(f)  
Install the protection covers on the open ends of the oil
 scavenge tube.

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 (8)  ENGINES WITH PW SB 79-75 AND WITHOUT PW SB 79-76; Disconnect and loosen the oil scavenge tube assembly (LR06) for the No. 4 bearing:
 (a)  
Remove the hose clamp which attaches the tube shield to the bracket on the inboard side of Flange M at approximately the 7 o'clock position (Fig. 510A).

 (b)  
Remove the lockwire and disconnect the tube nut for the oil scavenge hose and tube assembly (LR05) from the tube coupling on the oil scavenge tube (LR06).

 (c)  
Remove the lockwire and disconnect the tube elbow from the internal tube nut on the exhaust case at approximately the 10 o'clock position (Fig. 510, View A).

 (d)  
Remove the bolts, nuts and clamps which attach the oil scavenge tube (LR06) to the Flange N and P brackets (Fig. 510, Views C, D, E, F and G).

 (e)  
Remove the oil scavenge tube (LR06) from the engine.

 (f)  
Install the protection covers on all openings.

 (g)  
Remove the bolts, nuts and clamp bracket attached to the Flange M and N brackets at approximately the 7 o'clock position.

 S 035-248-N00
 (9)  ENGINES WITH PW SB 79-76; Disconnect and loosen the oil scavenge tube assemblies (LR21) and (LR22) for the No. 4 bearing:
 (a)  Remove the clamps and the spray shields at the connection for the oil scavenge tubes (LR21) and (LR22), and at the connection for the oil scavenge tubes (LR05) and (LR21) (Fig. 510B, Views B and I).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
OIL SCAVENGE SEE A TUBE (LR06)
FWD
A A
SPRAY SHIELD
SEE B
HOSE CLAMP
OIL SCAVENGE TUBE (LR05)
(VIEW LOOKING UP)
A

B
FLANGE M BRACKET
BOLT
(2 LOCATIONS)

LOOP CLAMP BRACKET
BOLT
CLAMP
OIL SCAVENGE
TUBE (LR06)
A-A  L-B2531 (0000)
Test 12 - Engines with PW SB 79-75 and without PW SB 79-76
Figure 510A

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE  A  SEE  B  SEE  C  SEE  D  TUBE (LR22) OIL SCAVENGE 
SEE  L  SEE  E 
SEE SEE  K J  SEE  F 
SEE  G 
SEE  I TUBE (LR21) OIL SCAVENGE SEE  H 
Figure 510B (Sheet 1) Test 12 - Engine with PW SB 79-76 A L-B2783 (0000) 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
OIL SCAVENGE
TUBE (LR22)

BOLT
OIL SCAVENGE TUBE (LR22) CLAMP
CLAMP
NUT FWD
SPRAY
SHIELD

FWD
OIL SCAVENGE BOLTTUBE (LR21)
(EXAMPLE, 2 LOCATIONS)
C B
BOLT
OIL SCAVENGE TUBE (LR22)
OIL SCAVENGE TUBE (LR22) FWD
CLAMP CLAMPCLAMP FWDFWD
D  BOLT
BOLT
OIL SCAVENGE
F
TUBE (LR22)
(EXAMPLE, 2 LOCATIONS)
L-B2784 (0000)
E
L-B2785 (0000)
Test 12 - Engines with PW SB 79-76
Figure 510B (Sheet 2)

G86251
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