Improper takeoff data computation.

Attributes
ACN	294470
Time
Date	199501
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sna
State Reference	CA
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	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 268 flight time total : 4815 flight time type : 1485
ASRS Report	294470
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : flight engineer pilot : private
Experience	flight time last 90 days : 268 flight time total : 14900 flight time type : 11000
ASRS Report	294173
Events
Anomaly	conflict : ground critical non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Prior to takeoff, there was some confusion as to the allowable takeoff weight. At the gate in sna, while preparing for departure, in addition to briefing the nonstandard procedures for departure, a discussion of weight and balance ensued focusing on the '0' fuel weight. During subsequent short taxi, it is possible that the '0' fuel weight was used in the takeoff chart to figure the takeoff V speeds.

Original NASA ASRS Text

Title: IMPROPER TKOF DATA COMPUTATION.

Narrative: PRIOR TO TKOF, THERE WAS SOME CONFUSION AS TO THE ALLOWABLE TKOF WT. AT THE GATE IN SNA, WHILE PREPARING FOR DEP, IN ADDITION TO BRIEFING THE NONSTANDARD PROCS FOR DEP, A DISCUSSION OF WT AND BAL ENSUED FOCUSING ON THE '0' FUEL WT. DURING SUBSEQUENT SHORT TAXI, IT IS POSSIBLE THAT THE '0' FUEL WT WAS USED IN THE TKOF CHART TO FIGURE THE TKOF V SPDS.

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.