(c)
Remove the fuel from the opened fuel tank (AMM 28-11-00/201).
(d)
Examine the fuel tank and the fuel lines for corrosion (AMM 28-11-00/701).
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MAINTENANCE MANUAL
(e)
If corrosion was found in the tank, drain all of the other tanks (AMM 28-26-00/201). 1) Open all of the tanks (AMM 28-11-00/201). 2) Remove the fuel from all of the tanks (AMM 28-00-00/201). 3) Examine the tank and the fuel lines for corrosion.
(f)
If the fuel tank and the fuel lines contain corrosion, refer to MRB instructions to make repairs.
(g)
Open the dry bay areas.
(h)
Examine the dry bay area for corrosion.
1) If corrosion is found, refer to MRB instructions to make repairs.
(i)
Close the dry bay areas that were opened.
(j)
Close the fuel tanks (AMM 28-11-00/201).
WARNING:_______ BIOBAR JF IS POISONOUS. DO NOT BREATH VAPOR OR TOUCH WITH
SKIN.
CAUTION:_______ DO NOT ADD CONCENTRATED BIOCIDE TO THE FUEL TANKS. IF YOU
ADD CONCENTRATED BIOCIDE SALT DEPOSITS CAN FORM AN CAN
CAUSE DAMAGE. IF METERED INJECTION EQUIPMENT IS NOT
AVAILABLE, REFER TO CPM 20-62-00, CORROSION PREVENTION
MANUAL, PART I, FOR OTHER APPROVED PROCEDURES TO ADD
BIOCIDE TO THE FUEL TANKS.
(k) Fill and keep all of the fuel tanks at approximately 10 percent capacity (AMM 12-11-01/301). The fuel tanks in the horizontal stabilizer must stay empty. The fuel must contain 135 to 270 parts per million maximum by weight Biobor JF or 0.05 percent to 0.15 percent by volume PFA55MB (MIL-I-27686) additive to prevent micro-organisms in the fuel tanks. The preferred procedure to mix additive is by metered injection into flowing stream of fuel. Do a check of the additive ratio each year by chemical test.
NOTE: If JP-4 or JP-5 fuel formulated per MIL-T-5624H is used
____ to treat the tanks, additional additives are not necessary. JP-4 and JP-5 fuel, per MIL-T-5624H, already contains 0.1 to 0.15 percent by volume of PFA55MB.
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747-400 MAINTENANCE MANUAL
S 582-242
(2) Keep the landing gear serviceable.
(a)
Inflate the shock struts with dry nitrogen to a minimum of 100 psi when you park the airplane for more than 7 days.
(b)
If the airplane is towed or moved, inflate the shock struts with dry nitrogen (AMM 12-15-03/301, AMM 12-15-04/301, AMM 12-15-05/301).
NOTE: The shock struts are filled with MIL-H-6083 type fluid
____ and it is not neccessary to drain or fill the shock struts.
(c) Extend the inner cylinder of the shock strut approximately half way.
CAUTION: BE CAREFUL NOT TO APPLY THE GREASE TO OTHER SURFACES.
_______
(d) Butter lubricate the chrome area with MIL-G-25013 grease.
NOTE: On systems that use BMS 3-11 hydraulic fluid, a
____ compatible grease MCS 352 may be used as an alternate to MIL-G-25013. Do not use MCS 352 grease on systems that use MIL type greases as MIL 352 grease can cause damage to the seals.
(e) Remove the MIL-G-25013 or MCS 352 grease before you deflate the shock strut or move the airplane.
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