18. (Refer to Figures 32 and 33.) What effect does a 35-gallon fuel burn (main tanks) have on the weight and balance if the airplane weighed 2,890 pounds and the MOM/100 was 2,452 at takeoff?

210 pounds less and the aircraft is aft of the limits. First calculate the burn of fuel- 35 gallons at 6 pounds per gallon = 210 pounds less. Now look at figure 32 under the fuel numbers: find 35 gallons which is 210 pounds which will change the CG by 158 according to the chart. Subtract the weight from the original weight 2890 — 210 = 2680. Then subtract the moment of 158 from the original moment of 2452 equals 2294. Now on figure 34 find the new weight of 2680. Look at the two moment numbers for that weight. The first number is the forward GC the second is aft CG. The aft CG for this weight is 2287, our number is now 2294, which mean we are now aft of the acceptable aft CG.