TWINCOMANCHECiR
C.
BRITTAIN INDUSTRIES INC. MODEL l-T-5 TIP TANKS INSTALLATION
The information in this document is FAA approved material which. together with the
appropriate basic CAA-FAA approved Airplane Flight Manual is applicable and must be carried in the
airplane when modified by the installation of Brittain Industries, Inc.: Model TT-5 Tip Tanks in
accordance with S.T.C. SA727WE dated June 25, 1964, revised January 23, 1970.
The information in this document supersedes the basic Airplane Flight Manual only where
covered in the items contained in this supplement. For limitations and procedures not contained in
this supplement, consult the manual proper.
1. LIMITATIONS
Same as prescribed in appropriate FAA approved Airplane Flight Manual except:
a. Auxiliary wing tip tank fuel to be used in level flight only.
b.
When using auxiliary fuel, use wing tip tank fuel first.
C.
Maximum allowable gross weight 3725 Ibs. Any weight in excess of 3600 lbs. must
consist of symmetrically loaded fuel in the tip tanks.
d. Never exceed airspeed limit of 230 MPH (red line).
C.G. Range with symmetrical fuel
quantity in each tip tank:
87.62” to 9 1.38” at 3725 lbs.
z
9
C.G. Range with 0.3 gals. in each tip
tank :
86.72” to 9 1.87” at 36;5 Ibs.
C.G. Range with tip tanks empty:
86.5” to 92” at 3600 lbs.
C.G. of wing tip tank fuel is 90.5”.
Straight line variation between points
given.
‘.
2.
OPERATING PROCEDURES - NORMAL ‘.
Same as prescribed in appropriate FAA approved Airplane Flight Manual except:
a. Select tip tank fuel by positioning Fuel Selector Valve in “AUX” position and
TIP/AUX
Fuel Selector Switch in “TIP” position.
b.
Select auxiliary tank fuel by positioning Fuel Selector Valve in “AUX” position and
TIP/AUX Fuel Selector Switch in “AUX” position.
i.
Aircraft fuel’gauges register fuel quantity of tank selected.
TIP/AUX Fuel Selector Switch to be in “AUX” position when using main tank fuel.
If the Tip Tanks have been run completely dry in flight, air may be trapped in the line
fromeTip Tank to solenoid valve when Tip Tanks are subsequently filled. The air pocket in the
line may prevent immediate feeding of fuel from Tip Tanks. To avoid this condition, purge air
from lines prior to starting aircraft.
(1) Turn fuel selector valve to “AUX” position.
80
85 so 95
C. G. LOCATION
(INCHES AFT OF DATUM 1
FAA APPROVED November 28,1969
REPORT: 1605 PART I PAGE 25
REISSUED: June 1,197O
MODEL: PA-39
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