 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Near midair collision occurs when the pilot of a schweizer 300C notices too late that a twin cessna pilot who was issuing contradictory position reports on CTAF, was directly under his aircraft 5 NM east of 2v2, co.
| Attributes | |
| ACN | 565485 |
| Time | |
| Date | 200211 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : 2v2.airport |
| State Reference | CO |
| Altitude | agl single value : 1200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Helicopter |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | None |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Cessna 401 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 200 flight time total : 12000 flight time type : 60 |
| ASRS Report | 565485 |
| Person 2 | |
| Function | observation : passenger |
| Events | |
| Anomaly | conflict : nmac non adherence : far non adherence : published procedure non adherence other other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
En route from ft. Collins/downtown airport to company. Cruising at 1200 ft AGL with unrestr visibility. Monitoring CTAF frequencys of airports we were passing near and would announce our location as necessary. Heard cessna call longmont (2v2) for airport advisories. Very poor, weak quality call and position was confused. Cessna initially reported north of 2v2 then changed to 5 mi south of 2v2. Both rated passenger and myself were actively looking for the traffic although they should be well clear of our flight. I caught some movement from our left and discovered the twin cessna underneath of our flight! This is the same cessna that reported north then south of the airport. They were actually east of this airport and obviously very low for being 5 mi from the airport. There was no evidence that they ever saw us. They did not respond to our radio call and we did not have time to divert to 2v2 and challenge them in person.
Original NASA ASRS Text
Title: NMAC OCCURS WHEN THE PLT OF A SCHWEIZER 300C NOTICES TOO LATE THAT A TWIN CESSNA PLT WHO WAS ISSUING CONTRADICTORY POS RPTS ON CTAF, WAS DIRECTLY UNDER HIS ACFT 5 NM E OF 2V2, CO.
Narrative: ENRTE FROM FT. COLLINS/DOWNTOWN ARPT TO COMPANY. CRUISING AT 1200 FT AGL WITH UNRESTR VISIBILITY. MONITORING CTAF FREQS OF ARPTS WE WERE PASSING NEAR AND WOULD ANNOUNCE OUR LOCATION AS NECESSARY. HEARD CESSNA CALL LONGMONT (2V2) FOR ARPT ADVISORIES. VERY POOR, WEAK QUALITY CALL AND POS WAS CONFUSED. CESSNA INITIALLY RPTED N OF 2V2 THEN CHANGED TO 5 MI S OF 2V2. BOTH RATED PAX AND MYSELF WERE ACTIVELY LOOKING FOR THE TFC ALTHOUGH THEY SHOULD BE WELL CLEAR OF OUR FLT. I CAUGHT SOME MOVEMENT FROM OUR L AND DISCOVERED THE TWIN CESSNA UNDERNEATH OF OUR FLT! THIS IS THE SAME CESSNA THAT RPTED N THEN S OF THE ARPT. THEY WERE ACTUALLY E OF THIS ARPT AND OBVIOUSLY VERY LOW FOR BEING 5 MI FROM THE ARPT. THERE WAS NO EVIDENCE THAT THEY EVER SAW US. THEY DID NOT RESPOND TO OUR RADIO CALL AND WE DID NOT HAVE TIME TO DIVERT TO 2V2 AND CHALLENGE THEM IN PERSON.
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.