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Mdt come in close proximity to another aircraft during descent into non radar airport. Reporter advocates radar installation.
| Attributes | |
| ACN | 154847 |
| Time | |
| Date | 199008 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : gcn |
| State Reference | AZ |
| Altitude | msl bound lower : 10500 msl bound upper : 10700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport, High Wing, 2 Turboprop Eng |
| Flight Phase | descent other landing other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 5000 flight time type : 2000 |
| ASRS Report | 154847 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
On visibility approach to gcn we passed directly over an aircraft with less than 200' sep. Center had advised us of several VFR targets and we had contact on several more. We were scanning very hard just prior to the near midair collision due to known heavy concentration of traffic westbound at 10500' and 8500'. See and avoid doesn't work all the time. We were looking hard the few mins prior and failed to see this traffic. With the amount of traffic in gcn during peak season its just a matter of time until a mid-air happens. Terminal radar/approach control would be a bit step in preventing this.
Original NASA ASRS Text
Title: MDT COME IN CLOSE PROX TO ANOTHER ACFT DURING DESCENT INTO NON RADAR ARPT. REPORTER ADVOCATES RADAR INSTALLATION.
Narrative: ON VIS APCH TO GCN WE PASSED DIRECTLY OVER AN ACFT WITH LESS THAN 200' SEP. CTR HAD ADVISED US OF SEVERAL VFR TARGETS AND WE HAD CONTACT ON SEVERAL MORE. WE WERE SCANNING VERY HARD JUST PRIOR TO THE NMAC DUE TO KNOWN HVY CONCENTRATION OF TFC WBND AT 10500' AND 8500'. SEE AND AVOID DOESN'T WORK ALL THE TIME. WE WERE LOOKING HARD THE FEW MINS PRIOR AND FAILED TO SEE THIS TFC. WITH THE AMOUNT OF TFC IN GCN DURING PEAK SEASON ITS JUST A MATTER OF TIME UNTIL A MID-AIR HAPPENS. TERMINAL RADAR/APCH CTL WOULD BE A BIT STEP IN PREVENTING THIS.
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.