**ON A/C ALL
Subtask 21-52-43-420-050
A. Installation of the Pack Downstream Check-Valve NOTE : Access to the pack downstream check-valves must be obtained from
____
both outside and inside the aircraft.
Two persons are recommended for this procedure.
(1) FOR 15HM
(a)
Remove the protective covers from the bellows (1), the check valve (6) and the flange (8).
(b)
Make sure that the valve flaps in the check valve are in the correct condition.
(c)
Clean the component interface and/or the adjacent area.
(d)
Make sure that the parts retained from the removed component are clean and in the correct condition.
(e)
Make sure that the gasket (5) is in a good condition. If necessary replace the gasket (5).
(f)
Put the gasket (5) in position on the check valve (6).
(g)
Put the check valve (6) in positon and install the washers (4) and the bolts (3).
(h)
TORQUE the bolts (3) to between 0.43 and 0.53 m.daN (38.05 and
46.90 lbf.in).
(i)
Put the bellows (1) in position on the check valve (6) and install the clamp (2).
(j)
Make sure that the flange (8) is in position on the check valve
(6) and install the clamp (7).
(k)
TORQUE the clamp (7) to between 0.509 and 0.564 m.daN (45.04 and
49.91 lbf.in).
(l)
Put the bonding strap (11) in position and install the washer (10), the bolt (9) and the nut (12) (Ref. TASK 20-28-00-912-004).
1EFF : ALL 1 21-52-43Page 418 1 1 Aug 01/05R 1 1 1CES 1
(m) Make sure that the work area is clean and clear of tool(s) and other items.
(2) FOR 16HM
(a)
Remove the protective covers from the bellows (21), the check valve (26), the duct assembly (29) and the flange (42).
(b)
Make sure that the valve flaps in the check valve are in the correct condition
(c)
Clean the component interface and/or the adjacent area.
(d)
Make sure that the parts retained from the removed component are clean and in the correct condition.
(e)
Make sure that the gasket (5) and the O-ring (28) are in a good condition. If necessary replace the gasket (5) and/or the O-ring (28).
(f)
Put the gasket (5) in position on the check valve (26).
(g)
Put the check valve (26) in position and install the washers (25) and the bolts (24).
(h)
TORQUE the bolts (24) to between 0.43 and 0.53 m.daN (38.05 and
46.90 lbf.in).
(i)
Put the bellows (21) in position on the check valve (26) and install the clamps (22) and (23).
(j)
Put the O-ring (28) in position on the duct assembly (29).
(k)
Put the duct assembly (29) in position and install the clamps
(27) and (41).
NOTE : Do not fully tighten the clamps (27) and (41) at this
____
time.
(l)
Put the tie-rods (43) and (44) in position and install the bolts
(35) and (38), the washers (36) and (39), and the nuts (37) and (40).
(m)
TORQUE the clamps (27) and (41) to between 0.509 and 0.564 m.daN
(45.04 and 49.91 lbf.in).
1EFF : ALL 1 21-52-43Page 419 1 1 Aug 01/05R 1 1 1CES 1
(n) Put the bonding straps (32) and (33) in position and install the washer (31), the bolt (30) and the nut (34) (Ref. TASK 20-28-00-912-004).
(o) Make sure that the work area is clean and clear of tool(s) and other items.
Subtask 21-52-43-865-053
B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 15HM
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
49VU AIR COND/FLOW/CTL &/IND1 1HB D07
R **ON A/C 401-499,
49VU AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC 52HH D08
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
R 122VU AIR COND/FLOW/MIXER/FLAP 122VU AIR COND/FLOW/CTL AND IND/2 122VU AIR COND/ZONE TEMP CTL/28VDC/SYS2 122VU AIR COND/ZONE TEMP CTL/28VDC/SYS1 122VU AIR COND/ZONE TEMP CTL/115VAC/SYS2 122VU AIR COND/ZONE TEMP CTL/115VAC/SYS1 122VU AIR COND/PACK TEMP/CTL SYS1/1/115VAC 122VU AIR COND/PACK TEMP/CTL SYS1/1/28VDC 3HB 2HB 4HK 3HK 2HK 1HK 1HH 3HH V22V21V20V19V18V17X22X21
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