Takeoff over gross account temperature.

Attributes
ACN	92735
Time
Date	198808
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw
State Reference	TX
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	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 180 flight time total : 6000 flight time type : 600
ASRS Report	92735
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Our company issued performance data for takeoff did not account for a temperature increase or a weight increase. We requested new departure data via ACARS. Our new data showed that at the current temperature, 102 degrees F, and at our current weight, 379900#, we were legal for a maximum power takeoff provided the air conditioning packs and pneumatic sources were all turned off. The company issued instructions state that if temperature and weight are correct, then the data may be used. We followed these instructions and took off. Later we discovered that another section of the departure data, down near the bottom, stated that the aircraft was 2800# overweight due to temperature. Our written instruction sheet did not direct us to check this, nor did the computer print out that we were overweight. Since this data is not easily seen, nor called for, the computer should be programmed to catch this and inform us of our overweight condition. I plan to check into this.

Original NASA ASRS Text

Title: TKOF OVER GROSS ACCOUNT TEMPERATURE.

Narrative: OUR COMPANY ISSUED PERFORMANCE DATA FOR TKOF DID NOT ACCOUNT FOR A TEMP INCREASE OR A WT INCREASE. WE REQUESTED NEW DEP DATA VIA ACARS. OUR NEW DATA SHOWED THAT AT THE CURRENT TEMP, 102 DEGS F, AND AT OUR CURRENT WT, 379900#, WE WERE LEGAL FOR A MAX PWR TKOF PROVIDED THE AIR CONDITIONING PACKS AND PNEUMATIC SOURCES WERE ALL TURNED OFF. THE COMPANY ISSUED INSTRUCTIONS STATE THAT IF TEMP AND WT ARE CORRECT, THEN THE DATA MAY BE USED. WE FOLLOWED THESE INSTRUCTIONS AND TOOK OFF. LATER WE DISCOVERED THAT ANOTHER SECTION OF THE DEP DATA, DOWN NEAR THE BOTTOM, STATED THAT THE ACFT WAS 2800# OVERWEIGHT DUE TO TEMP. OUR WRITTEN INSTRUCTION SHEET DID NOT DIRECT US TO CHK THIS, NOR DID THE COMPUTER PRINT OUT THAT WE WERE OVERWT. SINCE THIS DATA IS NOT EASILY SEEN, NOR CALLED FOR, THE COMPUTER SHOULD BE PROGRAMMED TO CATCH THIS AND INFORM US OF OUR OVERWT CONDITION. I PLAN TO CHK INTO THIS.

Data retrieved from NASA's ASRS site as of August 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.