<< >> NASA ASRS Report 760516, October 2007

A pilot reports a near miss with an aircraft maneuvering near CTAF 15FL when the other aircraft was not monitoring the appropriate frequency.

Attributes
ACN	760516
Time
Date	200710
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Experimental
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	None
Aircraft 2
Operator	other
Make Model Name	Cessna 210 Centurion / Turbo Centurion 210C 210D
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 14 flight time total : 950 flight time type : 497
ASRS Report	760516
Events
Anomaly	conflict : nmac non adherence : far non adherence : published procedure other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment flight crew : took evasive action
Miss Distance	horizontal : 200 vertical : 0
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

On approach to landing at ZZZ and 5 mi out I observed an aircraft that appeared to be turning base for ZZZ. I altered course to the west to give clearance. Then at 3 mi the other aircraft began turning south into my flight path. I had to make a +60 degree bank to the south to avoid a collision. When I rolled out we were at the same altitude and heading south approximately 300 ft apart. I then tried to contact other aircraft on ZZZ frequency of 123.0 and 122.75. No response or wing rock to acknowledge my radio calls. I then climbed to 2500 ft and turned north to return to ZZZ. As I leveled out I saw that the other plane had also turned north and was approximately 500 ft beneath me. At this time I continued my climb while following the other pilot and maintaining my position and holding him in my sight at my 11 O'clock position. I followed him through 3 turns and then I departed to the west at 3700-4000 ft. This incident could have been avoided if the other aircraft would monitor ZZZ frequency of 123.0 when operating within the approach path for ZZZ.

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Original NASA ASRS Text

Title: A PILOT REPORTS A NEAR MISS WITH AN ACFT MANEUVERING NEAR CTAF 15FL WHEN THE OTHER ACFT WAS NOT MONITORING THE APPROPRIATE FREQUENCY.

Narrative: ON APCH TO LNDG AT ZZZ AND 5 MI OUT I OBSERVED AN ACFT THAT APPEARED TO BE TURNING BASE FOR ZZZ. I ALTERED COURSE TO THE W TO GIVE CLRNC. THEN AT 3 MI THE OTHER ACFT BEGAN TURNING S INTO MY FLT PATH. I HAD TO MAKE A +60 DEG BANK TO THE S TO AVOID A COLLISION. WHEN I ROLLED OUT WE WERE AT THE SAME ALT AND HDG S APPROX 300 FT APART. I THEN TRIED TO CONTACT OTHER ACFT ON ZZZ FREQ OF 123.0 AND 122.75. NO RESPONSE OR WING ROCK TO ACKNOWLEDGE MY RADIO CALLS. I THEN CLBED TO 2500 FT AND TURNED N TO RETURN TO ZZZ. AS I LEVELED OUT I SAW THAT THE OTHER PLANE HAD ALSO TURNED N AND WAS APPROX 500 FT BENEATH ME. AT THIS TIME I CONTINUED MY CLB WHILE FOLLOWING THE OTHER PLT AND MAINTAINING MY POS AND HOLDING HIM IN MY SIGHT AT MY 11 O'CLOCK POS. I FOLLOWED HIM THROUGH 3 TURNS AND THEN I DEPARTED TO THE W AT 3700-4000 FT. THIS INCIDENT COULD HAVE BEEN AVOIDED IF THE OTHER ACFT WOULD MONITOR ZZZ FREQ OF 123.0 WHEN OPERATING WITHIN THE APCH PATH FOR ZZZ.

Data retrieved from NASA's ASRS site as of January 2009 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.