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Mdw local controller described a runway conflict when an airport vehicle was misidentified and cleared on a runway during an air carrier departure. The reporter sited phraseology as a contributor to the event.
| Attributes | |
| ACN | 903843 |
| Time | |
| Date | 201008 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | MDW.Airport |
| State Reference | IL |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy Ground Event / Encounter Vehicle |
Narrative:
Airport vehicle called for runway inspection; clearly stated runway 4R. Runway complex 31's were in use. Runway 22L was active with a B737 about ready to commence departure roll. The vehicle was on and off runway 22L for the duration of the evening; operating mostly at the arrival end. This time he reversed his operation to the departure end of runway 4R. I mistakenly observed a vehicle at the approach end of runway 22R; and assumed that was the vehicle in question. I stated to proceed as requested and to hold short of all runway 31's. While the B737 was approximately half way down runway 22L and rotating; the vehicle entered the departure end of runway 4R. Asde-X alarmed and the vehicle was instructed to exit runway without delay. Recommendation; do not use the phraseology 'proceed as requested.' if I would of stated 'drive runway 22R and hold short of runway 31R;' the vehicle would of realized the discrepancy and the situation would of been avoided.
Original NASA ASRS Text
Title: MDW Local Controller described a runway conflict when an airport vehicle was misidentified and cleared on a runway during an air carrier departure. The reporter sited phraseology as a contributor to the event.
Narrative: Airport vehicle called for runway inspection; clearly stated Runway 4R. Runway complex 31's were in use. Runway 22L was active with a B737 about ready to commence departure roll. The vehicle was on and off Runway 22L for the duration of the evening; operating mostly at the arrival end. This time he reversed his operation to the departure end of Runway 4R. I mistakenly observed a vehicle at the approach end of Runway 22R; and assumed that was the vehicle in question. I stated to proceed as requested and to hold short of all Runway 31's. While the B737 was approximately half way down Runway 22L and rotating; the vehicle entered the departure end of Runway 4R. ASDE-X alarmed and the vehicle was instructed to exit runway without delay. Recommendation; do not use the phraseology 'proceed as requested.' If I would of stated 'Drive Runway 22R and hold short of Runway 31R;' the vehicle would of realized the discrepancy and the situation would of been avoided.
Data retrieved from NASA's ASRS site as of April 2012 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.