Commuter aircraft deviating around WX comes in close proximity to a departure aircraft.

Attributes
ACN	179856
Time
Date	199106
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dca
State Reference	DC
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dca artcc : mmid
Operator	common carrier : air carrier
Make Model Name	Small Transport
Flight Phase	cruise other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : takeoff
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 5
ASRS Report	179856
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	non adherence : far non adherence : published procedure non adherence : required legal separation other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Intra Facility Coordination Failure

Narrative:

Air carrier X, an small transport inbound from balance, was deviating for WX. I (fl) coordinated with DR2. The supervisor changed beacons and I lost radar with air carrier X. I instructed him to proceed to dca 010 radial 10 DME and hold north and hold him radar contact lost. 2 mins later the supervisor changed back to the old beacon channel and I observed air carrier X over the northwest side of P56B. I told air carrier X to turn heading 090 degrees. He told me he would just continue swbnd. I told him to make an immediately turn east to 090 degrees and pointed out traffic departing dca. Air carrier X said he had traffic in sight and I established visibility sep. 1) supervisor should be more familiar with equipment and now allow a lack of radar for 2 mins. 2) DR2 should not climb out of 2000' until he knows where air carrier X is. 3) air carrier X should proceed to holding fix immediately or advise. 4) F2 should attempt to locate air carrier X by azimuth as well as distance. 5) air carrier X should turn to east when instructed. 6) controllers should recoordinate when extraordinary items occur.

Original NASA ASRS Text

Title: COMMUTER ACFT DEVIATING AROUND WX COMES IN CLOSE PROX TO A DEP ACFT.

Narrative: ACR X, AN SMT INBND FROM BAL, WAS DEVIATING FOR WX. I (FL) COORDINATED WITH DR2. THE SUPVR CHANGED BEACONS AND I LOST RADAR WITH ACR X. I INSTRUCTED HIM TO PROCEED TO DCA 010 RADIAL 10 DME AND HOLD N AND HOLD HIM RADAR CONTACT LOST. 2 MINS LATER THE SUPVR CHANGED BACK TO THE OLD BEACON CHANNEL AND I OBSERVED ACR X OVER THE NW SIDE OF P56B. I TOLD ACR X TO TURN HDG 090 DEGS. HE TOLD ME HE WOULD JUST CONTINUE SWBND. I TOLD HIM TO MAKE AN IMMEDIATELY TURN E TO 090 DEGS AND POINTED OUT TFC DEPARTING DCA. ACR X SAID HE HAD TFC IN SIGHT AND I ESTABLISHED VIS SEP. 1) SUPVR SHOULD BE MORE FAMILIAR WITH EQUIP AND NOW ALLOW A LACK OF RADAR FOR 2 MINS. 2) DR2 SHOULD NOT CLB OUT OF 2000' UNTIL HE KNOWS WHERE ACR X IS. 3) ACR X SHOULD PROCEED TO HOLDING FIX IMMEDIATELY OR ADVISE. 4) F2 SHOULD ATTEMPT TO LOCATE ACR X BY AZIMUTH AS WELL AS DISTANCE. 5) ACR X SHOULD TURN TO E WHEN INSTRUCTED. 6) CTLRS SHOULD RECOORDINATE WHEN EXTRAORDINARY ITEMS OCCUR.

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.