757
MAINTENANCE MANUAL
RIGHT MIX MANIFOLD MIX MANIFOLD
RECIRCULATION DUCT
FILTER
SEE A
TOP RETAINER
SCREW
AIR-
LEFT FLOW
RECIRCULATION HIGH EFFICIENCY
FILTER (HEPA) FILTER
SEE B
FILTER
SUPPORT
MIX MANIFOLD FWD INBD RIGHT RECIRCULATION FILTER A
FILTER SUPPORT
FLOW AIR- ASSEMBLY (20 LOCATIONS) 1/4-TURN STUD COVER
HIGH EFFICIENCY (HEPA) FILTER
INBD FWD
MIX MANIFOLD DUCT B LEFT RECIRCULATION FILTER
Recirculation Air Filter
Figure 401 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. 757-200 AIRPLANES WITH A ú
21-25-02
SINGLE FILTER INSTALLATION; ú ú 07 Page 403 ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
M46344
A
757
MAINTENANCE MANUAL
S 864-165
(2)
Turn on 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 864-166
(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.
S 014-167
(4)
Open the No. 1 Cargo Door, 821 (AMM 06-46-00/201).
S 014-168
(5)
To remove the right recirculation HEPA filter, remove the right recirculation filter access panel on the aft bulkhead of the forward cargo compartment.
E.
Remove the Left Recirculation HEPA filter
S 014-169
(1)
Loosen the 1/4-turn studs on the cover of the forward face of the filter holder.
S 014-170
(2)
Remove the cover.
S 024-171
(3)
Pull the HEPA filter out of the filter holder.
F.
Remove the Right Recirculation HEPA filter
S 014-172
(1)
Remove the screws and washers from the forward face of the filter holder.
(2)
Remove the top retainer.
S 014-173
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-25-02
ALL ú ú 07 Page 404 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 024-162
(3) Pull the HEPA filter out of the filter support.
TASK 21-25-02-404-174
3. AIRPLANES WITH A SINGLE FILTER INSTALLATION; Recirculation HEPA Filter Installation (Fig. 401, 401A)______________________________________
A. General
(1)
There is a filter holder on each side of the mix manifold. Each filter holder has this filter:
(a)
A HEPA 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.
Left Recirculation HEPA Filter Installation
S 424-178
(1)
Put the HEPA filter through the forward face of the filter holder.
(a)
Push the filter inboard (to the mix manifold).
S 414-179
(2)
Put the cover assembly on the filter holder.
S 414-180
(3)
Tighten the 1/4-turn studs to hold the cover in position.
E.
Right Recirculation HEPA Filter Installation
S 424-189
(1)
Put the HEPA filter through the forward face of the filter holder.
(a)
Push the filter outboard (away from the mix manifold).
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