<< >> NASA ASRS Report 592051, August 2003

Flight crew of CL60 experiences near midair collision with small aircraft during VFR maneuvering for visual approachs to runway 5 at apf.

Attributes
ACN	592051
Time
Date	200308
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : apf.airport
State Reference	FL
Altitude	agl single value : 1100
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : apf.tower
Operator	general aviation : corporate
Make Model Name	Challenger CL604
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : apf.tower
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	None
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 80 flight time total : 13000 flight time type : 120
ASRS Report	592051
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	conflict : nmac non adherence : clearance other spatial deviation
Independent Detector	aircraft equipment : tcas other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Airport
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Cleared for a visual approach left base runway 5, cleared to land by tower. Light single engine pilot on left downwind to runway 5 was advised by tower of our position but evidently did not see us and/or was unable to avoid intruding into our flight path. We leveled off on base, based on TCASII advisories plus visual avoidance and observed the light single pilot turn away from the airport, toward us, and pass 100 ft below our altitude of approximately 1100 ft AGL. We went missed approach. We attribute this incident to the light single pilot's inability to see and avoid our aircraft plus tower's late realization that he was not adjusting his downwind pattern to avoid our flight path.

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Original NASA ASRS Text

Title: FLT CREW OF CL60 EXPERIENCES NMAC WITH SMA DURING VFR MANEUVERING FOR VISUAL APCHS TO RWY 5 AT APF.

Narrative: CLRED FOR A VISUAL APCH L BASE RWY 5, CLRED TO LAND BY TWR. LIGHT SINGLE ENG PLT ON L DOWNWIND TO RWY 5 WAS ADVISED BY TWR OF OUR POS BUT EVIDENTLY DID NOT SEE US AND/OR WAS UNABLE TO AVOID INTRUDING INTO OUR FLT PATH. WE LEVELED OFF ON BASE, BASED ON TCASII ADVISORIES PLUS VISUAL AVOIDANCE AND OBSERVED THE LIGHT SINGLE PLT TURN AWAY FROM THE ARPT, TOWARD US, AND PASS 100 FT BELOW OUR ALT OF APPROX 1100 FT AGL. WE WENT MISSED APCH. WE ATTRIBUTE THIS INCIDENT TO THE LIGHT SINGLE PLT'S INABILITY TO SEE AND AVOID OUR ACFT PLUS TWR'S LATE REALIZATION THAT HE WAS NOT ADJUSTING HIS DOWNWIND PATTERN TO AVOID OUR FLT PATH.

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.