Air carrier departure came in close to an small transport within the airport arsa.

Attributes
ACN	140308
Time
Date	199003
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : psm airport : pwm
State Reference	ME
Altitude	msl bound lower : 3000 msl bound upper : 3300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pwm
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : initial
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 100 flight time total : 10000 flight time type : 3000
ASRS Report	140308
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 10000 flight time type : 7000
ASRS Report	140261
Events
Anomaly	non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 499 vertical : 499
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

During initial climb out from pwm, with initial clearance to 3000' followed by clearance to 10000', climbing through approximately 2900' departure control (119.75) advised us of an aircraft at 10-11 O'clock and told us to level at 3000' (we were cleared to 10000'). Aircraft was approximately 1/2 mi, nebnd, closing rapidly, when we first saw the small light twin engine aircraft. We were level (from maximum climb rate) by 3300'. Sep appeared to be less than 500' vertical and horizontal. FAA inspector (based at pwm) was aboard jump seat and confirms all above.

Original NASA ASRS Text

Title: ACR DEP CAME IN CLOSE TO AN SMT WITHIN THE ARPT ARSA.

Narrative: DURING INITIAL CLBOUT FROM PWM, WITH INITIAL CLRNC TO 3000' FOLLOWED BY CLRNC TO 10000', CLBING THROUGH APPROX 2900' DEP CTL (119.75) ADVISED US OF AN ACFT AT 10-11 O'CLOCK AND TOLD US TO LEVEL AT 3000' (WE WERE CLRED TO 10000'). ACFT WAS APPROX 1/2 MI, NEBND, CLOSING RAPIDLY, WHEN WE FIRST SAW THE SMALL LIGHT TWIN ENG ACFT. WE WERE LEVEL (FROM MAX CLB RATE) BY 3300'. SEP APPEARED TO BE LESS THAN 500' VERT AND HORIZ. FAA INSPECTOR (BASED AT PWM) WAS ABOARD JUMP SEAT AND CONFIRMS ALL ABOVE.

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.