Cessna 152 instructor, with student, took off by mistake when they had not believed that their takeo...

Attributes
ACN	548078
Time
Date	200205
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dpa.airport
State Reference	IL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : dpa.tower
Operator	general aviation : instructional
Make Model Name	Cessna 152
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : dpa.tower
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 50 flight time total : 380 flight time type : 80
ASRS Report	548078
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	conflict : ground less severe incursion : runway non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

The following runway incursion/missed ATC command incident was the result of three primary causes. Two aircraft in the local area with similar call signs (our aircraft, and another aircraft) making it difficult to know whom the controller was talking to. Missed ATC command while explaining a takeoff maneuver to a student pilot. (The command was hard to hear and we thought the controller was talking to the other aircraft). The ATC command came at an unexpected time and place (the controller had just cleared us to take off and we were taking off when the controller changed her mind and asked us to not take off and stay in position). The event happened as follows: a student and myself had completed our run-up when we asked for and received permission to take off on runway 20R at dpa (dupage airport). At this time it was noticed that another aircraft in the area had a similar call sign to our call sign (ours was and the other I believe was). We then lined up on the runway and I started to explain what was to happen next. While I was explaining, the controller changed her mind and asked us not to take off but because I was talking I did not hear what the controller was saying and I heard what I thought was the other aircraft's call sign, so I did not think the controller was talking to us. After all, from our point of view she had just cleared us to take off and I expected her to say something to the other aircraft. From what I understand, the controller had also cleared an aircraft to land on a crossing runway and the separation time did not work out (because we took off slower than the controller wanted) and when we took off, we crossed in front of the other aircraft's landing runway. How to prevent in the future: try better at listening to controllers and keep talking to a minimum while in controled airspace. This is often a hard thing to do for an instructor (teaching and flying at the same time). Be more alert when another aircraft has a similar call sign.

Original NASA ASRS Text

Title: CESSNA 152 INSTRUCTOR, WITH STUDENT, TOOK OFF BY MISTAKE WHEN THEY HAD NOT BELIEVED THAT THEIR TKOF HAD BEEN CANCELED, CAUSING THEM TO CROSS IN FRONT OF ANOTHER ACFT LNDG ON AN INTERSECTING RWY.

Narrative: THE FOLLOWING RWY INCURSION/MISSED ATC COMMAND INCIDENT WAS THE RESULT OF THREE PRIMARY CAUSES. TWO ACFT IN THE LCL AREA WITH SIMILAR CALL SIGNS (OUR ACFT, AND ANOTHER ACFT) MAKING IT DIFFICULT TO KNOW WHOM THE CTLR WAS TALKING TO. MISSED ATC COMMAND WHILE EXPLAINING A TKOF MANEUVER TO A STUDENT PLT. (THE COMMAND WAS HARD TO HEAR AND WE THOUGHT THE CTLR WAS TALKING TO THE OTHER ACFT). THE ATC COMMAND CAME AT AN UNEXPECTED TIME AND PLACE (THE CTLR HAD JUST CLRED US TO TAKE OFF AND WE WERE TAKING OFF WHEN THE CTLR CHANGED HER MIND AND ASKED US TO NOT TAKE OFF AND STAY IN POSITION). THE EVENT HAPPENED AS FOLLOWS: A STUDENT AND MYSELF HAD COMPLETED OUR RUN-UP WHEN WE ASKED FOR AND RECEIVED PERMISSION TO TAKE OFF ON RWY 20R AT DPA (DUPAGE ARPT). AT THIS TIME IT WAS NOTICED THAT ANOTHER ACFT IN THE AREA HAD A SIMILAR CALL SIGN TO OUR CALL SIGN (OURS WAS AND THE OTHER I BELIEVE WAS). WE THEN LINED UP ON THE RWY AND I STARTED TO EXPLAIN WHAT WAS TO HAPPEN NEXT. WHILE I WAS EXPLAINING, THE CTLR CHANGED HER MIND AND ASKED US NOT TO TAKE OFF BUT BECAUSE I WAS TALKING I DID NOT HEAR WHAT THE CTLR WAS SAYING AND I HEARD WHAT I THOUGHT WAS THE OTHER ACFT'S CALL SIGN, SO I DID NOT THINK THE CTLR WAS TALKING TO US. AFTER ALL, FROM OUR POINT OF VIEW SHE HAD JUST CLRED US TO TAKE OFF AND I EXPECTED HER TO SAY SOMETHING TO THE OTHER ACFT. FROM WHAT I UNDERSTAND, THE CTLR HAD ALSO CLRED AN ACFT TO LAND ON A CROSSING RWY AND THE SEPARATION TIME DID NOT WORK OUT (BECAUSE WE TOOK OFF SLOWER THAN THE CTLR WANTED) AND WHEN WE TOOK OFF, WE CROSSED IN FRONT OF THE OTHER ACFT'S LNDG RWY. HOW TO PREVENT IN THE FUTURE: TRY BETTER AT LISTENING TO CTLRS AND KEEP TALKING TO A MINIMUM WHILE IN CTLED AIRSPACE. THIS IS OFTEN A HARD THING TO DO FOR AN INSTRUCTOR (TEACHING AND FLYING AT THE SAME TIME). BE MORE ALERT WHEN ANOTHER ACFT HAS A SIMILAR CALL SIGN.

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.

Cessna 152 instructor, with student, took off by mistake when they had not believed that their takeoff had been canceled, causing them to cross in front of another aircraft landing on an intersecting runway.