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ARTCC controller failed to hear readback clearance from pilot and IFR vertical separation was not maintained during aircraft climbout.
| Attributes | |
| ACN | 143974 |
| Time | |
| Date | 199004 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : crg |
| State Reference | FL |
| Altitude | msl bound lower : 26000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : zjx |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 70 flight time total : 16000 flight time type : 80 |
| ASRS Report | 143974 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 8000 flight time type : 900 |
| ASRS Report | 143986 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
On climb out of mco the right duct leak light came on. While trying to isolate the problem and accomplish the checklist, we were cleared to what I understood to be FL290. After reading back FL290, we started to climb to FL290. As we were leaving FL250 we noticed an aircraft above and to our left. At 26200' we were called by ZJX and told to level at FL260. We were then asked what altitude we were cleared to and we told them FL290. We were then told that we had only been cleared to FL260. Supplemental information from acn 143986: we were given a phone # to contact concerning a possible altitude violation. On the next ZJX frequency we were told to disregard the previous message. After landing in bos, we called the center on the given phone #. We were informed that it was a center operational error. We had been told to climb to FL250 and we read back FL290 and the controller failed to catch the error.
Original NASA ASRS Text
Title: ARTCC CTLR FAILED TO HEAR READBACK CLRNC FROM PLT AND IFR VERTICAL SEPARATION WAS NOT MAINTAINED DURING ACFT CLIMBOUT.
Narrative: ON CLBOUT OF MCO THE RIGHT DUCT LEAK LIGHT CAME ON. WHILE TRYING TO ISOLATE THE PROB AND ACCOMPLISH THE CHKLIST, WE WERE CLRED TO WHAT I UNDERSTOOD TO BE FL290. AFTER READING BACK FL290, WE STARTED TO CLB TO FL290. AS WE WERE LEAVING FL250 WE NOTICED AN ACFT ABOVE AND TO OUR LEFT. AT 26200' WE WERE CALLED BY ZJX AND TOLD TO LEVEL AT FL260. WE WERE THEN ASKED WHAT ALT WE WERE CLRED TO AND WE TOLD THEM FL290. WE WERE THEN TOLD THAT WE HAD ONLY BEEN CLRED TO FL260. SUPPLEMENTAL INFO FROM ACN 143986: WE WERE GIVEN A PHONE # TO CONTACT CONCERNING A POSSIBLE ALT VIOLATION. ON THE NEXT ZJX FREQ WE WERE TOLD TO DISREGARD THE PREVIOUS MESSAGE. AFTER LNDG IN BOS, WE CALLED THE CENTER ON THE GIVEN PHONE #. WE WERE INFORMED THAT IT WAS A CENTER OPERROR. WE HAD BEEN TOLD TO CLB TO FL250 AND WE READ BACK FL290 AND THE CTLR FAILED TO CATCH THE ERROR.
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.