S 434-009-N00
(2) Install the hinge assemblies in the bushings.
NOTE: Use the washers when it is necessary to get the correct
____ tolerance on the surface of the inlet cowl.
S 424-010-N00
(3)
Align the vent with the roll pins in the hinge assemblies.
S 434-011-N00
(4)
Use a drift punch on the inner side of the vent to push the roll pins until they are smooth with the outer surface of the vent.
S 644-012-N00
(5)
Apply the sealant to the bolts.
S 434-016-N00
(6)
Install the bolts, nuts, and washers that attach the hinge assemblies to the vent.
(7)
Adjust the latches and hinges on the vent (AMM 71-11-03/501).
(8)
Close the vent.
S 824-013-N00
S 414-014-N00
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-11-03
ALL ú ú N01 Page 403 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
INLET COWL PRESSURE RELIEF VENT - ADJUSTMENT/TEST
_________________________________________________
1. General
_______
A. Two tasks are given in this procedure. The first task is used to do a latch test for the pressure relief vent on the inlet cowl. The second task is used to do an adjustment of the aerodynamic smoothness for the pressure relief vent.
(1)
The latch test is used to make sure the latches release at the correct pressure. To do this test, you apply a load to the latches.
(2)
The adjustment of the aerodynamic smoothness is used to make sure the pressure relief vent is in the correct tolerances.
B.
The pressure relief vent on the inlet cowl is a vent for the thermal anti-icing air. This vent is also a pressure relief vent for the inlet cowl.
TASK 71-11-03-705-001-N00
2. Latch Test for the Inlet Cowl Pressure Relief Vent
__________________________________________________
A. Equipment
(1)
Adapter - Load Test - Pressure Relief Vent
Latch - B71044-10
B.
Access
(1)
Location Zone
411 Engine 1 - Inlet Cowl
421 Engine 2 - Inlet Cowl
431 Engine 3 - Inlet Cowl
441 Engine 4 - Inlet Cowl
C.
Do the Test of the Latches on the Pressure Relief Vent (Fig. 501).
S 015-012-N00
(1) Open the latches on the pressure relief vent.
(a)
Put the blade of a straight-slot screwdriver into the latch slot (1).
(b)
Move the screwdriver handle to the side to turn the latch (1) to the open position.
S 485-013-N00
(2) Install the load-test-adapter-tool for the latch on the pressure relief vent.
(a) Remove the two latch mounting bolts (3) that are nearest to the edge of the pressure relief vent.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-11-03
ALL ú ú N01 Page 501 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
VENT
VENT COWL
SEE A PANEL
INSIDE
FAN COWL INLET COWL
3. BOLTS WASHERS
LATCH (2 LOCATIONS)
SEE B
INLET COWL
LATCH
PRESSURE RELIEF VENT B
5. PIVOT
FWD SUPPORT
ASSEMBLY
VENT
DOOR FRAME
A
(REF)
2. ADAPTER
5. PIVOT
ASSEMBLY SUPPORT
ASSEMBLY
7. PIVOT BOLT ASSEMBLY 2. ADAPTERTORQUE WRENCH
AND 13/16 SOCKET VENT SIDE (REF) 6. RING PIN
4. ADAPTER BOLTDOOR LATCH WASHER (REF) NUT
(2 LOCATIONS)
C
SEE C STRUCTURE SIDE
6. RING PIN (REF)
B71044-10 LOAD TEST TOOL INSTALLATION
Inlet Cowl Pressure Relief Vent Latch TestFigure 501
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