(1)
Location Zone 412 Engine 1 - Intermediate Case 5 o'clock 422 Engine 2 - Intermediate Case 5 o'clock 432 Engine 3 - Intermediate Case 5 o'clock 442 Engine 4 - Intermediate Case 5 o'clock
(2)
Access Panel 416 Right Thrust Reverser Half - Engine 1 426 Right Thrust Reverser Half - Engine 2 436 Right Thrust Reverser Half - Engine 3 446 Right Thrust Reverser Half - Engine 4
C.
Prepare to Remove the EEC Speed Transducer (N1)
S 864-038-N00
(1)
For the applicable engine, open this circuit breaker on the main power distribution panel, P6, and install the DO-NOT-CLOSE tag:
(a)
6G15 SCU ALT PWR ENG 1
(b)
6G23 ENG SCU 1
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73-21-06
ALL ú ú N03 Page 401 ú Oct 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE A
INTERMEDIATE CASE
2.9 BLEED VALVE SOLENOID (REF)
ELECTRICAL CONNECTOR FWD
EEC SPEED TRANSDUCER (N1) SEE B
PT2.5 SENSING MANIFOLD SEE C
A
EEC Speed Transducer (N1) Installation Figure 401 (Sheet 1)
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73-21-06
ALL ú ú N03 Page 402 ú Oct 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
PACKING
A PACKING
EEC SPEED
TRANSDUCER (N1)
M3104
WASHER
DRILLED B
BOLT
WASHER
(3 LOCATIONS)
BOLT
(3 LOCATIONS)
0.020-0.050 INCH (0.51-1.27 mm)
INNER
BRACKET
SHIM
SHOULDER
FWD
EEC SPEED
TRANSDUCER
SECTION THROUGH THE END OF THE EEC
SPEED TRANSDUCER AS INSTALLED
A-A
EEC Speed Transducer (N1) Installation Figure 401 (Sheet 2)
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PRE-PW-SB 73-88, POST-PW-SB 72-182 ú 73-21-06
ú ú N04 Page 403 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
A
PACKING
A
PACKING
EEC SPEED
TRANSDUCER (N1)
M3104
B
WASHER
(4 LOCATIONS)
BOLT
(4 LOCATIONS)
0.020-0.050 INCH (0.51-1.27 mm)
INNER
BRACKET
SHIM
SHOULDER
FWD
EEC SPEED
TRANSDUCER
SECTION THROUGH THE END OF THE EEC
SPEED TRANSDUCER AS INSTALLED
A-A
EEC Speed Transducer (N1) Installation Figure 401 (Sheet 3)
M46836
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73-21-06
ú ú NGUN Page 404 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
STUD LOCATING A PACKING PACKING
EEC SPEED M3104 TRANSDUCER (N1) KEYWASHER NUT
(3 LOCATIONS) WASHER B
(3 LOCATIONS) BOLT
(0.51-1.27 mm) 0.020-0.050 INCH
BRACKET INNER SHOULDER TRANSDUCER EEC SPEED SHIM FWD
SPEED TRANSDUCER AS INSTALLED SECTION THROUGH THE END OF THE EEC A-A
Figure 401 (Sheet 4) EEC Speed Transducer (N1) Installation
M46879
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