(b)
Move the stabilizer, rudder, and aileron trim through one full movement of travel.
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747-400 MAINTENANCE MANUAL
(c)
Put the surfaces within 1/2 degree of the previous position, but not the same position.
(d)
Move the elevator, the rudder, and the aileron through three full movements of travel.
(e)
Move the rudder ratio changer actuators through three full movements of travel and put it back in its initial condition.
(f)
Lubricate all of the flight controls with MIL-G-23827 grease (AMM 12-21-16/301 thru AMM 12-21-23/301).
(g)
Lubricate the control cables which are out of the fuselage pressurized area (AMM 12-21-05/301).
S 582-235
(2) Keep the hydraulic systems serviceable.
CAUTION: DO NOT USE MCS 352 ON COMPONENTS THAT CONTAIN MIL-H-5606
_______ OR MIL-H-6083. MCS 352 CONTAINS SKYDROL AND CAN CAUSE DAMAGE TO THE SEALS USED IN MIL OIL SYSTEMS.
(a)
Clean all of the finished surfaces on actuator rods and valve slides which are open to the outside air and apply a layer of with MCS 352.
(b)
Make sure the ground lock pins are installed on all gears to prevent operation.
(c)
Move the main and nose landing gear doors through one full movement of travel.
S 582-236
(3) Keep the landing gear serviceable.
(a)
Apply protective coating MIL-C-16173, grade 2 on all of the unpainted landing gear parts which are open to the outside air.
(b)
Apply protective coating if it is necessary after you wash the airplane.
S 582-237
(4) Keep the water and waste serviceable.
(a) Disinfect the potable water system (AMM 38-10-00/201).
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G. 180 Day Maintainence
S 582-238
(1) Keep the fire protection serviceable.
(a)
Make sure all the fire extinguishers (Engine, APU, Portable) have been weighed within the 60 day period and are in the weight limits shown on the fire extinguisher nameplate.
(b)
Reference: 1) AMM 26-26-01/601, Halon fire extinguisher. 2) AMM 26-26-02/601, Water-type fire extinguisher. 3) AMM 26-27-00/601, BCF fire extinguisher. 4) Replace the passenger and crew portable fire extinguishers
if the weight is below the full weight shown on the nameplate.
S 582-239
(2) Keep the hydraulic systems serviceable.
(a)
Service the hydraulic reservoirs and accumulators before you operate each engine (AMM 12-15-09/301).
(b)
If the engines are removed form the airplane, depressurize the hydraulic reservoirs and accumulators and pressurize to 40 psi with dry nitrogen (AMM 12-15-09/301).
S 582-240
(3) Keep the landing gear serviceable.
(a) Lubricate all of the lubrication points on the landing gear (AMM 12-21-01/301).
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