<< >> NASA ASRS Report 388338, December 1997

C152 pilot conducting traffic pattern practice at an uncontrolled airport took evasive action away from a C172 which was operating in the same general area, not monitoring unicom frequency. C172 advised they were monitoring another frequency.

Attributes
ACN	388338
Time
Date	199712
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : psf
State Reference	MA
Altitude	msl bound lower : 2200 msl bound upper : 2200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Cessna 152
Operating Under FAR Part	Part 91
Flight Phase	other
Flight Plan	None
Aircraft 2
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	other
Person 1
Affiliation	Other
Function	flight crew : single pilot instruction : instructor
Qualification	pilot : cfi pilot : private
Experience	flight time last 90 days : 120 flight time total : 2900
ASRS Report	388338
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : airborne less severe non adherence : far other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 4500 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Aircraft Y (C172) was flying locally. Aircraft X was in the traffic pattern. I was conducting takeoff and landing practice in aircraft X (C152). I was using standard radio calls per the aim. Aircraft Y would frequently report in the vicinity of the airport with no answer when requested to define their position. The incident occurred as I was downwind ready to turn base. When clearing for the turn, I saw the aircraft Y coming at me, directly in front, my altitude. I made an evasive maneuver to avoid the collision and keep aircraft Y in sight as it started to turn. Distance was less then 3/4 mi. Unicom operator witnessed radio calls to the aircraft Y, which brought no response. The crew of aircraft Y said they were talking to another company function. I reminded them that they had 2 radios.

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Original NASA ASRS Text

Title: C152 PLT CONDUCTING TFC PATTERN PRACTICE AT AN UNCTLED ARPT TOOK EVASIVE ACTION AWAY FROM A C172 WHICH WAS OPERATING IN THE SAME GENERAL AREA, NOT MONITORING UNICOM FREQ. C172 ADVISED THEY WERE MONITORING ANOTHER FREQ.

Narrative: ACFT Y (C172) WAS FLYING LOCALLY. ACFT X WAS IN THE TFC PATTERN. I WAS CONDUCTING TKOF AND LNDG PRACTICE IN ACFT X (C152). I WAS USING STANDARD RADIO CALLS PER THE AIM. ACFT Y WOULD FREQUENTLY RPT IN THE VICINITY OF THE ARPT WITH NO ANSWER WHEN REQUESTED TO DEFINE THEIR POS. THE INCIDENT OCCURRED AS I WAS DOWNWIND READY TO TURN BASE. WHEN CLRING FOR THE TURN, I SAW THE ACFT Y COMING AT ME, DIRECTLY IN FRONT, MY ALT. I MADE AN EVASIVE MANEUVER TO AVOID THE COLLISION AND KEEP ACFT Y IN SIGHT AS IT STARTED TO TURN. DISTANCE WAS LESS THEN 3/4 MI. UNICOM OPERATOR WITNESSED RADIO CALLS TO THE ACFT Y, WHICH BROUGHT NO RESPONSE. THE CREW OF ACFT Y SAID THEY WERE TALKING TO ANOTHER COMPANY FUNCTION. I REMINDED THEM THAT THEY HAD 2 RADIOS.

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.