Small transport had conflict with S76 in traffic pattern. See and avoid concept.

Attributes
ACN	305860
Time
Date	199505
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : wal
State Reference	VA
Altitude	msl bound lower : 1200 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : wal
Operator	other
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Flight Phase	climbout : initial
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Make Model Name	S-76/S-76 Mark II
Operating Under FAR Part	other : other
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 140 flight time total : 6974 flight time type : 658
ASRS Report	305860
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 2000 vertical : 800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Departing wal runway 22 with a S76 doing some sort of testing in the traffic pattern runway 4. We received an IFR to depart wal runway 22 just as the S76 was turning a left downwind turn off runway 4, so he was to the west of the runway. We received takeoff clearance direct pxt, which is also off to the northwest. We departed runway 22 and turned as cleared when we saw the S76 at what looked like about 2000 ft. We leveled off at 1200 ft till clear. There was no need for evasive maneuvering, but it would have been better if we had either been warned of the S76 or given a left hand turn direct pxt.

Original NASA ASRS Text

Title: SMT HAD CONFLICT WITH S76 IN TFC PATTERN. SEE AND AVOID CONCEPT.

Narrative: DEPARTING WAL RWY 22 WITH A S76 DOING SOME SORT OF TESTING IN THE TFC PATTERN RWY 4. WE RECEIVED AN IFR TO DEPART WAL RWY 22 JUST AS THE S76 WAS TURNING A L DOWNWIND TURN OFF RWY 4, SO HE WAS TO THE W OF THE RWY. WE RECEIVED TKOF CLRNC DIRECT PXT, WHICH IS ALSO OFF TO THE NW. WE DEPARTED RWY 22 AND TURNED AS CLRED WHEN WE SAW THE S76 AT WHAT LOOKED LIKE ABOUT 2000 FT. WE LEVELED OFF AT 1200 FT TILL CLR. THERE WAS NO NEED FOR EVASIVE MANEUVERING, BUT IT WOULD HAVE BEEN BETTER IF WE HAD EITHER BEEN WARNED OF THE S76 OR GIVEN A L HAND TURN DIRECT PXT.

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.