Captain's report on erroneous takeoff data computed by his first officer.

Attributes
ACN	296361
Time
Date	199502
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bpk
State Reference	AR
Altitude	agl bound lower : 0 agl bound upper : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 240 flight time total : 4300 flight time type : 2000
ASRS Report	296361
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	non adherence : far 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:

It was brought to my attention that my first officer had been using the wrong performance data to figure our maximum takeoff weight, for quite some time. I checked, and he had for at least a couple weeks. However, at no time did we exceed our maximum takeoff weight using the correct performance chart. It has been brought to his attention, and the problem is corrected. This only happened at 1 airport, but did occur several times. I think what caused the problem is that some of our planes are certified under 1 part of the far's, and some of the newer one's are certified under part 23 (I think) which is more restrictive. At any rate, no limitations were exceeded, and the problem has been corrected.

Original NASA ASRS Text

Title: CAPT'S RPT ON ERRONEOUS TKOF DATA COMPUTED BY HIS FO.

Narrative: IT WAS BROUGHT TO MY ATTN THAT MY FO HAD BEEN USING THE WRONG PERFORMANCE DATA TO FIGURE OUR MAX TKOF WT, FOR QUITE SOME TIME. I CHKED, AND HE HAD FOR AT LEAST A COUPLE WKS. HOWEVER, AT NO TIME DID WE EXCEED OUR MAX TKOF WT USING THE CORRECT PERFORMANCE CHART. IT HAS BEEN BROUGHT TO HIS ATTN, AND THE PROB IS CORRECTED. THIS ONLY HAPPENED AT 1 ARPT, BUT DID OCCUR SEVERAL TIMES. I THINK WHAT CAUSED THE PROB IS THAT SOME OF OUR PLANES ARE CERTIFIED UNDER 1 PART OF THE FAR'S, AND SOME OF THE NEWER ONE'S ARE CERTIFIED UNDER PART 23 (I THINK) WHICH IS MORE RESTRICTIVE. AT ANY RATE, NO LIMITATIONS WERE EXCEEDED, AND THE PROB HAS BEEN CORRECTED.

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.