A small aircraft pilot at hyi reports an aircraft landing runway 31 when six aircraft are landing runway 35. The jet then back taxied on runway 35 unannounced on CTAF and caused a near midair collision as aircraft executed a go around.

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Attributes
ACN	809100
Time
Date	200810
Place
Locale Reference	airport : hyi.airport
State Reference	TX
Altitude	agl single value : 100
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft High Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	None
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 65 flight time total : 625 flight time type : 45
ASRS Report	809100
Events
Anomaly	conflict : ground critical non adherence : far non adherence : published procedure other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : executed go around
Miss Distance	horizontal : 100 vertical : 0
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

6 aircraft were in the vicinity of hyi airport; including the conflicting aircraft. All aircraft; except the conflict; were in the traffic pattern for runway 35. The conflict traffic called 5 mi out on the right base for runway 31 (improper direction for pattern on that runway; which is l-hand traffic). The pattern was adjusted by the aircraft in front of us who made a right 360 degree turn to avoid conflict with the opposite runway traffic. We proceeded with our pattern and the right 360 degree traffic (a cirrus SR22) rejoined the pattern behind us. The conflict aircraft citation called final for runway 31 and; even though the aircraft was not in sight; I determined him to not be a factor as we were still on the downwind leg. On short final; I noticed the citation (conflict aircraft) was directly off our nose in a 'back-taxi' on runway 35; that was not announced. Full power was applied and the go around was initiated; however; the airplane's poor climb performance led to a near miss with the ground traffic who was indeed on the wrong runway performing an unannounced back-taxi.

Original NASA ASRS Text

Title: A SMALL ACFT PILOT AT HYI REPORTS AN ACFT LNDG RWY 31 WHEN SIX ACFT ARE LNDG RWY 35. THE JET THEN BACK TAXIED ON RWY 35 UNANNOUNCED ON CTAF AND CAUSED A NMAC AS ACFT EXECUTED A GAR.

Narrative: 6 ACFT WERE IN THE VICINITY OF HYI ARPT; INCLUDING THE CONFLICTING ACFT. ALL ACFT; EXCEPT THE CONFLICT; WERE IN THE TFC PATTERN FOR RWY 35. THE CONFLICT TFC CALLED 5 MI OUT ON THE R BASE FOR RWY 31 (IMPROPER DIRECTION FOR PATTERN ON THAT RWY; WHICH IS L-HAND TFC). THE PATTERN WAS ADJUSTED BY THE ACFT IN FRONT OF US WHO MADE A R 360 DEG TURN TO AVOID CONFLICT WITH THE OPPOSITE RWY TFC. WE PROCEEDED WITH OUR PATTERN AND THE R 360 DEG TFC (A CIRRUS SR22) REJOINED THE PATTERN BEHIND US. THE CONFLICT ACFT CITATION CALLED FINAL FOR RWY 31 AND; EVEN THOUGH THE ACFT WAS NOT IN SIGHT; I DETERMINED HIM TO NOT BE A FACTOR AS WE WERE STILL ON THE DOWNWIND LEG. ON SHORT FINAL; I NOTICED THE CITATION (CONFLICT ACFT) WAS DIRECTLY OFF OUR NOSE IN A 'BACK-TAXI' ON RWY 35; THAT WAS NOT ANNOUNCED. FULL PWR WAS APPLIED AND THE GAR WAS INITIATED; HOWEVER; THE AIRPLANE'S POOR CLB PERFORMANCE LED TO A NEAR MISS WITH THE GND TFC WHO WAS INDEED ON THE WRONG RWY PERFORMING AN UNANNOUNCED BACK-TAXI.

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