(k) Remove and discard the seals (3).

 (2)
 Removal of the bleed-air ducts and the seals in the crossbleed section (MID) (Ref. Fig. 405/TASK 36-12-41-991-006)

 (a)
 Remove the nut (51), the washer (52), the bolt (44) and the bonding strap (40) from the duct (46).

 (b)
 Remove the nuts (54), the washers (55), the bolts (53) and disconnect the rods (56) from the duct (46).

 (c)
 Remove the clamps (43), (45) and (50).

 (d)
 Remove the clamp (48) from the bracket (49).

 (e)
 Disconnect the ducts (42) and (46).

 (f)
 Remove and discard the seals (41).

 (3)
 Removal of the bleed-air ducts and the seals in the crossbleed section (RH) (Ref. Fig. 406/TASK 36-12-41-991-007)

 (a)
 Remove the nut (128), the washer (127), the bolt (125) and the bonding strap (126) from the duct (121).

 (b)
 Remove the nuts (141), the washers (142), the bolts (139) and disconnect the wire rope assemblies (140) from the duct (121).

 (c)
 Remove the clamp (120).

 (d)
 Remove the clamps (129), (131) and remove the crossbleed valve

 (130) (Ref. TASK 36-12-52-000-001).

 (e)
 Disconnect the duct (121) and the housing (123) from the duct (124).

 (f)
 Remove and discard the seals (122).

 (4)
 Removal 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)

R R  (3) If necessary, remove the insulation from the applicable APU bleed-air ducts. 
R R  (4) If necessary, remove the overheat sensing-elements from the applicable APU bleed-air ducts (Ref. TASK 36-22-18-000-001). 
R  (5) Remove the heat exchanger units (Ref. TASK 21-52-24-000-001). 
R  **ON A/C ALL
 4. Procedure_________
 Subtask 36-12-41-020-052
 A. Removal of the Bleed-Air Ducts and the Seals
 (1) Removal of the bleed-air ducts and the seals in the crossbleed section (LH) (Ref. Fig. 404/TASK 36-12-41-991-005)
 (a) Remove the nut (21), the washer (18), the bolt (19) and the bonding straps (17), (20) from the duct (15).
 (b) Remove the nuts (28), the washers (27), the bolts (26) and disconnect the rods (29) from the duct (15).
 (c) Remove the clamps (1), (11) and (12) from the duct connections.
 (d) Remove the clamps (13) from the brackets (14).
 (e) Remove the bearing boxes (10) from the duct (15).
 (f) Remove the duct (15).
 (g) Remove and discard the seal (16).
 NOTE : Do the subsequent worksteps also at the bleed-air ducts of____ the RH pack inlet.
 (h) Remove the nut (9), the washer (8), the bolt (6) and the bonding strap (7) from the duct (2).
 (i) Remove the nuts (24), the washers (25), the bolts (22) and disconnect the wire rope assemblies (23) from the duct (2).
 (j) Disconnect the duct (2) and the housing (4) from the duct (5).

 Bleed-Air Ducts in the Crossbleed Section (LH) Figure 404/TASK 36-12-41-991-005
 1EFF : 1 1R 1CES  ALL  1 11 1 36-12-41 Page 430 May 01/04

 (a) Remove the nut (231), the washer (232), the bolt (215) and the bonding strap (233) from the duct (234).
 1EFF : ALL 1 36-12-41Page 431 1 1 May 01/04R 1 1 1CES 1

 Bleed-Air Ducts in the Crossbleed Section (RH) Figure 405/TASK 36-12-41-991-006
 1EFF : 1 1R 1CES  ALL  1 11 1 36-12-41 Page 432 May 01/04

 Bleed-Air Ducts in the Crossbleed Section (RH) Figure 406/TASK 36-12-41-991-007
 1EFF : 1 1R 1CES  ALL  1 11 1 36-12-41 Page 433 May 01/04

 Bleed-Air Ducts in the Area of the Heat Exchanger Unit
 Figure 407/TASK 36-12-41-991-008

 1EFF : ALL 1 36-12-41Page 434 1 1 May 01/04R 1 1 1CES 1

 (b)
 Remove the nut (224), the washer (225), the bolt (218) and the bonding strap (226) from the duct (234).

 (c)
 Remove the nut (220), the washer (219) and the bolt (223) from the clamp.

 (d)
 Remove the clamp (216) and the packing (217) from the duct (234).

 (e)
 Discard the packing (217).

 (f)
 Remove the clamp (214).

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

 (h)
 Disconnect the support rods (228) from the duct (234).

 (i)
 Remove the duct (234).

 (j)
 Remove the sleeve (222) from the duct (234).