(12)
 AMM 25-63-02/201, Megaphone Battery ReplacementConsumable Materials

 (1)  
D00109 Oil - Aircraft turbine engine, synthetic base - MIL-L-7808

 (2)  
Location Zones 100 Lower Half of Fuselage 200 Upper Half of Fuselage 300 Empennage 400 Powerplant and Nacelle Struts 500 Left Wing 600 Right Wing 700 Landing Gear and Landing Gear Doors 800 Doors

Procedure
 S 423-026
 (1)  Install the inlet and exhaust covers.
 NOTE: Keep the engine covers in a warm location before you install
____ them on the airplane. Covers that are cold or frozen may be difficult to install, and may freeze to the engine inlet and exhaust.
 At very low ambient air temperatures, the time for the engine to cool to -27.4°F (-33°C) can be greatly increased by the use of engine inlet and exhaust covers.
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 (2)  S 553-027Do the Cold Weather Maintenance procedure (AMM 12-33-01/301).
 (3)  S 503-028Do the Park the Airplane (Normal Parking) procedure (AMM 10-11-01/201).
 (4)  S 503-029If the airplane will be parked for longer than 7 days, prepare the airplane for storage for more than seven days (AMM 10-11-02/201).
 NOTE:____ Prepare to park the airplane for extended periods.
 (5)  S 603-030Fill the IDG with oil as requried (AMM 12-13-07/301).
 NOTE:____ If the IDG is serviced for cold weather operation, use the preferred oil, MIL-L-7808 instead of MIL-L-23699 lubricant. The only MIL-L-7808 lubricant approved for Sundstrand IDGs is Exxon 2389.
 (6)  S 213-031Visually check the wing lower surface for fuel leaks.
 (7)  S 213-032Visually check the landing gear. (a) Wipe the inner cylinder with a clean cloth to check for hydraulic leakage from the seals.
 (8)  S 683-034Drain the potable water system (AMM 12-14-01/301).
 NOTE:____ The potable water system must be fully drained.

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747-400
MAINTENANCE MANUAL

 S 683-035
 (9)  Make sure all galley inserts, coffee pots, water heaters, filters, and boilers are empty and supply lines are drained using the manufacturer's instructions.
 S 683-036
 WARNING: THE GLYCOL (ANTIFREEZE) MUST NOT CONTAIN ANY FORM OF "STOP
_______ LEAK" CHEMICAL AS THIS CAN CAUSE DAMAGE TO THE SYSTEM COMPONENTS.
 (10) If you do not drain the waste system, add glycol.
 NOTE: Use the fluid manufacturer's recommendations for mixture
____
 ratios (AMM 12-17-01/301).

 (a)  If the glycol-water mixture does not provide adequate protection, do the step that follows: 1) Fully drain the waste system (AMM 12-17-01/301).
 S 623-037
 (11) Do the preservation for the electrical/electronic systems.
 NOTE: Do not remove the batteries from the emergency radio beacons
____
 in the slide/raft covers and life rafts.

 (a)  
Remove the megaphone battery, do this task: Megaphone Battery Replacement (AMM 25-63-02/201).

 (b)  
Remove the emergency light batteries (AMM 33-51-04/201).

 (c)  
Apply electrical power to all of the electrical/electronic equipment remaining inthe airplane for a minimum of 2 hours (AMM 24-22-00/201). 1) Look at the EICAS to make sure the main battery and the AP

 battery are fully charged (AMM 24-31-06/401).

 (d)  
Disconnect the APU battery (AMM 24-31-06/401).

 NOTE: You can connect the battery for APU operations.
____
 (e)  
Disconnect the main battery (AMM 24-31-01/401).

 (f)  
Put all batteries in a warm location where the temperature remains above 50°F (10°C).

 S 023-038
 (12) If you need to tow the airplane, install the main battery and APU battery (AMM 24-31-01/401 and AMM 24-31-06/401).
　
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