(a)
The prefilter
(b)
The high-efficiency filter
B.
References
(1)
AMM 06-46-00/201, Entry, Service and Cargo Doors, Access Doors and Panels
(2)
AMM 24-22-00/201, Electric Power Control
C.
Access
(1)
Location Zones 125 Area aft of the forward cargo compartment (Left) 126 Area aft of the forward cargo compartment (Right)
D.
Prepare for Removal
S 864-002
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-003
(2)
Turn the L and R PACK selectors, on the overhead panel, P5, to the OFF position.
(a)
Make sure the PACK OFF lights come on.
(b)
Put DO-NOT-OPERATE tags on the selectors.
S 864-004
(3)
Push the applicable (L or R) RECIRC FAN switch/lights, on the P5 panel, to the off position.
(a)
Make sure the INOP light comes on.
(b)
Put a DO-NOT-OPERATE tag on the RECIRC FAN switch/light.
(4)
Open the No. 1 Cargo Door, 821 (AMM 06-46-00/201).
S 014-012
(5)
To remove the right recirculation filters, remove the right-recirculation-filter access-panel on the aft bulkhead of the forward cargo compartment.
E.
Remove the Left Recirculation Filters
S 014-005
S 014-014
(1)
Loosen the 1/4-turn studs on the cover of the forward face of the filter holder.
(2)
Remove the cover.
S 014-006
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21-25-02
ALL ú ú 06 Page 410 ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 024-007
(3) Pull the prefilter out of the filter holder.
NOTE:____The filter may be hard to move. It is held in position by springs which push the filter toward the mix manifold.
S 024-008
(4)
Pull the high efficiency filter out of the filter holder.
F.
Remove the Right Recirculation Filters
S 014-036
(1)
Remove the screws and washers from the forward face of the filter holder.
S 014-037
(2)
Remove the top retainer.
S 024-013
(3)
Pull the prefilter out of the filter support.
NOTE:____The filter may be hard to move. It is held in position by springs which push the filter toward the mix manifold.
S 024-038
(4) Pull the high efficiency filter out of the filter holder.
TASK 21-25-02-404-047
7. AIRPLANES WITH A TWO PIECE FILTER INSTALLATION; High Efficiency Recirculation Filter Installation (Fig. 401)_________________________________________________
A. General
(1)
There is a filter holder on each side of the mix manifold. The filters must be installed in the filter holders in this sequence:
(a)
The high-efficiency filter
(b)
The prefilter.
B.
References
(1)
AMM 06-46-00/201, Entry, Service and Cargo Doors, Access Doors and Panels
(2)
AMM 24-22-00/201, Electric Power Control
C.
Access
(1)
Location Zones 125 Area aft of the forward cargo compartment (Left) 126 Area aft of the forward cargo compartment (Right)
D.
Install the Left Recirculation Filters
S 424-043
(1)
Put the high efficiency filter through the forward face of the filter holder.
(a)
Push the filter inboard (to the mix manifold).
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