Close proximity GA-small aircraft air carrier-medium large transport over scy.

Attributes
ACN	120343
Time
Date	198908
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : scy
State Reference	TX
Altitude	msl bound lower : 8000 msl bound upper : 8500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	arrival star : star
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 25 flight time total : 216 flight time type : 25
ASRS Report	120343
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : nmac non adherence : required legal separation other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Clearance was T39 departure cleared to ads via V477 to leona VOR then to scurry VOR then scurry 9 arrival. Frequency was first provided by houston, then ft worth centers. The problem arose when a possible airspace encroachment occurred by an medium large transport air carrier. I responded by calling the controller and asking why I was not informed of this aircraft. The controller's response was 'where was I'. My position was directly over scurry VOR. The controller's next response was that I should be on another frequency. At this time I stated I had not heard a request for a frequency change. Additionally, I had not confirmed a change. I believe the controller believed he had passed me to another sector but in essence forgotten about my flight. Furthermore, I had received no instructions from ATC for at least 1/2 hour, or any xmissions. The solutions are not easy, but one would be a mandatory requirement to break radio silence every 15 or 30 mins if no instructions or xmissions are received by ATC. This could be the aircraft number and altitude providing a mutual verification and to remind controllers of aircraft in their sectors.

Original NASA ASRS Text

Title: CLOSE PROX GA-SMA ACR-MLG OVER SCY.

Narrative: CLRNC WAS T39 DEP CLRED TO ADS VIA V477 TO LEONA VOR THEN TO SCURRY VOR THEN SCURRY 9 ARR. FREQ WAS FIRST PROVIDED BY HOUSTON, THEN FT WORTH CENTERS. THE PROBLEM AROSE WHEN A POSSIBLE AIRSPACE ENCROACHMENT OCCURRED BY AN MLG AIR CARRIER. I RESPONDED BY CALLING THE CTLR AND ASKING WHY I WAS NOT INFORMED OF THIS ACFT. THE CTLR'S RESPONSE WAS 'WHERE WAS I'. MY POSITION WAS DIRECTLY OVER SCURRY VOR. THE CTLR'S NEXT RESPONSE WAS THAT I SHOULD BE ON ANOTHER FREQ. AT THIS TIME I STATED I HAD NOT HEARD A REQUEST FOR A FREQ CHANGE. ADDITIONALLY, I HAD NOT CONFIRMED A CHANGE. I BELIEVE THE CTLR BELIEVED HE HAD PASSED ME TO ANOTHER SECTOR BUT IN ESSENCE FORGOTTEN ABOUT MY FLT. FURTHERMORE, I HAD RECEIVED NO INSTRUCTIONS FROM ATC FOR AT LEAST 1/2 HR, OR ANY XMISSIONS. THE SOLUTIONS ARE NOT EASY, BUT ONE WOULD BE A MANDATORY REQUIREMENT TO BREAK RADIO SILENCE EVERY 15 OR 30 MINS IF NO INSTRUCTIONS OR XMISSIONS ARE RECEIVED BY ATC. THIS COULD BE THE ACFT NUMBER AND ALT PROVIDING A MUTUAL VERIFICATION AND TO REMIND CTLRS OF ACFT IN THEIR SECTORS.

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.