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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Near midair collision between an small aircraft sel high wing in a shallow cruise descent at 4000 ft 10 mi away from a tower controled airport and another unknown aircraft passing by approximately 100 ft beneath the reporter's aircraft. No evasive action taken, insufficient time after sighting.
| Attributes | |
| ACN | 365579 |
| Time | |
| Date | 199703 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : jef |
| State Reference | MO |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : jef |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent other |
| Flight Plan | None |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time total : 500 |
| ASRS Report | 365579 |
| Person 2 | |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 100 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
I was heading approximately 180 degrees, descending from 4000 ft MSL over confluence of missouri and osage rivers, when I heard an aircraft announce on 125.6 (jef NFCT) his approach for landing from 10 mi southeast. I glanced out left window -- just in time to see a plane pass directly under me at about 100 ft lower altitude. His heading was approximately 300 degrees. I looked out right window to better estimate his altitude, but was unable to see him again. I almost called him to ask if he had seen me, but didn't. If pilots were in habit of giving altitude, as well as inbound heading (or outbound for departures) when that information is available, all traffic in area would be better able to spot possible conflicts before they occur. As most GA now have GPS, this information would be at hand, as is altitude, and would take little time to report.
Original NASA ASRS Text
Title: NMAC BTWN AN SMA SEL HIGH WING IN A SHALLOW CRUISE DSCNT AT 4000 FT 10 MI AWAY FROM A TWR CTLED ARPT AND ANOTHER UNKNOWN ACFT PASSING BY APPROX 100 FT BENEATH THE RPTR'S ACFT. NO EVASIVE ACTION TAKEN, INSUFFICIENT TIME AFTER SIGHTING.
Narrative: I WAS HDG APPROX 180 DEGS, DSNDING FROM 4000 FT MSL OVER CONFLUENCE OF MISSOURI AND OSAGE RIVERS, WHEN I HEARD AN ACFT ANNOUNCE ON 125.6 (JEF NFCT) HIS APCH FOR LNDG FROM 10 MI SE. I GLANCED OUT L WINDOW -- JUST IN TIME TO SEE A PLANE PASS DIRECTLY UNDER ME AT ABOUT 100 FT LOWER ALT. HIS HDG WAS APPROX 300 DEGS. I LOOKED OUT R WINDOW TO BETTER ESTIMATE HIS ALT, BUT WAS UNABLE TO SEE HIM AGAIN. I ALMOST CALLED HIM TO ASK IF HE HAD SEEN ME, BUT DIDN'T. IF PLTS WERE IN HABIT OF GIVING ALT, AS WELL AS INBOUND HDG (OR OUTBOUND FOR DEPS) WHEN THAT INFO IS AVAILABLE, ALL TFC IN AREA WOULD BE BETTER ABLE TO SPOT POSSIBLE CONFLICTS BEFORE THEY OCCUR. AS MOST GA NOW HAVE GPS, THIS INFO WOULD BE AT HAND, AS IS ALT, AND WOULD TAKE LITTLE TIME TO RPT.
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.