Narrative:

Air carrier X filed and was issued iad..colns..hvq..crw. Preferential route changed it to ldn.J134.colns.J6.hvq. The change was thought to be the old route. The filed route was issued; but the preferential route was not suppressed. The aircraft got airborne and the departure control thought air carrier X was issued the preferential route. I realized the error and called departure controller to let him know. No separation was lost. The departure controller fixed the issue in the air. Recommend following through with any changes that are made for issuing the clearance to the pilot and making any changes in the computer before going on to something else. Also; remember to use strip marking. Strip marking was forgotten here and it could have prevented the situation.

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Original NASA ASRS Text

Title: IAD Controller voiced concern regarding the 'lost art' of strip marking providing a recent example of same.

Narrative: Air Carrier X filed and was issued IAD..COLNS..HVQ..CRW. Preferential route changed it to LDN.J134.COLNS.J6.HVQ. The change was thought to be the old route. The filed route was issued; but the preferential route was not suppressed. The Aircraft got airborne and the Departure Control thought Air Carrier X was issued the preferential route. I realized the error and called Departure Controller to let him know. No separation was lost. The Departure Controller fixed the issue in the air. Recommend following through with any changes that are made for issuing the clearance to the pilot and making any changes in the computer before going on to something else. Also; remember to use strip marking. Strip marking was forgotten here and it could have prevented the situation.

Data retrieved from NASA's ASRS site as of July 2013 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.