(52) and the nut (51) at the duct (46).
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 (7)
 Installation of the bleed-air ducts and the seals in the crossbleed section (RH) (Ref. Fig. 406/TASK 36-12-41-991-007)

 (a)
 Install the seals (122) in the housing (123).

 (b)
 Connect the duct (121) and the housing (123) with the duct (124).

 (c)
 Install the clamp (120).

 (d)
 Install the crossbleed valve (130) with the clamps (129), (131) (Ref. TASK 36-12-52-400-001).

 (e)
 Install the wire rope assemblies (140) with the bolts (139), the washers (142) and the nuts (141) at the duct (121).

 (f)
 Install the bonding strap (126) with the bolt (125), the washer

 (127) and the nut (128) at the duct (121).

 (8)
 Installation of the bleed-air ducts and the seals in the area of the heat exchanger units (Ref. Fig. 407/TASK 36-12-41-991-008)

 (a)
 Install the seals (221).

 (b)
 Connect the sleeve (222) to the duct (234).

 (c)
 Put the duct (234) in the installation position

 (d)
 Install the clamp with the bolt (223), the washer (219) and the nut (220).

 (e)
 Install the clamp (214).

 (f)
 Connect the support rods (228) to the duct (234).

 (g)
 Install the bolts (227), the washers (229) and the nuts (230).

R  (h) Install the clamp (216) and the new packing (217) at the duct (234).
 (i)
 Install the bonding strap (233) with the bolt (215), the washer

 (232) and the nut (231) at the duct (234).

 (j)
 Install the bonding strap (226) with the bolt (218), the washer

 (225) and the nut (224) at the duct (234).

 (k)
 Install the heat exchanger units (Ref. TASK 21-52-24-400-001).

 (9) Installation of the APU bleed-air ducts and the seals in the fuselage area (AFT) (Ref. Fig. 408/TASK 36-12-41-991-012)
 (a)
 Install the seal (192) in the duct (191).

 (b)
 Put the duct (191) in the installation position.

 (c)
 Install the clamp (190) at the duct (191).

 (d)
 Install the rods (199) with the bolts (198), the washers (201) and the nuts (200) at the duct (191).

 (e)
 Obey the clearance tolerances between the ducts (Ref. TASK 36-12-41-400-001).

 (f)
 Install the bonding strap (196) with the bolt (197), the washer

 (195) and the nut (194) at the duct (191).
 (10)
 Installation of the seals of the pressure regulating valve (14HK) (Ref. Fig. 409/TASK 36-12-41-991-013)

 (a)
 Install the seals (265) on the pressure regulating valve (14HK).

 (b)
 Install the pressure regulating valve (14HK) (Ref. TASK 21-63-52-400-001).

 (11)
 Installation of the seals of the trim-air check valves (18HM) and (19HM) (Ref. Fig. 410/TASK 36-12-41-991-014)

 (a)
 Install the seals (270) and seals (271) on the trim-air check valves (18HM) and (19HM).

 (b)
 Install the trim-air check valves (18HM) and (19HM) (Ref. TASK 21-63-42-400-001).

 (12)
 If removed, install the overheat sensing-elements at the applicable APU bleed-air ducts (Ref. TASK 36-22-18-400-001).

 Subtask 36-12-41-865-054
 C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1HV, 2HV, 2HA1, 2HA2, 3HA1, 3HA2
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 Subtask 36-12-41-790-051
 D. Test
 (1)
 Do the leak check of the bleed air supply system (Ref. TASK 36-12-00-790-003).

 (2)
 Do the operational test of the overheat detection system (Ref. TASK 36-22-00-710-001).

 5. Close-up
________ R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 Subtask 36-12-41-410-052
 A. Close Access
 (1)
 If removed, install the insulation at the applicable APU bleed-air ducts.

 (2)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (3)
 Install the access panels 191BB, 191KB, 192FB and 192KB (Ref. TASK 53-35-13-400-002).

 (4)
 Install the access panels 191JB, 147EB, 147FB and 197BB (Ref. TASK 53-35-13-400-001).

 (5)
 Remove the warning notice(s).

 (6)
 Remove the ground support and maintenance equipment, the special and standard tools and all other items.
　
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