(2)
 Make sure that the access platform is in position at the access door 811 and that the access door 811 is open.

 (3)
 In the cockpit make sure that there is a warning notice on the center pedestal to tell persons not to operate the weather radar.

 NOTE : Remove the blanking caps before you install parts of the wave
____ guide. Make sure that all mating surfaces are clean and in correct condition.
 NOTE : Each part of the wave guide is identified (ANT, 1, 2, 3, 4 and
____ RT or ANTENNE 1, 2, 3, 4 and EMETTEUR depending on the Vendor marking). When you install the wave guide part, make sure that the number sequence is correct.
 1EFF : ALL 1 34-41-41Page 407 1 1 Feb 01/98 1 1 1CES 1 Subtask 34-41-41-865-051

 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
 -------------------------------------------------------------------------------
121VU COM NAV/RADAR/1 5SQ1 K13

R **ON A/C 051-099,
R 121VU COM NAV/RADAR/2 5SQ2 K14
R **ON A/C ALL
 4. Procedure
_________
 (Ref. Fig. 401/TASK 34-41-41-991-001)
 Subtask 34-41-41-420-050
 A. Installation of the Flexible Wave Guide Part (1) Connected to the Antenna Drive
 (1)
 Install a new O-ring (41) and put the flange (ANT reference) in position.

 (2)
 Lock the quick-disconnect attach (40).

 (3)
 At the other end, install a new O-ring (3) and connect the flanges

 (2) and (4).

 (4)
 Install the four washers (39) and the four screws (38). TORQUE the screws to between 0.19 and 0.21 m.daN (16.81 and 18.58 lbf.in) and install the corrosion resistant steel lockwire dia. 0.5 mm (0.020 in.).

 (5)
 Install the two half bushings (22) and the clamp (19) on the wave guide. Put the clamp in position and install the washer (20) and the screw (21).

 1EFF : ALL 1 34-41-41Page 408 1 1 May 01/05 1 1 1CES 1 Subtask 34-41-41-420-051

 B. Installation of the Rigid Wave Guide Part (37) in the Radome
 (1)
 If necessary, install the wave guide feedthrough (25). Refer to Para.

 C. below.

 (2)
 At the two ends, install new O-rings (3) and (28).

 (3)
 Hold the rigid wave guide part (37) in position: install the eight washers (31) and (39) and the eight screws (30) and (38).

 (4)
 Tighten the screws and install lockwire.

 (5)
 Install the two half bushings (22) and the clamp (19) on the wave guide. Put the clamp in position and install the washer (20) and the screw (21).

 Subtask 34-41-41-420-052
 C. Installation of the Wave Guide Feedthrough (25) NOTE : Two persons are necessary to install the wave guide feedthrough.
____
 (1)
 Install a new packing (26) and put the feedthrough (25) into the cutout of the pressure bulkhead (27).

 (2)
 Install the eight screws (34), the washers (33) and the nuts (32). TORQUE the nuts to between 0.19 and 0.21 m.daN (16.81 and 18.58 lbf.in). Seal the nuts with SEALANTS (Material No. 09-016).

 (3)
 If necessary, install the rigid wave guide parts (14) and (37) which are connected to the feedthrough. Refer to Para. B. above and to Para. D. below.

 Subtask 34-41-41-420-053
 D. Installation of the Rigid Wave Guide Part (14) in the Avionics
 Compartment

 (1)
 If necessary, install the wave guide feedthrough (25). Refer to Para.

 C. above.

 (2)
 At the two ends, install new O-rings (24) and (8).

 (3)
 Hold the rigid wave guide part (14) in position and install eight washers (35) and (6) and eight screws (36) and (5).

 (4)
 TORQUE the screws to between 0.19 and 0.21 m.daN (16.81 and 18.58 lbf.in) and install the lockwire.

 1EFF : ALL 1 34-41-41Page 409 1 1 May 01/05R 1 1 1CES 1

 (5) Install the two half bushings (22) and the clamp (19) on the wave guide. Put the clamp in position and install the washer (20) and the screw (21).
 Subtask 34-41-41-420-054
 E. Installation of the Flexible Wave Guide Part (10) Connected to the Mounting Tray of the Weather Radar Transceiver
 (1)
 Install a new O-ring (8) and connect the flange (9) to the flange (7).

 (2)
 Install the four washers (6) and the four screws (5). TORQUE the screws to between 0.19 and 0.21 m.daN (16.81 and 18.58 lbf.in) and install the lockwire.

 (3)
　
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