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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier large transport amended clearance altitude assignment and radar vector to prevent loss of separation.
| Attributes | |
| ACN | 128806 |
| Time | |
| Date | 198911 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : bqm |
| State Reference | KY |
| Altitude | msl bound lower : 29000 msl bound upper : 29700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors enroute airway : j89 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 11000 flight time type : 4000 |
| ASRS Report | 128806 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : instrument pilot : flight engineer |
| Experience | flight time last 90 days : 97 flight time total : 3640 flight time type : 999 |
| ASRS Report | 128809 |
| Events | |
| Anomaly | non adherence : far non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Operational Deviation |
Narrative:
Copilot was flying. While climbing to FL290, we were subsequently cleared to FL310. I read back clearance and first officer set FL310 in altitude window. While passing through 29700', ATC stated 'maintain 290 and turn left 30 degrees for traffic conflict.' we rapidly went back to FL290 and turned left. We notified ZTL (134.8) that we had been cleared to FL310. We assume ATC made a mistake. Reason: controller overloaded and overworked.
Original NASA ASRS Text
Title: ACR LGT AMENDED CLRNC ALT ASSIGNMENT AND RADAR VECTOR TO PREVENT LOSS OF SEPARATION.
Narrative: COPLT WAS FLYING. WHILE CLBING TO FL290, WE WERE SUBSEQUENTLY CLRED TO FL310. I READ BACK CLRNC AND F/O SET FL310 IN ALT WINDOW. WHILE PASSING THROUGH 29700', ATC STATED 'MAINTAIN 290 AND TURN LEFT 30 DEGS FOR TFC CONFLICT.' WE RAPIDLY WENT BACK TO FL290 AND TURNED LEFT. WE NOTIFIED ZTL (134.8) THAT WE HAD BEEN CLRED TO FL310. WE ASSUME ATC MADE A MISTAKE. REASON: CTLR OVERLOADED AND OVERWORKED.
Data retrieved from NASA's ASRS site as of August 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.