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Air carrier X unauthorized climb to occupied altitude had less than standard separation from cpr Y. System error.
| Attributes | |
| ACN | 205772 |
| Time | |
| Date | 199203 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : crg |
| State Reference | FL |
| Altitude | msl bound lower : 26600 msl bound upper : 27000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx tower : mdw |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 26 |
| ASRS Report | 205772 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : published procedure non adherence : clearance non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18000 vertical : 400 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X was issued a clearance to climb to FL270. An amending clearance was issued for air carrier X to maintain FL260. Air carrier X climbed to FL266 and conflicted with cpr Y at FL270. This situation occurred during heavy/complex traffic conditions. The time on the sector was approaching 2 hours and the sector had been very busy during this time. At the time of the occurrence the sector was staffed with a radar man, a tracker and a manual controller, but the sector had been worked for part of the 2 hours by one person. The complexity of the sector was increased when ZMA handed off 2 aircraft at FL270 that were very slow moving and chop at the higher altitudes was causing several aircraft to stay at the lower altitudes. This system error could have been avoided if air carrier X had responded to the radio promptly. There seems to be a growing trend of aircraft not promptly responding to the radio.
Original NASA ASRS Text
Title: ACR X UNAUTHORIZED CLB TO OCCUPIED ALT HAD LTSS FROM CPR Y. SYS ERROR.
Narrative: ACR X WAS ISSUED A CLRNC TO CLB TO FL270. AN AMENDING CLRNC WAS ISSUED FOR ACR X TO MAINTAIN FL260. ACR X CLBED TO FL266 AND CONFLICTED WITH CPR Y AT FL270. THIS SITUATION OCCURRED DURING HVY/COMPLEX TFC CONDITIONS. THE TIME ON THE SECTOR WAS APCHING 2 HRS AND THE SECTOR HAD BEEN VERY BUSY DURING THIS TIME. AT THE TIME OF THE OCCURRENCE THE SECTOR WAS STAFFED WITH A RADAR MAN, A TRACKER AND A MANUAL CTLR, BUT THE SECTOR HAD BEEN WORKED FOR PART OF THE 2 HRS BY ONE PERSON. THE COMPLEXITY OF THE SECTOR WAS INCREASED WHEN ZMA HANDED OFF 2 ACFT AT FL270 THAT WERE VERY SLOW MOVING AND CHOP AT THE HIGHER ALTS WAS CAUSING SEVERAL ACFT TO STAY AT THE LOWER ALTS. THIS SYS ERROR COULD HAVE BEEN AVOIDED IF ACR X HAD RESPONDED TO THE RADIO PROMPTLY. THERE SEEMS TO BE A GROWING TREND OF ACFT NOT PROMPTLY RESPONDING TO THE RADIO.
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.