EMB120 crew was accused of takeoff without clearance at dfw.

Attributes
ACN	529306
Time
Date	200111
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : dfw.tower
Operator	common carrier : air carrier
Make Model Name	Brasilia EMB-120 All Series
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : dfw.tower
Operator	common carrier : air carrier
Make Model Name	Brasilia EMB-120 All Series
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4000 flight time type : 600
ASRS Report	529306
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued advisory none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

I was captain on XXX airline and was taxiing out for takeoff on taxiway left for runway 17R. I was taxiing behind a company brasilia (EMB120) when tower cleared him for takeoff. He then called us and also cleared us for takeoff behind company. This did seem normal as I often get takeoff clrncs close behind departing traffic at busy airports. My first officer read back the clearance and I continued taxi onto the runway as company was departing and my first officer was running the checklist. I also turned on all external lights, except for landing lights (which I let the first officer turn on at the start of takeoff roll) to remind myself that we do have takeoff clearance. It was the first officer's turn to fly, so he started takeoff normal. 300 ft AGL above runway 17R, tower called us and asked us if we were aware that we took off without a takeoff clearance. I told him no, we had a takeoff clearance. He said ok. We continued departure and flight as normal to ZZZ.

Original NASA ASRS Text

Title: EMB120 CREW WAS ACCUSED OF TKOF WITHOUT CLRNC AT DFW.

Narrative: I WAS CAPT ON XXX AIRLINE AND WAS TAXIING OUT FOR TKOF ON TXWY L FOR RWY 17R. I WAS TAXIING BEHIND A COMPANY BRASILIA (EMB120) WHEN TWR CLRED HIM FOR TKOF. HE THEN CALLED US AND ALSO CLRED US FOR TKOF BEHIND COMPANY. THIS DID SEEM NORMAL AS I OFTEN GET TKOF CLRNCS CLOSE BEHIND DEPARTING TFC AT BUSY ARPTS. MY FO READ BACK THE CLRNC AND I CONTINUED TAXI ONTO THE RWY AS COMPANY WAS DEPARTING AND MY FO WAS RUNNING THE CHKLIST. I ALSO TURNED ON ALL EXTERNAL LIGHTS, EXCEPT FOR LNDG LIGHTS (WHICH I LET THE FO TURN ON AT THE START OF TKOF ROLL) TO REMIND MYSELF THAT WE DO HAVE TKOF CLRNC. IT WAS THE FO'S TURN TO FLY, SO HE STARTED TKOF NORMAL. 300 FT AGL ABOVE RWY 17R, TWR CALLED US AND ASKED US IF WE WERE AWARE THAT WE TOOK OFF WITHOUT A TKOF CLRNC. I TOLD HIM NO, WE HAD A TKOF CLRNC. HE SAID OK. WE CONTINUED DEP AND FLT AS NORMAL TO ZZZ.

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.