1.0 INCH
(25.400 mm) MINIMUM DISTANCE BETWEEN REPAIR AREAS
L-B8643
Fan Exit Liner Segments - Repair Figure 801 (Sheet 2)
M46861
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72-34-01
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1.00 INCH (25.400 mm)
MAXIMUM DIAMETER OF
THE DAMAGE IN ANY
L-B8644
Fan Exit Liner Segments - Repair Figure 801 (Sheet 3)
M46985
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(6) S 348-012-N00Apply Epoxy Adhesive Paste with a wooden or plastic scraper under the wire brush. Make sure that all edges of wire mesh are covered by Epoxy Adhesive Paste.
(7) S 348-013-N00Apply Epoxy Adhesive Paste in any gaps between wire mesh and organic fiber cloth to keep the contour.
(8) S 348-014-N00Make the repair area smooth and remove unwanted Epoxy Adhesive Paste.
(9) S 348-015-N00Apply a layer of Mold Release on the mold. Put the mold on the repaired area and clamp with sufficient pressure to hold the contour.
S 348-016-N00
(10)
Cure the liner at room temperature for 2 hours minimum, followed by 1 hour at 140° . 160° F (60° . 71° C).
S 348-017-N00
(11)
File or sand the repair area until you get a smooth continuous surface.
S 148-023-N00
(12)
Clean the sanded surface with a clean cloth wet with solvent (AMM 70-42-04/201). Permit the area to dry for a minimum of 30 minutes.
(a)
Mix 4 parts by weight of Epoxy Resin, with 1 part by weight of Epoxy curing agent.
S 348-019-N00
(13)
Apply a thin layer of epoxy resin mixture on the sanded area and any organic fiber cloth. This will seal the area.
S 348-020-N00
(14)
Cure the sealer 160° . 190° F (71° . 88° C) for 1 hour with heat gun or blanket.
S 428-021-N00
(15)
Install the liner segment on the compressor intermediate case (AMM 72-34-01/401).
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FAN EXIT LINER SEGMENT (INNER REAR) - REMOVAL/INSTALLATION
__________________________________________________________
1. General
_______
A. This procedure gives two removal and installation tasks for the (inner rear) fan exit liner segments. These fan exit liner segments will be referred to as the liner segments.
B. The first two tasks are used if you will install the same liner segment that you removed. The second removal and installation tasks are used if you will replace the liner segment.
(1) ENGINES PRE-PW-SB 72.546; The eight liner segments are on the inner rear circumference of the intermediate case, aft of the fan case. The liner segments are referred to as follows:
NOTE: The buffer air cooler for the No. 3 bearing is between the
____ 1:30 and 3 o'clock struts. To remove and install it, refer to AMM 75-22-01/401.
~.............................................................................. | Liner | PWA | | | Segment | Part Number | Location | ................................................................................ | No. 1 | PN 50A508 or 51A166-01 | Between the 12 and 1:30 o'clock struts | ................................................................................ | No. 2 | PN 50G281 or 51A163-01 | Between the 3 and 4:30 o'clock struts | ................................................................................ | No. 3 | PN 50G279 or 51A162-01 | Between the 4:30 and 5:30 o'clock struts | ................................................................................ | No. 4 | PN 50G273 or 51A173 | Between the 5:30 and 6:30 o'clock struts | ................................................................................ | No. 5 | PN 50G440 or 51A164-01 | Between the 6:30 and 7:30 o'clock struts | ................................................................................ | No. 6 | PN 50G278 or 51A161-01 | Between the 7:30 and 9 o'clock struts | ................................................................................ | No. 7 | PN 50G277 or 51A160-01 | Between the 9 and 10:30 o'clock struts | ................................................................................ | No. 8 | PN 50G276 or 51A159-01 | Between the 10:30 and 12 o'clock struts | 2.........….........................…..........................................1
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