(2)
WDM 33-35-11 thru WDM 33-35-99
2. Ceiling Lights
______________
A. The floodlight modules are attached to the compartment ceiling along the centerline of the cargo area. Module housings are attached to the ceiling with screws.
(1)
The ceiling light adjacent to the crew ladder opening is also an access light for the upper deck.
(2)
The forward ceiling lights are also the threshold lights for the nose door.
3. Sidewall Lights
_______________
A. The floodlight modules are attached to the walls on both sides of the cargo compartment.
(1)
Each light is installed above a reveal in the upper sidewall.
(2)
The forward sidewall adjacent to the crew ladder is also an access light for the upper deck.
4. Side Cargo Door Lights
______________________
A. The cargo door has lights installed across the top part of the door.
(1) The incandescent lights are the same modules used for the ceiling lights. Each module is installed in a door panel recess. The incandescent lights are used to light the cargo door ramp area when the door position is open.
(a) The incandescent lights are also referred to as ramp lights.
5. Nose Cargo Door Lights
______________________
A. The nose cargo door has lights installed across the top part of the door.
(1) The incandescent lights are the same modules used for the ceiling lights. Each module is installed in a door panel recess. The incandescent lights are used to light the nose cargo door ramp area when the door position is open.
(a) The incandescent lights are also referred to as ramp lights.
6. Operation
_________
A. There is 115 volts ac of electrical power supplied to transformers. The transformers supply 28 volts ac to operate the incandescent lights.
B. The sidewall and ceiling lights are controlled with switches on the attendant's panel and the panel adjacent to each cargo door. Lights on the cargo doors are controlled by switches in the doors.
(1) Lights in the nose area are controlled with switches on the panel adjacent to the nose cargo door.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
33-35-00
ALL ú ú 05 Page 1 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE A CEILING LIGHTS
SIDE CARGO DOOR
SEE A RAMP LIGHTS
LIGHT SWITCHES SEE A LIGHTS SIDEWALL
LIGHT
ASSEMBLY
QUICK-RELEASE
SCREW
SCREW
(2 LOCATIONS)
(4 LOCATIONS)
LENS ASSEMBLY
LIGHT MODULE ASSEMBLY (EXAMPLE)
A
Main Deck Cargo Handling Lights - Component Location Figure 1
E47469
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
33-35-00
ALL ú ú 04 Page 2 ú Oct 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
MAIN DECK CARGO HANDLING LIGHTS - MAINTENANCE PRACTICES
_______________________________________________________
1. General_______
A. This procedure has these tasks:
(1) Main Deck Cargo Light - Lamp Replacement
B. Main Deck Cargo lights includes ceiling lights, sidewall lights, and ramp lights.
TASK 33-35-00-902-001
2. Main Deck Cargo Lights - Lamp Replacement (Fig. 201)_________________________________________
A. Consumable Materials
(1) G01043 Cloth - non abrasive, lint free.
B. References
(1)
AMM 24-22-00/201, Manual Control
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