(g)
Remove the bolts, nuts, and clamps which attach the center section of the oil pressure tube to the brackets on Flanges M, N, and P.
(h)
Remove the bolt, nut, spacer and clamp which attach the center section of the oil pressure tube to the oil scavenge tube for the No. 4 bearing.
(i)
Remove the center section of the oil pressure tube from the engine.
(j)
Install the protection caps.
S 014-107-N00
(4)
ENGINES POST-PW-SB 79-76; Remove the oil pressure tube for the No. 4 bearing with the steps that follow:
(a)
Remove clamps which attach the spray shield at the tube nut forward of Flange M.
(b)
Remove the spray shield from the engine.
(c)
Disconnect the tube nut forward of Flange M from the tube adapter.
(d)
Remove the clamps which attach the spray shield at the tube nut aft of Flange N.
(e)
Remove the spray shield from the engine.
(f)
Disconnect the tube nut, between the upper and lower sections of the oil pressure tube, aft of Flange N.
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SEE A
LPT BRIDGE NO. 4 BEARING
BRACKET SCAVENGE TUBE
(6 LOCATIONS) FLANGE
TUBE -P-
TUBE CLAMP
CLAMP
FLANGE -N-FLANGE -M-SEE C TUBE
CLAMP
TUBE CLAMP
TUBE NUT WITH SPRAY TUBE NUT
SHIELD WITH SPRAY
SHIELD
TUBE
CLAMP
CLAMP
TUBE NUT PT4.95
PRESSURE
TUBE
TUBE NUT
NO. 3 BEARING OIL VENT TUBE
OIL STRAINER
SEE B
TUBE CLAMP
NO. 4 BEARING TUBE CLAMP
VENT TUBE
A
AIRPLANES WITH PW SB 79-75 AND SB 79-76
L-B2781 (0000)
Turbine case Cooling (TCC) HPT Manifold Installation Figure 402 (Sheet 1)
G79862
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
PT4.95 PRESSURE TUBE
B
AIRPLANES WITH PW SB 79-75 AND SB 79-76
L-B2793 (0000)
Turbine Case Cooling (TCC) HPT Manifold Installation
Figure 402 (Sheet 2)
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G79863G79866
NO. 4 BEARING SCAVENGE TUBE (REF) FLANGE M NO. 4 BEARING SCAVENGE TUBE
FWD SHIELD TUBE
SEE D A A
CLAMP HOSE
VIEW LOOKING UP C
D
CASE FLANGE M BRACKET
BOLT (2 LOCATIONS) LOOP CLAMP BRACKET
NO. 4 BEARING SCAVENGE TUBE BOLT CLAMP
AIRPLANES WITH PW SB 79-75 AND SB 79-76 A-A L-B2531 (0000)
Turbine Case Cooling (TCC) HPT Manifold Installation Figure 402 (Sheet 3)
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(g)
Remove the tube clamps which attach the upper section of the oil pressure tube to the brackets at Flanges M and N.
(h) 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 大氣 AIR 1(79)
