Sfo controller voiced concern regarding the very different same company pilot techniques during take...

Narrative:

An A320 was cleared for take off with traffic about 2 3/4 miles on final. The aircraft took forever to start their roll. With a 15 KT headwind; I used 1 1/2 miles as a cutoff with some movement and clearance acknowledged. The A320 still was not accelerating; when I cancelled their take off clearance. As such; it was at this time; the aircraft was powering up and then down as they acknowledged the aborted departure. Of note; the aircraft was bound for one place; and the next departure in sequence was same company; same model; going to another. The performance of the next departure roll was incredibly different. Both rotated at about the same take off distance. This is mind boggling when observed; and definitely a safety hazard for an airport with intersecting runways. These pilots need to be performing more similar in this situation; as it is undoubtedly an inconsistency in flying technique. It is unacceptable that this occurs; as this has involved unsafe aborted departures; and unfair go around's for arrivals.

Original NASA ASRS Text

Title: SFO Controller voiced concern regarding the very different same company pilot techniques during takeoff's; the reporter noting performance within the same airline should be more consistent.

Narrative: An A320 was cleared for take off with traffic about 2 3/4 miles on final. The aircraft took forever to start their roll. With a 15 KT headwind; I used 1 1/2 miles as a cutoff with some movement and clearance acknowledged. The A320 still was not accelerating; when I cancelled their take off clearance. As such; it was at this time; the aircraft was powering up and then down as they acknowledged the aborted departure. Of note; the aircraft was bound for one place; and the next departure in sequence was same company; same model; going to another. The performance of the next departure roll was incredibly different. Both rotated at about the same take off distance. This is mind boggling when observed; and definitely a safety hazard for an airport with intersecting runways. These pilots need to be performing more similar in this situation; as it is undoubtedly an inconsistency in flying technique. It is unacceptable that this occurs; as this has involved unsafe aborted departures; and unfair go around's for arrivals.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1010235
Time
Date	201205
Local Time Of Day	1201-1800
Place
Locale Reference	SFO.Airport
State Reference	CA
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Aircraft 2
Make Model Name	B737-500
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Less Severe Deviation - Procedural Other / Unknown

Sfo controller voiced concern regarding the very different same company pilot techniques during takeoff's; the reporter noting performance within the same airline should be more consistent.