C441 pilot reports close encounter with another aircraft on departure from iws.

Attributes
ACN	717652
Time
Date	200611
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iws.airport
State Reference	TX
Altitude	agl single value : 500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : i90.tracon
Operator	general aviation : personal
Make Model Name	Conquest I/Conquest II
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Flight Plan	IFR
Aircraft 2
Make Model Name	Beechcraft Twin Turboprop Jet Undifferentiated or Other Model
Flight Phase	descent : approach
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 33 flight time total : 5133 flight time type : 3127
ASRS Report	717652
Person 2
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Supplementary
Problem Areas	Airport Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We were holding at runway 33 at iws airport and just received our IFR clearance. After looking at final to be sure no one was on final; we announced on unicom frequency the taking of runway 33 and proceeded to take off. When +/-500 ft altitude and +/-1 mi from departure end of runway; we were passed on right side and close; by twin (king air?). Have no idea where he came from or where he went. Prior to and during takeoff; we never heard any announcement on unicom frequency from any 'traffic' at iws. Perhaps that airplane was on distant final or elsewhere when we took the runway. If so; we never saw him; nor did we hear him. Scary stuff!

Original NASA ASRS Text

Title: C441 PLT RPTS CLOSE ENCOUNTER WITH ANOTHER ACFT ON DEP FROM IWS.

Narrative: WE WERE HOLDING AT RWY 33 AT IWS ARPT AND JUST RECEIVED OUR IFR CLRNC. AFTER LOOKING AT FINAL TO BE SURE NO ONE WAS ON FINAL; WE ANNOUNCED ON UNICOM FREQ THE TAKING OF RWY 33 AND PROCEEDED TO TAKE OFF. WHEN +/-500 FT ALT AND +/-1 MI FROM DEP END OF RWY; WE WERE PASSED ON R SIDE AND CLOSE; BY TWIN (KING AIR?). HAVE NO IDEA WHERE HE CAME FROM OR WHERE HE WENT. PRIOR TO AND DURING TKOF; WE NEVER HEARD ANY ANNOUNCEMENT ON UNICOM FREQ FROM ANY 'TFC' AT IWS. PERHAPS THAT AIRPLANE WAS ON DISTANT FINAL OR ELSEWHERE WHEN WE TOOK THE RWY. IF SO; WE NEVER SAW HIM; NOR DID WE HEAR HIM. SCARY STUFF!

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