Narrative:

Flight operations reported that we taxied before deice was completed. Deice process underway; first officer (first officer) was communicating with de-ice crew and responded to 'deicing complete' radio call. We both saw a deice truck drive away on the service lane. Multiple deicing events were taking place on same frequency. Performed cross bleed start; called for taxi; cleared left and right; and to follow company traffic off left.tower informed us to call company and return to gate. Company said they needed to re-deice us as it was not complete and that we taxied while deice truck was still spraying. We responded that we acknowledged deicing complete as well as saw a truck drive away. In discussing the incident; the first officer and I thought they may have confused tail numbers as the frequency and ramp were very congested. Completed deicing and departed uneventfully. All checklists and fom/aom procedures were followed. It is now obvious that we took a similar call sign deicing complete call and assumed that our crew was clear based on the truck we saw on the service road. Also; the first officer cleared the right side for taxi just before the truck came around the corner of the wing. Suggestions for avoiding future miscommunication errors include requiring a visual wave off from iceman as is required from pushback crew and a dedicated frequency per truck so as to avoid other call signs.

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Original NASA ASRS Text

Title: The flight crew departing MDW inadvertently accepted a 'de-icing complete' transmission intended for another aircraft and had to be recalled prior to takeoff to complete the de-icing process.

Narrative: Flight Operations reported that we taxied before deice was completed. Deice process underway; First Officer (FO) was communicating with de-ice crew and responded to 'deicing complete' radio call. We both saw a deice truck drive away on the service lane. Multiple deicing events were taking place on same frequency. Performed cross bleed start; called for taxi; cleared left and right; and to follow Company traffic off left.Tower informed us to call Company and return to gate. Company said they needed to re-deice us as it was not complete and that we taxied while deice truck was still spraying. We responded that we acknowledged deicing complete as well as saw a truck drive away. In discussing the incident; the FO and I thought they may have confused tail numbers as the frequency and ramp were very congested. Completed deicing and departed uneventfully. All checklists and FOM/AOM procedures were followed. It is now obvious that we took a similar call sign deicing complete call and assumed that our Crew was clear based on the truck we saw on the service road. Also; the FO cleared the right side for taxi just before the truck came around the corner of the wing. Suggestions for avoiding future miscommunication errors include requiring a visual wave off from Iceman as is required from Pushback Crew and a dedicated frequency per truck so as to avoid other call signs.

Data retrieved from NASA's ASRS site 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.