<< >> NASA ASRS Report 105368, February 1989

Close proximity GA traffic watch aircraft GA small aircraft same type aircraft but not traffic watch.

Attributes
ACN	105368
Time
Date	198902
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pvd
State Reference	RI
Altitude	agl bound lower : 1800 agl bound upper : 1900
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pvd
Operator	general aviation : instructional
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : intermediate altitude
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : cfi pilot : instrument
Experience	flight time last 90 days : 115 flight time total : 1000 flight time type : 580
ASRS Report	105368
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Other aircraft was same make as described above, known to be equipped with a working transponder. I was doing traffic reporting eastbound at 1800' MSL. I was in continuous communication with pvd tower. The tower did not call out any traffic to me. The other aircraft appeared suddenly approaching me going northbound at about 1900' MSL. He climbed and I dove. We avoided each other by about 100' vertically. Neither pvd tower nor quonset approach had a target near me so he probably had his transponder turned off. Being in an arsa under ATC control, you tend not to expect another aircraft to pop up nearby unannounced. I should have seen him sooner even though ATC didn't call him out. There isn't much you can do when someone intentionally tries to avoid radar by turning off his transponder to bust an arsa.

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Original NASA ASRS Text

Title: CLOSE PROX GA TRAFFIC WATCH ACFT GA SMA SAME TYPE ACFT BUT NOT TRAFFIC WATCH.

Narrative: OTHER ACFT WAS SAME MAKE AS DESCRIBED ABOVE, KNOWN TO BE EQUIPPED WITH A WORKING TRANSPONDER. I WAS DOING TFC RPTING EBND AT 1800' MSL. I WAS IN CONTINUOUS COM WITH PVD TWR. THE TWR DID NOT CALL OUT ANY TFC TO ME. THE OTHER ACFT APPEARED SUDDENLY APCHING ME GOING NBOUND AT ABOUT 1900' MSL. HE CLBED AND I DOVE. WE AVOIDED EACH OTHER BY ABOUT 100' VERTICALLY. NEITHER PVD TWR NOR QUONSET APCH HAD A TARGET NEAR ME SO HE PROBABLY HAD HIS TRANSPONDER TURNED OFF. BEING IN AN ARSA UNDER ATC CTL, YOU TEND NOT TO EXPECT ANOTHER ACFT TO POP UP NEARBY UNANNOUNCED. I SHOULD HAVE SEEN HIM SOONER EVEN THOUGH ATC DIDN'T CALL HIM OUT. THERE ISN'T MUCH YOU CAN DO WHEN SOMEONE INTENTIONALLY TRIES TO AVOID RADAR BY TURNING OFF HIS TRANSPONDER TO BUST AN ARSA.

Data retrieved from NASA's ASRS site as of August 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.