5.0
(127.0)
6.0
(152.4)
6.5
(165.1)
7.0
(177.8)
DIMENSION A
INCHES (mm) MAX
0.16 (4.06)
0.27 (6.86)
0.30 (7.62)
0.37 (9.40)
0.40 (10.16)
0.43 (10.92)
TABLE A
SINGLE GLAND SEAL (P/N 60B40145-X) (PRE-747-SL-36-047-E)
A1
Pneumatic Duct Joint Installations
Figure 402 (Sheet 2)
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ALL ú ú 01 Page 406 ú Jun 18/01
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B50977
A
747-400
MAINTENANCE MANUAL
Pneumatic Duct Joint Installations
Figure 402 (Sheet 3)
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B51000
A 747-400 MAINTENANCE MANUAL
BEARING
REPLACE DUCT SECTION (BALL JOINT) IF ANY OF THE MEASUREMENTS ARE LESS THAN t
MIN
(AMM 36-11-01/401).
REPLACE DUCT SECTION (BALL JOINT) (AMM 36-11-01/401) IF THE GAP (BETWEEN THE BEARING NUT AND THE RETAINER FLANGE) IS LESS THAN 0.003 INCH (0.076 mm) WHEN THE JOINT IS ASSEMBLED AND TIGHTENED TO 20 FEET-POUNDS (27.1164 Nm).
Pneumatic Duct Joint Installations
Figure 402 (Sheet 4)
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ú 02 Page 408
ú Oct 18/01
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E21975
A
747-400 MAINTENANCE MANUAL
S 424-012
(4)
Put the duct into the duct sleeve slowly.
S 424-045
(5)
Tighten the clamps on the duct section.
S 434-052
(6)
Tighten the clamps on the adjacent duct section.
S 424-046
(7)
Install the duct support equipment that was removed.
TASK 36-11-01-004-013
4. Duct Section with a Ball Joint Removal (Fig. 402)
______________________________________
A. References
(1)
AMM 36-00-00/201, Pneumatic System
(2)
AMM 71-11-04/201, Fan Cowl Panels
(3)
AMM 71-11-06/201, Core Cowl Panels
(4)
AMM 78-31-00/201, Thrust Reverser System
B.
Prepare to Remove the Duct Ball Joint
S 864-167
(1) Release the pressure from the pneumatic system (AMM 36-00-00/201).
S 044-163
WARNING: DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE
_______ THRUST REVERSER. ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).
(3)
Open the left fan cowl panel (AMM 71-11-04/201).
S 014-164
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A
747-400 MAINTENANCE MANUAL
S 014-165
(4) Open the left core cowl panel (AMM 71-11-06/201).
S 014-166
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(5) Open the left thrust reverser (AMM 78-31-00/201).
C. Remove the Duct Ball Joint
S 024-168
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