(a)
Align the marks on the rear segment of the inlet cone with the compressor hub.
(b)
Install the rear segment to the compressor hub with 19 bolts, with the threads lubricated with engine oil, and washers.
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(c)
Use a non-metalic blunt object and make sure the seal is installed under the fan blade platform leading edge before you tighten the bolts.
(d)
Tighten the bolts to 85-95 pound-inches (9.6-10.7
newton-meters).
S 424-010-N00
(3)
Install the front segment of the inlet cone:
(a)
Align the marks on the front and rear segments of the inlet cone.
(b)
Install the front segment with 6 bolts, with the threads lubricated with engine oil, and washers.
(c)
Tighten the bolts to 45-50 pound-inches
(5.1-5.7 newton-meters).
S 094-011-N00
(4)
Remove the protective mats from the inlet cowl.
S 864-012-N00
(5)
Remove the DO-NOT-OPERATE tags from the fuel control switches.
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INLET CONE - INSPECTION/CHECK
_____________________________
1. General
_______
A. This procedure gives two tasks: the first one is for the inspection of
the front and rear segments of the inlet cone, the second one (which is
included in the first one) is only for the external surface of the inlet
cone.
(1)
The second inspection is for regular maintenance.
B.
Limits are given for the airplane to continue in service or for it to
turn around and go back to the airport.
C.
You must remove the front segment of the inlet cone to do the inspection.
TASK 72-31-01-206-001-N00
2. Inlet Cone Inspection (Fig. 601)
_____________________
A. General
(1)
Length to depth (L/D) ratio equals five unless otherwise noted.
(2)
Limits apply to damaged area after blending and not to magnitude of damage measured before blending.
B.
Consumable Materials
(1)
G01077 Paper - Emery (No. 250 Grit)
C.
References
(1)
AMM 72-31-01/401, Inlet Cone
(2)
AMM 72-31-01/801, Inlet Cone
(3)
IPC 72-31-01 Fig. 5
D.
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
E.
Procedure
(1)
Do this task: "Inlet Cone Removal" (AMM 72-31-01/401).
S 226-003-N00
(2)
Examine the inlet cone segments for chipping, cracks and
delamination:
S 016-002-N00
NOTE: Chipping is an area with erosion where small particles of
____ surface material are gone. Chipping is pitting that was not caused by corrosion.
(a) Examine the external surface of the inlet cone segments for chipping, visual cracks and delamination caused by foreign object damage (FOD).
NOTE: FOD is caused by bird strike, ice that enters the inlet
____
cowl, or tools.
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