Possible inaccurate aircraft weight and balance calculation due to the procedure used.

Attributes
ACN	298752
Time
Date	199503
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sbn
State Reference	IN
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
Navigation In Use	Other Other
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 32 flight time total : 2600 flight time type : 32
ASRS Report	298752
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

In completing the load manifest for (air carrier X) flight (#) it requires a process of using a graph with slanted lines and drawing vertical and horizontal lines for each zone. When doing this the vertical and horizontal lines can vary slightly slanted, which will effect where the cg outcome lies. When doing the load manifest for flight (#) the lines may have not been exactly vertical therefore the cg may have been affected by this. I believe this could be prevented if a straight edge was required to be used in completing the load manifest.

Original NASA ASRS Text

Title: POSSIBLE INACCURATE ACFT WT AND BAL CALCULATION DUE TO THE PROC USED.

Narrative: IN COMPLETING THE LOAD MANIFEST FOR (ACR X) FLT (#) IT REQUIRES A PROCESS OF USING A GRAPH WITH SLANTED LINES AND DRAWING VERT AND HORIZ LINES FOR EACH ZONE. WHEN DOING THIS THE VERT AND HORIZ LINES CAN VARY SLIGHTLY SLANTED, WHICH WILL EFFECT WHERE THE CG OUTCOME LIES. WHEN DOING THE LOAD MANIFEST FOR FLT (#) THE LINES MAY HAVE NOT BEEN EXACTLY VERT THEREFORE THE CG MAY HAVE BEEN AFFECTED BY THIS. I BELIEVE THIS COULD BE PREVENTED IF A STRAIGHT EDGE WAS REQUIRED TO BE USED IN COMPLETING THE LOAD MANIFEST.

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.