Light transport begins takeoff without clearance while another aircraft begins takeoff on intersecti...

Attributes
ACN	234927
Time
Date	199302
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cmi
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : takeoff
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 220 flight time total : 5200 flight time type : 2800
ASRS Report	234927
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance non adherence : far other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were told to taxi into position and hold. After we were in position I heard a plane cleared for takeoff. I didn't hear the words 'air carrier flight number' so I looked at the captain with a questioning look. He nodded yes so I read back the clearance air carrier flight number cleared for takeoff. I did the takeoff checklist and we started our takeoff, after a couple of seconds the captain noticed a plane taking off on the intersecting runway and he pulled the power back and we stopped. At that moment the tower also told us to stop. I thought the other aircraft had taken off without clearance so asked the tower. To my surprise it was us who had not received a clearance. I relied on the captain when I should have asked for the clearance to be repeated. Cmi tower also must not have heard my readback of the clearance. The captain was on a 8-HR reduced rest with less than 7 hours sleep. Mistakes like this will keep happening as long as tired crews are manning our planes. Reduced rest doesn't work and is very dangerous. The regulations must be changed so that reduced rest is not allows.

Original NASA ASRS Text

Title: LTT BEGINS TKOF WITHOUT CLRNC WHILE ANOTHER ACFT BEGINS TKOF ON INTERSECTING RWY.

Narrative: WE WERE TOLD TO TAXI INTO POS AND HOLD. AFTER WE WERE IN POS I HEARD A PLANE CLRED FOR TKOF. I DIDN'T HEAR THE WORDS 'ACR FLT NUMBER' SO I LOOKED AT THE CAPT WITH A QUESTIONING LOOK. HE NODDED YES SO I READ BACK THE CLRNC ACR FLT NUMBER CLRED FOR TKOF. I DID THE TKOF CHKLIST AND WE STARTED OUR TKOF, AFTER A COUPLE OF SECONDS THE CAPT NOTICED A PLANE TAKING OFF ON THE INTERSECTING RWY AND HE PULLED THE PWR BACK AND WE STOPPED. AT THAT MOMENT THE TWR ALSO TOLD US TO STOP. I THOUGHT THE OTHER ACFT HAD TAKEN OFF WITHOUT CLRNC SO ASKED THE TWR. TO MY SURPRISE IT WAS US WHO HAD NOT RECEIVED A CLRNC. I RELIED ON THE CAPT WHEN I SHOULD HAVE ASKED FOR THE CLRNC TO BE REPEATED. CMI TWR ALSO MUST NOT HAVE HEARD MY READBACK OF THE CLRNC. THE CAPT WAS ON A 8-HR REDUCED REST WITH LESS THAN 7 HRS SLEEP. MISTAKES LIKE THIS WILL KEEP HAPPENING AS LONG AS TIRED CREWS ARE MANNING OUR PLANES. REDUCED REST DOESN'T WORK AND IS VERY DANGEROUS. THE REGS MUST BE CHANGED SO THAT REDUCED REST IS NOT ALLOWS.

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.

Light transport begins takeoff without clearance while another aircraft begins takeoff on intersecting runway.