Material No. 15-007 AIB TN 10138 TYPE II GRADE 1 CORROSION PREVENTIVE TEMPORARY PROTECTIVE COMPOUND (Ref. 20-31-00)
Material No. 19-003 USA AMS 3819
LINT-FREE COTTON CLOTH (Ref. 20-31-00)
C. Referenced Information
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REFERENCE DESIGNATION
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20-28-00-912-004 Electrical Bonding of Components With Conductive Bolts and Screws and Bonding Straps in the Fuselage
R and in the Wings (this does not include the tanks)-27-84-00-710-001 Operational Test of the Slat System 27-81-18-991-001 Fig. 401
3. Job Set-up
__________
Subtask 27-81-18-941-056
A. Safety Precautions
(1)
Make sure that the safety barriers are in position.
(2)
Make sure that the warning notice is in position to tell persons not to operate the slat system.
Subtask 27-81-18-860-051
B. Aircraft Maintenance Configuration
(1)
Make sure that the slats are fully retracted, if the APPU is a replacement.
(2)
Make sure that the TOOL-ZERO LOCKING, FLAP SLAT CTL LEVER is installed on the flap/slat control lever.
(3)
Make sure that the applicable access panel is removed:
-
for the left wing, panel 522UB
-
for the right wing, panel 622UB.
Subtask 27-81-18-865-051
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 5CV B06 121VU FLIGHT CONTROLS/WTB/SLT/SYS2 11CV P19 121VU FLIGHT CONTROLS/SLT/CTL/SYS2 7CV R21 122VU FLIGHT CONTROLS/WTB/SLT/SYS1 9CV S06
4. Procedure
_________
(Ref. Fig. 401/TASK 27-81-18-991-001)
Subtask 27-81-18-420-051
A. Preparation for Installation
(1)
Use a MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-026) to clean:
-
the interface of the APPU (5)
-
the adaptor plate (12)
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the bolts (6)
-
the washers (7).
(2)
Make sure that the parts retained from the removed component are clean and in the correct condition.
(3)
Do an inspection of the component interface and/or the adjacent area.
(4)
Examine the APPU (5) and the interface of the adaptor plate (12) for damage, cracks and corrosion.
(5)
If you install a new APPU (5) make sure that:
-
the zero marks in the viewing window align with their applicable fixed pointers (Detail D)
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the zero marks on the drive shaft (10) and the APPU (5) align with each other (Detail C).
Subtask 27-81-18-420-052
B. Installation of the Assymetry-Postion Pick-Off Unit (APPU)
CAUTION : MAKE SURE THAT THE SYSTEM IS IN ITS ZERO DEGREE POSITION BEFORE
_______ YOU INSTALL THE APPU. A NEW APPU IS SUPPLIED LOCKED IN THE MECHANICAL AND ELECTRICAL ZERO POSITION.
(1) Remove the tie-wrap (8) from behind the locking plate (11).
1EFF : ALL 1 27-81-18Page 407 1 1 May 01/05R 1 1 1CES 1
(2)
Install the bonding strap (13) with the washer (2) and the screw (1) (Ref. TASK 20-28-00-912-004).
(3)
Install the APPU:
CAUTION : DO NOT USE THE INSTALLATION BOLTS TO ENGAGE THE APPU DRIVE
_______ IN THE COUPLING. IF YOU DO, THIS WILL CAUSE:
-THE COUPLING TO DISCONNECT
-
DAMAGE TO THE SPLINES
-
DAMAGE TO THE APPU.
(a)
Position the APPU (5) on the adaptor plate (12). Make sure that the housing keyway and the key in the adaptor plate (12) align correctly.
(b)
Engage the APPU drive shaft (10) in the splines of the bellows coupling (9).
