-at least one engine in operation,
-shock absorbers of the main landing gears extended.
The test starts 6 seconds after the nose gear is downlocked and stops
upon touchdown of the main gears.
In this test, an electrical signal is temporarily sent to the servovalve,
thus causing a slight motion of the nose wheel assembly (less than 2,5
degrees).
The monitoring channel checks that the order has been correctly executed.
D. The operation of the BSCU is described in 32-42-00.
E. On the nose gear leg, when the towing control lever is in the towing position, the MEMO section of the upper ECAM DU shows "NW STRG DISC" in green. This message is amber if one engine is running.
F. Operating Principle
(Ref. Fig. 019)
The control channel acts on the servovalve as a function of the difference in position between the handwheel (in the cockpit) and the wheels. The monitoring channel delivers in a similar manner a signal which represents the position of the slide valve in the servovalve. If both channels disagree about the position of the slide valve in the servovalve, the steering system is depressurized.
1EFF : 401-499, 1 32-51-00Page 32 1 1 Config-2 Aug 01/05 1 1 1CES 1
Nose Wheel Steering Control - Principle
Figure 019
1EFF : 401-499, 1 32-51-00Page 33 1 1 Config-2 Aug 01/05 1 1 1CES 1 The principle is the same when the control is either made through the pedals or in automatic mode.
G. Aircraft Turning Radii (Ref. Fig. 020)
1EFF : 401-499, 1 32-51-00Page 34 1 1 Config-2 Aug 01/05 1 1 1CES 1
Aircraft Towing Radii - A 318
Figure 020
1EFF : 401-499, 1 32-51-00Page 35 1 1 Config-2 Aug 01/05 1 1 1CES 1 STEERING - ADJUSTMENT/TEST
__________________________
TASK 32-51-00-710-001
Operational Test of the Nose Wheel Steering with the CFDS.
WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
_______
YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 31-32-00-860-009 Procedure to Get Access to the SYSTEM REPORT/TEST/L/G Page R 34-10-00-860-004 IR Alignment Procedure
3. Job Set-up
__________
Subtask 32-51-00-860-050
A. Aircraft Maintenance Configuration
(1)
Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
(2)
On the MCDU, get the SYSTEM REPORT/TEST L/G page (Ref. TASK 31-32-00-860-009).
R (3) Do the IR alignment procedure (Ref. TASK 34-10-00-860-004).
1EFF : ALL 1 32-51-00Page 501 1 1 Aug 01/05 1 1 1CES 1 Subtask 32-51-00-865-050
B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY 4GG M36 121VU HYDRAULIC/BRAKING AND STEERING/SYS2/CTL 3GG M35 121VU HYDRAULIC/BRAKING AND STEERING/SYS1/CTL 1GG M34 121VU HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY 2GG M33
4. Procedure
_________
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 301-399,
Subtask 32-51-00-710-050
A. Operational Test of the Nose Wheel Steering with the CFDS
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1.
On the MCDU, push the line key - the BSCU SYS 1 page comes into view. adjacent to the BSCU 1 indication.
2. 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 LANDING GEAR 起落架8(75)
