(4)
Apply the SPECIAL MATERIALS (Material No. 05-002) to the screws (2) and the washers (1).
Subtask 33-41-16-420-050
B. Installation of the Tail Navigation-Light Transformer 13LA
(1)
Install the transformer plate (4) with the transformer in the APU exhaust access fairing.
(2)
Install the screws (2) and the washers (1).
(3)
Seal the screws (2) and the washers (1) with the SEALANTS (Material No. 09-023).
(4)
Remove the blanking caps from the electrical connectors.
R (5) Connect the electrical connector (3).
Subtask 33-41-16-410-050
C. Install the APU exhaust access fairing 317AL (Ref. TASK 52-41-18-400-001).
Subtask 33-41-16-865-052
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1LA, 2LA, 10LV, 1KD, 2KD.
Subtask 33-41-16-710-050
R E. Do the operational test ot the tail navigation lights (Ref. TASK 33-41-R 00-710-001) and (Ref. TASK 33-48-00-710-002).
5. Close-up
________
Subtask 33-41-16-942-050
A. Remove the access platform(s).
LANDING LIGHTS - DESCRIPTION AND OPERATION
__________________________________________
1. General
_______ R Two retractable landing lights are installed on the bottom of the wings at R Zone 571 and 671. The lights operate through maximum operating speeds (VMo).
2. Component Location
__________________
(Ref. Fig. 001)
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF.
-------------------------------------------------------------------------------7LB LT-LANDING, L 571 571 33-42-11 8LB LT-LANDING, R 671 671 33-42-11
3. System Description
__________________
(Ref. Fig. 001) R The left-hand (LH) landing light 7LB and the right-hand (RH) landing light R 8LB are installed on the bottom of the LH and RH wings. Each landing light R has an independent extension/retraction and illumination circuit. Two toggle R switches, LAND L 5LB and LAND R 6LB, control the landing light system. These R switches are installed on the overhead panel 25VU in the cockpit. When the R landing lights are extended, an indication 'LAND LT' is shown on the cathode R ray tube (CRT) as a memo message. The CRT is a part of the Electronic R Centralized Aircraft Monitoring system (ECAM) (Ref. 31-52-00).
4. Power Supply
____________
(Ref. Fig. 002) R The 115V AC busbars, 101XP and 202XP, supply power to the LH and RH landing R lights through the circuit breakers 1LB, 2LB, 3LB and 4LB. These circuit R breakers are installed on panel 122VU in the cockpit. The circuit breakers R 1LB and 2LB control the power supply to the LH and RH landing light R step-down transformers. The circuit breakers 3LB and 4LB control the power R supply to the LH and RH single-phase motors of the landing lights.
5. Interface
_________
Not Applicable
R Landing Lights - Component Location Figure 001
1EFF : 1 1 1CES ALL 1 111 33-42-00 Page 2 Aug 01/04
R Landing Lights - Schematic Figure 002
1EFF : 1 1 1CES ALL 1 111 33-42-00 Page 3 May 01/05
6. Component Description_____________________ (Ref. Fig. 002)
R A. Landing Light Assembly 7LB(8LB)
R R Each landing light assembly has: - a single-phase motor which has an electromagnetic brake. This is connected to a gearbox which moves a screw-jack that extends and retracts the lamp housing - a lamp housing which has installed a 28V AC, 600 WATT, quartz, sealed-beam unit - a step-down transformer, which is attached to the gearbox housing - two sealed limit microswitches - a power relay - a full-wave rectifier.
R B. Two toggle switches 5LB and 6LB
R R The toggle switches LAND L 5LB and LAND R 6LB have three switch positions, which are labelled ON, OFF and RETRACT.
7. Operation/Control and Indicating________________________________ (Ref. Fig. 001)
R R R R A. Two control switches 5LB and 6LB are installed on the overhead panel 25VU. The switch LAND L controls the left-hand landing light and the switch LAND R controls the right-hand landing light. These switches are operated from RETRACT to OFF to ON for extension and illumination of the landing lights. Then from ON to OFF to RETRACT, to set the landing lights to off and to retract them. These operations are as follows:
- RETRACT to OFF Power is supplied to the extend coil of the related motor, through a microswitch, to extend the related landing light.
R R - OFF to ON Power is supplied to the related power relay, through the full-wave rectifier and the closed contacts of a microswitch. This connects 115V AC, 400Hz, to the step-down transformer which decreases the voltage to 28V AC. The related landing light comes on.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：A320飞机维护手册 AMM LIGHTS 灯光2(3)
