12-33-02
 ALL  ú ú 01A Page 314 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 WARNING: BOEING DOES NOT RECOMMEND TOWING THE AIRPLANE WHEN
_______ ELECTRICAL POWER IS NOT AVAILABLE TO OPERATE THE BRAKE HYDRAULIC SYSTEM. IF TOWING WITHOUT POWER IS REQUIRED, TELL THE TOW VEHICLE DRIVER. TOW SPEEDS MUST BE DECREASED TO WALKING SPEED (OR A SPEED WHICH WILL ALLOW THE TOW VEHICLE TO STOP THE AIRPLANE IN A SHORT DISTANCE) OR YOU MUST NOT TOW THE AIRPLANE. WITHOUT ELECTRICAL POWER, THERE IS ONLY ACCUMULATOR PRESSURE AVAILABLE TO OPERATE THE BRAKES THREE (3) TIMES. IF YOU DO NOT OBEY THIS WARNING, IT CAN CAUSE INJURY TO PERSONS OR DAMAGE TO THE AIRPLANE.
 (a)  Tow the airplane (AMM 09-11-00/201).
 NOTE: With a minimum of 2800 psi, you can apply the brakes no
____ more than three (3) times before the accumulator is depleted below the precharge (red band) level where no brakes will be available.
 S 553-039
 (13) Prepare the airplane for storage:
 (a)  
Close the outflow valve.

 (b)  
Open the battery bus circuit breaker.

 (c)  
Remove the main batteries and APU batteries and put them in a warm location where the temperature remains above 50°F (10°C) (AMM 24-31-01/401 and 24-31-06/401).

 (d)  
Close all the main cabin doors, galley service doors, cargo compartment doors, access doors, and flight compartment windows.

 NOTE: This will prevent snow from getting into the airplane
____
 interior.

 TASK 12-33-02-603-040
 4.  Return the Airplane to Service After overnight or Extended Parking at_____________________________________________________________________ Temperatures Below 5°F (-15°C)______________________________
 A.  General
 (1)  
If the temperature has remained above -40°F (-40°C), passenger cabin warming is not necessary.

 (a)  For temperatures below -4°F (-20°C), make sure the flight deck is warmed and maintained at -4°F (-20°C) for 30 minutes.

 (2)  
If the temperature has been below -40°F (-40°C) within the last 12 hours, then you must warm the airplane.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-33-02
 ALL  ú ú 01A Page 315 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 B. References
 (1)  
AMM 10-11-01/201, Normal Parking

 (2)  
AMM 10-11-02/201, Prolonged Parking

 (3)  
AMM 12-11-01/301, Fuel Tank Pressure Fueling

 (4)  
AMM 12-13-07/301, IDG Oil Fill

 (5)  
AMM 12-15-03/301, Wing Gear Shock Strut

 (6)  
AMM 12-15-04/301, Body Gear Shock Strut

 (7)  
AMM 12-15-05/301, Nose Gear Shock Strut

 (8)  
AMM 12-15-06/301, Landing Gear Tire Servicing

 (9)  
AMM 12-15-08/301, Oxygen

 (10)
 AMM 12-33-01/301, Cold Weather Maintenance

 (11)
 AMM 20-41-01/201, Static Grounding

 (12)
 AMM 22-10-00/501, Autopilot (Flight Controls)

 (13)
 AMM 24-22-00/201, Supply Electrical Power

 (14)
 AMM 24-30-00/501, Main and APU Battery Charge - System Check

 (15)
 AMM 24-31-01/401, Main Battery

 (16)
 AMM 24-31-06/401, APU Battery

 (17)
 AMM 25-63-02/201, Megaphone Operational Test

 (18)
 AMM 29-11-00/201, Main Hydraulic Systems

 (19)
 AMM 32-35-00/501, Nose and body Landing Gear Alternate Extension

 (20)
 AMM 32-36-00/501, Wing Landing Gear Alternate Extension

 (21)
 AMM 32-41-00/201, Hydraulic Brake System

 (22)
 AMM 32-42-02/201, Antiskid Module

 (23)
 AMM 32-41-15/401, Main Landing Gear Brake Removal/Installation

 (24)
 AMM 33-51-00/501, Emergency Lights - Functional Test
　
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