Medium large transport almost taxies onto active runway. Aircraft departing.

Attributes
ACN	289938
Time
Date	199411
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sdf
State Reference	KY
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mke
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground other : taxi
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Shorts SD-330-200/Utt/Sherpa
Operating Under FAR Part	Part 135
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp
Experience	flight time last 90 days : 210 flight time total : 7000 flight time type : 210
ASRS Report	289938
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : ground critical incursion : runway non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Captain was taxiing aircraft for takeoff runway 29. We had a cockpit jumpseater at the time and a discussion between the captain and the jumpseater was taking place. At some point, the captain thought he had been cleared to taxi to runway 1 and changed his taxi course accordingly. Did not realize this error. ATC then informed us to hold our position. At which point I yelled 'stop' and put my feet on the brakes. The captain immediately stopped the aircraft just short of runway 29/11. A shorts 330 aircraft departed runway 29 at this point. No further action was taken by ATC.

Original NASA ASRS Text

Title: MLG ALMOST TAXIES ONTO ACTIVE RWY. ACFT DEPARTING.

Narrative: CAPT WAS TAXIING ACFT FOR TKOF RWY 29. WE HAD A COCKPIT JUMPSEATER AT THE TIME AND A DISCUSSION BTWN THE CAPT AND THE JUMPSEATER WAS TAKING PLACE. AT SOME POINT, THE CAPT THOUGHT HE HAD BEEN CLRED TO TAXI TO RWY 1 AND CHANGED HIS TAXI COURSE ACCORDINGLY. DID NOT REALIZE THIS ERROR. ATC THEN INFORMED US TO HOLD OUR POS. AT WHICH POINT I YELLED 'STOP' AND PUT MY FEET ON THE BRAKES. THE CAPT IMMEDIATELY STOPPED THE ACFT JUST SHORT OF RWY 29/11. A SHORTS 330 ACFT DEPARTED RWY 29 AT THIS POINT. NO FURTHER ACTION WAS TAKEN BY ATC.

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.