_ inches (50.80 mm) away from the trailing edge.
3) The visual delamination limits of the external cone surface are given as follows: a) No delamination or peeling is permitted on the
composite material surface.
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b) If the chipping, erosion or peeling of the black protective paint is more than 25 percent of the total external surface area, repair the surface before or during the subsequent regularly scheduled maintenance or overhaul (AMM 72-31-01/801).
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INLET CONE - REPAIRS
____________________
1. General_______
A. This procedure has four repairs for the inlet cone:
(1)
The installation of a replacement seal,
(2)
The repair of the polyurethane coating,
(3)
The repair of damage to the fiberglass surface.
(4)
The repair of damage to the bolt pocket corner on the front cone segment.
B.
The inlet cone is forward of the front compressor hub.
C.
You can go through the air inlet cowl to get access to the inlet cone.
TASK 72-31-01-968-001-N00
2. Inlet Cone Seal Repair (Fig. 801)______________________
A. General
(1)
The inlet cone seal will be referred to as the seal.
B.
Equipment
(1)
Mat - Protective, Rubber
Manufacturer's Association, Grade 5C43 neoprene
sponge, 1 inch thick, approximately 5x6 feet
with warning streamers attached (3 are
necessary).
C.
Consumable Materials
(1)
G00834 Cloth - Cotton, Lint-free
(2)
G01104 Cloth - Nonmetallic (No. 90 Grit)
(3)
A00482 Sealant - Silicone Rubber, RTV 159
(4)
B00740 Alcohol - Isopropyl (PMC 9094)
D.
References
(1)
AMM 72-31-01/401, Inlet Cone
(2)
IPC 72-31-01 Fig. 5
E.
Access
(1)
Location Zone
412 Engine 1 - Front LPC Hub
422 Engine 2 - Front LPC Hub
432 Engine 3 - Front LPC Hub
442 Engine 4 - Front LPC Hub
F.
Replace the Seal.
S 498-026-N00
CAUTION: MAKE SURE THAT YOU PUT COVERS ON ALL OF THE LOWER HALF OF THE
_______ INLET COWL SURFACE. ALSO MAKE SURE THAT THE EDGES OF THE MATS TOUCH OR ARE ATTACHED WITH SOME TAPE. IF THE EDGES ARE NOT, THEN THE TOOLS OR PARTS CAN FALL AND CAUSE DAMAGE TO THE INLET COWL SURFACE.
(1)
Put the protective mat on the inner, lower half of the inlet cowl.
(2)
Remove the inlet cone (AMM 72-31-01/401).
S 018-002-N00
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
Inlet Cone Seal Repair
Figure 801 (Sheet 1)
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ú ú N01 Page 802 ú Feb 10/97
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L-B39500
Inlet Cone Seal Repair Figure 801 (Sheet 2)
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