MD90 flight crew has takeoff clearance canceled after starting takeoff roll at sna.

Attributes
ACN	714495
Time
Date	200610
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sna.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : sna.tower
Operator	common carrier : air carrier
Make Model Name	MD-90 Series (DC-9-90) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : sna.tower
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent : approach landing : go around
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 184 flight time total : 10900 flight time type : 2700
ASRS Report	714495
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	non adherence : required legal separation
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Airport
Primary Problem	ATC Human Performance

Narrative:

Sna tower cleared our aircraft into position and hold with another aircraft clearing down the runway and another aircraft on final for runway 29R. As we were going into position sna tower told us to 'power up' and be ready for immediate takeoff when aircraft downfield was clear. We received takeoff clearance as we were still going into position on the runway. Our operating procedures require at sna that we will not release brakes for takeoff until both engine EPR is at least 1.25 EPR with engines stabilized. Just after the captain released the brakes for takeoff; sna tower told us to 'cancel takeoff clearance' and taxi off the runway due to landing traffic behind us. After receiving these instructions our aircraft was on takeoff roll with maximum thrust applied to our engines. I (first officer) was pilot monitoring (not flying). The captain told me to tell him (the controller) unable. I relayed the message to the sna tower controller we were unable to comply since we had already started our takeoff roll. The controller then issued instructions for the aircraft behind us on final to execute a go around. I am not sure if the sna tower controller was aware that we are prohibited from making a 'rolling takeoff' at sna from runway 29R.

Original NASA ASRS Text

Title: MD90 FLT CREW HAS TKOF CLRNC CANCELED AFTER STARTING TKOF ROLL AT SNA.

Narrative: SNA TWR CLRED OUR ACFT INTO POS AND HOLD WITH ANOTHER ACFT CLRING DOWN THE RWY AND ANOTHER ACFT ON FINAL FOR RWY 29R. AS WE WERE GOING INTO POS SNA TWR TOLD US TO 'PWR UP' AND BE READY FOR IMMEDIATE TKOF WHEN ACFT DOWNFIELD WAS CLR. WE RECEIVED TKOF CLRNC AS WE WERE STILL GOING INTO POS ON THE RWY. OUR OPERATING PROCS REQUIRE AT SNA THAT WE WILL NOT RELEASE BRAKES FOR TKOF UNTIL BOTH ENG EPR IS AT LEAST 1.25 EPR WITH ENGS STABILIZED. JUST AFTER THE CAPT RELEASED THE BRAKES FOR TKOF; SNA TWR TOLD US TO 'CANCEL TKOF CLRNC' AND TAXI OFF THE RWY DUE TO LNDG TFC BEHIND US. AFTER RECEIVING THESE INSTRUCTIONS OUR ACFT WAS ON TKOF ROLL WITH MAX THRUST APPLIED TO OUR ENGS. I (FO) WAS PLT MONITORING (NOT FLYING). THE CAPT TOLD ME TO TELL HIM (THE CTLR) UNABLE. I RELAYED THE MESSAGE TO THE SNA TWR CTLR WE WERE UNABLE TO COMPLY SINCE WE HAD ALREADY STARTED OUR TKOF ROLL. THE CTLR THEN ISSUED INSTRUCTIONS FOR THE ACFT BEHIND US ON FINAL TO EXECUTE A GAR. I AM NOT SURE IF THE SNA TWR CTLR WAS AWARE THAT WE ARE PROHIBITED FROM MAKING A 'ROLLING TKOF' AT SNA FROM RWY 29R.

Data retrieved from NASA's ASRS site as of January 2009 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.