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An air carrier DC8 freighter accepted visual separation from another aircraft to climb through the other aircraft's altitude. The DC8 had to take evasive action. Night operation. Fast climb and turn to achieve the separation that he thought was proper.
| Attributes | |
| ACN | 347220 |
| Time | |
| Date | 199607 |
| Day | Wed |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : lhy |
| State Reference | NY |
| Altitude | msl bound lower : 16000 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | DC-8F |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 170 flight time total : 17000 |
| ASRS Report | 347220 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 1500 vertical : 200 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
I was cleared to climb through the altitude of another aircraft after center verified that I had them in sight, and could maintain visual separation. When I started my climb, it appeared that we were on a converging flight path, so I asked the controller for the other aircraft's heading. At the time, I was heading 270 degrees and never heard the controller's reply. I repeated my request and then the pilot of the other aircraft stated 'heading 310 degrees.' I immediately realized that we were converging and quite rapidly, so I began an evasive maneuver, right turn, and instant climb. I feel that the controller should have cautioned me about the other aircraft heading and that we were on converging paths.
Original NASA ASRS Text
Title: AN ACR DC8 FREIGHTER ACCEPTED VISUAL SEPARATION FROM ANOTHER ACFT TO CLB THROUGH THE OTHER ACFT'S ALT. THE DC8 HAD TO TAKE EVASIVE ACTION. NIGHT OP. FAST CLB AND TURN TO ACHIEVE THE SEPARATION THAT HE THOUGHT WAS PROPER.
Narrative: I WAS CLRED TO CLB THROUGH THE ALT OF ANOTHER ACFT AFTER CTR VERIFIED THAT I HAD THEM IN SIGHT, AND COULD MAINTAIN VISUAL SEPARATION. WHEN I STARTED MY CLB, IT APPEARED THAT WE WERE ON A CONVERGING FLT PATH, SO I ASKED THE CTLR FOR THE OTHER ACFT'S HDG. AT THE TIME, I WAS HDG 270 DEGS AND NEVER HEARD THE CTLR'S REPLY. I REPEATED MY REQUEST AND THEN THE PLT OF THE OTHER ACFT STATED 'HDG 310 DEGS.' I IMMEDIATELY REALIZED THAT WE WERE CONVERGING AND QUITE RAPIDLY, SO I BEGAN AN EVASIVE MANEUVER, R TURN, AND INSTANT CLB. I FEEL THAT THE CTLR SHOULD HAVE CAUTIONED ME ABOUT THE OTHER ACFT HDG AND THAT WE WERE ON CONVERGING PATHS.
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.