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- “WHEEL N.W STEER FAULT” for aircraft with FWC software pre E3P

If the L/G SHOCK ABSORBER FAULT ECAM caution is triggered at
any time in flight, and the WHEEL N/W STRG FAULT ECAM caution
is triggered after the landing gear extension:
• When all landing gear doors are indicated closed on ECAM
WHEEL page, reset the BSCU:
- A/SKID&N/W STRG---------------------------OFF THEN ON
• If the WHEEL N/W STRG FAULT ECAM caution is no longer
displayed, this indicates a successful nose wheel re-centering and
steering recovery.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 105
CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Airbus Industrie A319, A320 and A321 Series Aeroplanes
AD/A320/187 Amdt 1 (continued)
Page 2 of 4
- Rearm the AUTO BRAKE, if necessary.
• If the WHEEL N/W STRG FAULT ECAM caution remains
displayed, this indicates that the nose wheel steering remains lost,
and that the nose wheels are not centered.
- During landing, delay nose wheel touchdown for as long as
possible.
- Refer to the ECAM STATUS

If the WHEEL N/W STRG FAULT ECAM caution appears, without the
L/G SHOCK ABSORBER FAULT ECAM caution:
- No specific crew action is requested by the WHEEL N/W STRG
FAULT ECAM caution procedure.
- Refer to the ECAM STATUS
2. Check the NLG strut inflation pressure, weight off and weight on wheels, in
accordance with AIRBUS Aircraft Maintenance Manual (AMM) 12-14-32 and
its associated TR issued on 13 November 2005; and
Perform a one time boroscopic inspection of the NLG upper support (backplate)
to detect anti-rotation lugs ruptured (completely broken), in accordance with
AIRBUS Technical Note 957.1901/05, dated 18 October 2005; and
Report the results of all inspections to AIRBUS.
3. If any upper support anti-rotation lugs are found ruptured (completely broken),
carry out all necessary actions to get a serviceable NLG.
4. Perform a boroscopic inspection of the NLG upper support lugs and carry out any
rectification as required. Rectification is detailed in SB A320-32-1310.
Terminating Action.
Installation of a NLG with new upper support anti-rotation lugs and new cylinder
lugs;
or
Installation of a NLG for which it can be demonstrated that is was never driven by
EMM BSCU L4.1 or L4.5;
Together with the installation of an EMM BSCU standard L4.8 or non EMM BSCU
provides terminating action to the requirements of this AD.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 105
CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Airbus Industrie A319, A320 and A321 Series Aeroplanes
AD/A320/187 Amdt 1 (continued)
Page 3 of 4
Note: EASA AD 2006-0174 dated 21 June 2006 refers. This AD supersedes DGAC
AD F-2005-191.
Compliance: 1. Remains unchanged as from 5 December 2005 (the effective date of the original
issue of this AD).
2. Within 100 flight cycles following an ECAM caution ‘L/G SHOCK ABSORBER
FAULT’ associated with at least one of the following Centralised Fault Display
System (CFDS) messages:
‘N L/G EXT PROX SNSR 24GA TGT POS’,
‘N L/G EXT PROX SNSR 25GA TGT POS’,
‘N L/G SHOCK ABSORBER FAULT 2526GM’.
3. Before further flight.
4. For aircraft that are equipped with EMM BSCU standard L4.1 or L4.5:
Prior to the accumulation of 20 months or 6000 flight hours or 4500 flight cycles
since first flight of the aircraft, whichever occurs first; or
Within 6 months, or 1800 flight hours or 1350 flight cycles following the
effective date of this AD, whichever occurs first.
Thereafter repeat the inspection at intervals not to exceed 6 months or 1800 flight
hours or 1350 flight cycles whichever occurs first.
For aircraft that are equipped with EMM USCU standard L4.8 or a non
EMM BSCU:
Prior to the accumulation of 20 months or 6000 flight hours or 4500 flight cycles
since first flight of the aircraft, whichever occurs first; or
Within 6 months, or 1800 flight hours or 1350 flight cycles following the
effective date of this AD.
Thereafter repeat the inspection at intervals not to exceed 20 months or 6000
flight hours or 4500 flight cycles whichever occurs first.
This Amendment becomes effective on 12 April 2007.
Background: An event where an A320 landed with the Nose Landing Gear (NLG) wheels rotated at
90 degrees to the aircraft centreline was recently reported.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 105
CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
　
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