THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
Effective: 01/01/08
7-29
FLIGHT CONTROL STATIC BALANCE LIMITS
After repaint or repair of balanced control surfaces, they must be checked for proper
balance using the limits found in Table 7-2, below. Stripping of paint and repainting may
be necessary if control fails to be within limits.
Failure to stay within control surfaces static
balance limits could lead to control surface
flutter, which could lead to loss of aircraft,
life, and/or property.
TABLE 7-2: Static Balance Limits
“LOW SPEED” RUDDER ASSY P/N 40226-100: POUND-INCHS OF IMBALANCE
FROM HINGE LINE, TRAILING EDGE HEAVY.
Note: Arm depends on where scale is placed. Be sure to measure.
INCH POUNDS
CONDITION MINIMUM
MAXIMUM
MANUFACTURING
45 100
FIELD REPAIR
45
110
For example, 29” x 3.45# = 100 #” (55.2 oz/16 = 3.45#)
“LOW SPEED” ELEVATOR ASSY P/N 40058-505 “L/H” or -506 “R/H”: POUND-INCHS
OF IMBALANCE FROM HINGE LINE, TRAILING EDGE HEAVY.
POUND - INCHES
CONDITION MINIMUM
MAXIMUM
MANUFACTURING
40 53
FIELD REPAIR
40
57
For example, 16” x 3.31# = 53 #” (53 oz/16 = 3.31#)
“LOW SPEED” AILERON ASSY P/N 52081-61 (left and right interchangeable):
POUND-INCHS OF IMBALANCE FROM HINGE LINE, TRAILING EDGE HEAVY
POUND - INCHES
CONDITION MINIMUM
MAXIMUM
MANUFACTURING none
41.4
FIELD REPAIR
none
45.0
For example, 21.1” x 1.96# = 41.4 #” (31.4 oz/16 = 1.96#)
WARNING!
