Narrative:

I was working iad south arrival and handed off a C-12 to the north arrival/final controller at 4000 ft on a vector of 010 degrees to parallel iad final and departure corridors. C-12 was southeast of airport at time of handoff. Just prior to frequency change, the C-12 requested direct aml. I told the aircraft to make the request on the next frequency and changed communication. I told north arrival/final that the C-12 was her control. Commuter aircraft Y was departing runway 19L and was issued a right turn heading 330 degrees climbing to 4000 ft. This turn put the aircraft into my runway 12 arrival airspace, but departure was using pre-coordinated climb procedures ('look and go' reference any runway 12 arrs). This procedure requires that he quick look my position. North arrival/final cleared C-12 direct aml, depart aml heading 330 degrees, vectors for a visual approach at jyo. C-12 was left at 4000 until passing aml due to traffic high on approach to runway 19R. Then north arrival/final issued descent clearance. When pending conflict was noted, the north arrival/final controller instructed the C-12 to level off. Departure aircraft also leveled off. North arrival/final and departure coordinated, issued diverging headings and continued the respective climb and descent. Departure did not see the C-12 over aml because it was on an north tag (would not appear if he quick looked me (south)) and because C-12 was over radar main bang. His departure also was within main bang area.

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Original NASA ASRS Text

Title: MIL ACFT HAD LTSS FROM COMMUTER Y. SYS ERROR.

Narrative: I WAS WORKING IAD S ARR AND HANDED OFF A C-12 TO THE N ARR/FINAL CTLR AT 4000 FT ON A VECTOR OF 010 DEGS TO PARALLEL IAD FINAL AND DEP CORRIDORS. C-12 WAS SE OF ARPT AT TIME OF HDOF. JUST PRIOR TO FREQ CHANGE, THE C-12 REQUESTED DIRECT AML. I TOLD THE ACFT TO MAKE THE REQUEST ON THE NEXT FREQ AND CHANGED COM. I TOLD N ARR/FINAL THAT THE C-12 WAS HER CTL. COMMUTER ACFT Y WAS DEPARTING RWY 19L AND WAS ISSUED A R TURN HDG 330 DEGS CLBING TO 4000 FT. THIS TURN PUT THE ACFT INTO MY RWY 12 ARR AIRSPACE, BUT DEP WAS USING PRE-COORDINATED CLB PROCS ('LOOK AND GO' REF ANY RWY 12 ARRS). THIS PROC REQUIRES THAT HE QUICK LOOK MY POS. N ARR/FINAL CLRED C-12 DIRECT AML, DEPART AML HDG 330 DEGS, VECTORS FOR A VISUAL APCH AT JYO. C-12 WAS LEFT AT 4000 UNTIL PASSING AML DUE TO TFC HIGH ON APCH TO RWY 19R. THEN N ARR/FINAL ISSUED DSCNT CLRNC. WHEN PENDING CONFLICT WAS NOTED, THE N ARR/FINAL CTLR INSTRUCTED THE C-12 TO LEVEL OFF. DEP ACFT ALSO LEVELED OFF. N ARR/FINAL AND DEP COORDINATED, ISSUED DIVERGING HDGS AND CONTINUED THE RESPECTIVE CLB AND DSCNT. DEP DID NOT SEE THE C-12 OVER AML BECAUSE IT WAS ON AN N TAG (WOULD NOT APPEAR IF HE QUICK LOOKED ME (S)) AND BECAUSE C-12 WAS OVER RADAR MAIN BANG. HIS DEP ALSO WAS WITHIN MAIN BANG AREA.

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.