Subtask 31-63-22-420-055
 L. Installation of the lower ECAM DU in place of the PFD F/O
 (1)
 Clean the component interface and/or the adjacent area.

 (2)
 Do an inspection of the component interface and/or the adjacent area.

 (3)
 In the housing (8), make sure that:

 -
the ventilation air inlet (7) is in the correct condition (flexible seal installed and duct not blocked)

 -
the locking studs (5) and the movable locking hooks (6) are not damaged.

 (4)
 Make sure that the electrical connectors are clean and in the correct condition.

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 (5)
 Install the unit (2) in the panel opening previously fitted with the PFD just removed. Fully move down the handle (3) to the bottom of the screen.

 (6)
 Push the unit until the locking studs (5) touch the movable locking hooks (at this time, the face of the unit must be out of the panel by approximately 3 cm).

 (7)
 Push the two sides of the unit (2) to connect the electrical connector (1). Let the handle (3) move up freely until it is at the level of the locking catches (4) (the unit is now in line with the panel).

 (8)
 Slowly and continuously move the handle (3) to its maximum position. In this position the two locking catches (4) are locked under the handle (3).

 Subtask 31-63-22-420-056
 M. Installation of the remaining PFD CAPT in place of the lower ECAM DU
 (1)
 Clean the component interface and/or the adjacent area.

 (2)
 Do an inspection of the component interface and/or the adjacent area.

 (3)
 In the housing (8), make sure that:

 -
the ventilation air inlet (7) is in the correct condition (flexible seal installed and duct not blocked)

 -
the locking studs (5) and the movable locking hooks (6) are not damaged.

 (4)
 Make sure that the electrical connectors are clean and in the correct condition.

 (5)
 Install the unit (2) in the panel opening previously fitted with the just removed lower ECAM DU. Fully move down the handle (3) to the bottom of the screen.

 (6)
 Push the unit until the locking studs (5) touch the movable locking hooks (at this time, the face of the unit must be out of the panel by approximately 3 cm).

 (7)
 Push the two sides of the unit (2) to connect the electrical connector (1). Let the handle (3) move up freely until it is at the level of the locking catches (4) (the unit is now in line with the panel).

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 (8) Slowly and continuously move the handle (3) to its maximum position. In this position the two locking catches (4) are locked under the handle (3). Install the thermoformed cover on the CAPT main instrument panel. Install the thermoformed cover on the F/O main instrument panel. Install the thermoformed cover on the center instrument panel.
 Subtask 31-63-22-865-054
 N. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
R  -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU EIS/ECAM DU/UPPER/SWTG 24WT1 E06 49VU EIS/ECAM DU/UPPER/SPLY 13WT1 E05 49VU EIS/PFD CAPT/SWTG 22WT1 E04 
R  **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302, 
R  49VU EIS/PFD CAPT/SPLY  11WT1  E03 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399, 
R R  49VU EIS/ND CAPT/SWTG 49VU EIS/ND CAPT/SPLY  23WT1 12WT1  E02 E01 
R  **ON A/C 106-149, 303-399, 
R  49VU EIS/PFD/CAPT/SPLY  11WT1  E03 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399, 
R R R R R R  121VU EIS/ECAM DU/LOWER/SPLY 121VU EIS/ECAM DU/LOWER/SWTG 121VU EIS/ND/F/O/SWTG 121VU EIS/PFD/F/O/SWTG 121VU EIS/ND/F/O 121VU EIS/PFD/F/O  13WT2 24WT2 23WT2 22WT2 12WT2 11WT2  R11 R10 R06 R05 R04 R03 

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 P. Do the operational test of the Electronic Instrument System (EIS)
 (Ref. TASK 31-60-00-710-001).

 Subtask 31-63-22-710-053
 Q. VALID whenever the PFD or ND have been removed: If the A/C is operated in CAT3 conditions, you must also do this test (Ref. TASK 22-97-00-710-001).
　
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