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Confusion on the part of ARTCC radar controller about altitude that corporate light transport is cleared to results in less than standard separation.
| Attributes | |
| ACN | 134757 |
| Time | |
| Date | 199001 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : lfk |
| State Reference | TX |
| Altitude | msl bound lower : 33000 msl bound upper : 33400 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 60 flight time total : 8200 flight time type : 2000 |
| ASRS Report | 134757 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 24300 vertical : 1600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Departed sat for lancaster, PA. ZHU cleared us to climb unrestricted to FL370 (out of low 20's). Acknowledged and set altitude alerter to FL370. Shortly after we were handed off to a new sector (ZHU 134.35). Reported out of (I think) FL280, climbing to FL370. Controller acknowledged. Out of FL334 ZHU called, 'maintain 330, you were only cleared to 330, turn right 30 degrees.' he then gave air carrier Y a turn of 30 degrees. We stated again that we had been cleared to FL370, but would descend to FL330. Controller stated he would check with previous sector. We recall no amended altitude clearance limit of FL300, nor do we believe there was any given to us. We both clearly remember being cleared to FL370 be previous sector. (We had been cleared direct luf VOR, also.) it seems to me there may by a communication problem between the 2 center sectors, and apparently our initial call-in, 'climbing to 370,' never registered with this controller.
Original NASA ASRS Text
Title: CONFUSION ON THE PART OF ARTCC RADAR CTLR ABOUT ALT THAT CORPORATE LTT IS CLEARED TO RESULTS IN LESS THAN STANDARD SEPARATION.
Narrative: DEPARTED SAT FOR LANCASTER, PA. ZHU CLRED US TO CLB UNRESTRICTED TO FL370 (OUT OF LOW 20'S). ACKNOWLEDGED AND SET ALT ALERTER TO FL370. SHORTLY AFTER WE WERE HANDED OFF TO A NEW SECTOR (ZHU 134.35). RPTED OUT OF (I THINK) FL280, CLBING TO FL370. CTLR ACKNOWLEDGED. OUT OF FL334 ZHU CALLED, 'MAINTAIN 330, YOU WERE ONLY CLRED TO 330, TURN RIGHT 30 DEGS.' HE THEN GAVE ACR Y A TURN OF 30 DEGS. WE STATED AGAIN THAT WE HAD BEEN CLRED TO FL370, BUT WOULD DSND TO FL330. CTLR STATED HE WOULD CHK WITH PREVIOUS SECTOR. WE RECALL NO AMENDED ALT CLRNC LIMIT OF FL300, NOR DO WE BELIEVE THERE WAS ANY GIVEN TO US. WE BOTH CLEARLY REMEMBER BEING CLRED TO FL370 BE PREVIOUS SECTOR. (WE HAD BEEN CLRED DIRECT LUF VOR, ALSO.) IT SEEMS TO ME THERE MAY BY A COM PROB BTWN THE 2 CENTER SECTORS, AND APPARENTLY OUR INITIAL CALL-IN, 'CLBING TO 370,' NEVER REGISTERED WITH THIS CTLR.
Data retrieved from NASA's ASRS site as of July 2007 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.