resulting from structural and equipment changes in service. When airframe changes and bulletins that affect the basic weight of the aircraft are incorporated, the weight and balance data shown in these changes and bulletins should be entered on Chart C to bring the basic weight and moment up to date. At all times the last weight, moment/constant, and index entry is considered to be the current weight and balance status of the aircraft. At the time of delivery of a new aircraft, the manufacturer entered on this chart the basic weight, moment/constant, and index of the aircraft.
NOTE: The terms basic index, index of the aircraft, and balance computer index are all synonymous terms relating to the use of the load adjuster and should not be confused with index units as applied to simplified moments.
Chart E - Load Data Each manual of weight and balance data and each weight and balance folder contain a Chart E with loading graphs and tables applicable to the particular aircraft for which the manual or folder is prepared. In later manual editions, loading graphs are replaced by similar information given in tabular form. Both graphs and tables are largely self-explanatory and give identical information. Each Chart E usually consists of several pages. Chart E data consists of the following:
Complete aircraft fuselage diagram
Location of leveling points and devices
Location of jig point
Location of reference datum (RD) and the distances from the RD to the leading edge of the MAC and to the centerlines of the wheels
Length of MAC
CG range, given in inches and also in percent of MAC
Crew change tables
Bomb and ammunition data
Compartment centroids and capacities
Landing gear moment change retraction
CG table (CG loading limits)
The purpose of Chart E is to limiting due to provide information necessary to work out weight and balance problems so that proper information may be entered on Form F. Charts E and the load adjusters perform identical functions. Computations performed with the aid of load adjusters are faster, but those derived from Chart E are more accurate.
As indicated from its title, this form (fig. 6-23) is used for recording weighing data and computing the weight of the aircraft. The figure illustrates the entries on this form.
Form F is the summary of the actual disposition of the load in the aircraft, It records the balance status of the aircraft step by step. It serves as a worksheet on which the weight and balance supervisor records the calculations and any corrections that must be made to ensure that the aircraft will be within weight and CG limits. Form F should be completed prior to flight whenever an aircraft is loaded in a manner for which no previous valid Form F is available. There are two versions of the Form F - transport (fig. 6-24) and tactical (fig. 6-25). These versions were designed to provide for the respective loading arrangements of the two types of aircraft missions. The general use of both versions is the same. The transport form is on one side of the sheet, and the tactical form is on the other.
Obviously, there are many maintenance functions that affect the weight and balance of aircraft. These functions include, but are not limited to, removal or installation of ordnance material, periodic jacking and weighing, various fuel and lubricant loadings, and incorporation of changes by any of the production divisions. Recording and reporting these functions in the weight and balance records are responsibilities of the AZ under the supervision of the weight andContinue Reading