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A corporate pilot took off on the dsm runway 23 parallel taxiway because he misinterpreted the 5-23 runway sign and did not realize that the runway was beyond the sign.
| Attributes | |
| ACN | 974126 |
| Time | |
| Date | 201110 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | DSM.Airport |
| State Reference | IA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Small Aircraft Low Wing 1 Eng Fixed Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Takeoff |
| Route In Use | Direct |
| Flight Plan | IFR |
| Person 1 | |
| Function | Single Pilot Pilot Flying |
| Qualification | Flight Crew Commercial Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 29 Flight Crew Total 8885 Flight Crew Type 6944 |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Ground Incursion Taxiway Inflight Event / Encounter Other / Unknown |
Narrative:
This was my first trip into dsm. I asked for progressive taxi to runway 23. I was instructed taxiway alpha to bravo; hold short at bravo. I repeated the instructions and taxied to bravo. After run up I was cleared for takeoff on 23. I taxied forward to the sign 5-23 turned left and took off. My mistake; I was on taxiway bravo. I [was] mistaken by the sign 5-23 that I was on the runway. The runway was actually on the other side of the sign. Tower caught the error but I was already in the air. He said to continue the climb. I should have studied the airport diagram before taxi. After the fact however; looking at the airport diagram alpha doesn't seem to intersect with bravo.
Original NASA ASRS Text
Title: A Corporate pilot took off on the DSM Runway 23 parallel taxiway because he misinterpreted the 5-23 runway sign and did not realize that the runway was beyond the sign.
Narrative: This was my first trip into DSM. I asked for progressive taxi to Runway 23. I was instructed Taxiway Alpha to Bravo; hold short at Bravo. I repeated the instructions and taxied to Bravo. After run up I was cleared for takeoff on 23. I taxied forward to the sign 5-23 turned left and took off. My mistake; I was on Taxiway Bravo. I [was] mistaken by the sign 5-23 that I was on the runway. The runway was actually on the other side of the sign. Tower caught the error but I was already in the air. He said to continue the climb. I should have studied the airport diagram before taxi. After the fact however; looking at the airport diagram Alpha doesn't seem to intersect with Bravo.
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.