_
-
the APU BLEED pushbutton switch is in the off position (the ON legend is off) and
-
the ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (the OFF legend is on).
2 Put a warning notice in position to tell persons not to
_ operate these pushbutton switches.
(b) On the HP and the LP ground connectors: 1 Put a warning notice in position to tell persons not to supply
_
the ground air.
**ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
Subtask 21-28-52-010-050
E. Get Access
(1)
Open the AFT cargo-compartment door 826 (Ref. TASK 52-30-00-860-001).
(2)
Put the access platform in position at the AFT cargo-compartment door
826.
(3)
Remove the access panel:
(a)
FOR 33HN
162DW (Ref. TASK 25-55-12-000-001).
(b)
FOR 34HN
151EW (Ref. TASK 25-55-11-000-003).
R **ON A/C 151-199, 401-499,
Subtask 21-28-52-010-050-A
E. Get Access
(1)
Open the AFT cargo-compartment door 826 (Ref. TASK 52-30-00-860-001).
(2)
Put the access platform in position at the AFT cargo-compartment door
826.
(3)
Remove the access panel:
R (a) FOR 33HN 162DW (Ref. TASK 25-55-12-000-001).
R (b) FOR 34HN 151VW (Ref. TASK 25-55-11-000-003).
**ON A/C ALL
4. Procedure
_________
**ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
(Ref. Fig. 401/TASK 21-28-52-991-001) R **ON A/C 151-199, 401-499,
(Ref. Fig. 401A/TASK 21-28-52-991-001-A)
**ON A/C ALL
Subtask 21-28-52-020-050
A. Removal of the Isolation Valve
(1)
FOR 34HN
(a)
Disconnect the electrical connector (10).
(b)
Put blanking caps on the disconnected electrical connectors.
(c)
Remove the nut (5), the washer (6), the screw (7), the washer (8) and disconnectthe bonding strap (9).
(d)
Remove the clamp (12) and disconnect the sleeve (1).
(e)
Hold the isolation valve (11) and remove the clamp (3).
(f)
Remove the isolation valve (11).
(g)
Put blanking plugs on the open ends of the isolation valve (11), the sleeve (1) and the duct flange (2).
(2)
FOR 33HN
(a)
Disconnect the electrical connector (18).
(b)
Put blanking caps on the disconnected electrical connectors.
(c)
Remove the nut (23), the washer (22), the screw (19), the washer
(20) and disconnect the bonding strap (21).
(d)
Remove the clamp (16) and disconnect the sleeve (15).
(e)
Remove the clamp (25).
(f)
Hold the isolation valve (24) and remove the clamp (17).
(g)
Remove the isolation valve (24).
(h)
Put blanking plugs on the open ends of the isolation valve (24), the sleeve (15) and the duct flange (13).
1EFF : ALL 1 21-28-52Page 405 1 1 Aug 01/05R 1 1 1CES 1
AFT Cargo Isolation Valves Figure 401/TASK 21-28-52-991-001- 12 (SHEET 1)
R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 21-28-52Page 406 1301-399, 1May 01/05 1 1 1CES 1
AFT Cargo Isolation Valves Figure 401/TASK 21-28-52-991-001- 22 (SHEET 2)
R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 21-28-52Page 407 1301-399, 1May 01/05 1 1 1CES 1
AFT Cargo Isolation Valves
Figure 401A/TASK 21-28-52-991-001-A12 (SHEET 1)
R 1EFF : 151-199, 401-499, 1 21-28-52Page 408 1 1 Aug 01/05 1 1 1CES 1
AFT Cargo Isolation Valves
Figure 401A/TASK 21-28-52-991-001-A22 (SHEET 2)
R 1EFF : 151-199, 401-499, 1 21-28-52Page 409 1 1 Aug 01/05 1 1 1CES 1 TASK 21-28-52-400-001
Installation of the AFT Cargo-Compartment Ventilation Isolation-Valves
(33HN,34HN)
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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