFT AND 200+ KTS OVERTAKE. AFTER CLRING TFC CONFLICTION OVER HIMEZ INTXN; I LOOKED BACK AT CONFLICTION AND SAW ACR X AT ABOUT 11600 FT AND ACR Y ABOUT SAME ALT AND NOW LESS THAN 5 MI. I ADVISED ACR X TO STOP CLB AND LEVEL AT NEAREST ALT. HE SAID HE WOULD STOP AT 12000 FT. I THEN SAW ACR X AT 11800 FT AND ACR Y AT 11900 FT AND ABOUT 2 MI. I INSTRUCTED ACR X TO STOP CLB AND DSND BACK TO 11000 FT. I THINK CLOSEST PROX WAS ABOUT 1.5 MI AND 100 FT. A LARGE FACTOR WAS CONFUSION BTWN YNG SECTOR AND CLE APCH CONCERNING NEW MASE AIRSPACE AND LACK OF COM BTWN FACILITIES. AS ACR X DSND; HE DSNDED BACK INTO CLE APCH WITHOUT COORD FROM MYSELF OR 'R' ASSOCIATE.
Data retrieved from NASA's ASRS site as of January 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.