KEYWASHER
NUT
B
WASHER
WASHER
(2 LOCATIONS)
BOLT
DRILLED (2 LOCATIONS)
BOLT
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 5)
M46890
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. POST PW-SB-73-88 AND POST-PW-SB 72-182 ú
73-21-06
ú ú N03 Page 406 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(c)
6G16 SCU ALT PWR ENG 2
(d)
6G24 ENG SCU 2
(e)
6G17 SCU ALT PWR ENG 3
(f)
6G25 ENG SCU 3
(g)
6G18 SCU ALT PWR ENG 4
(h)
6G26 ENG SCU 4
S 014-070-N00
(2) Open the right fan cowl panel (AMM 71-11-04/201).
S 044-069-N00
WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(3) Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).
INTERMEDIATE CASE
L-A4700
EEC Speed Transducer (N1) Installation Figure 401 (Sheet 6)
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73-21-06
ALL ú ú N03 Page 407 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 014-071-N00
(4) Open the right core cowl panel (AMM 71-11-06/201).
S 014-073-N00
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(5)
Open the right thrust reverser (AMM 78-31-00/201).
D.
Procedure
S 014-004-N00
(1)
Remove the No. 3 segment of the fan exit liner (AMM 72-34-03/401).
S 014-005-N00
(2)
Remove the air supply tube.
(a)
Remove the bolts which attach the tube flange to the intermediate case boss.
(b)
Remove the bolts and nuts which attach the tube flange, at the aft end, to the flange for the cooling air manifold.
(c)
Remove the air supply tube.
(d)
Install a protection cap on the open cooling air manifold and the intermediate case boss.
S 024-076-N00
(3)
Remove the EEC speed transducer (N1):
(a)
Disconnect the electrical connectors from the EEC speed transducer (N1). 1) Install the protection caps on the electrical connectors.
(b)
Disconnect the tube nuts for the PT2.5 sensing manifold from the EEC speed transducer and the sensing line.
(c)
Remove the PT2.5 sensing manifold.
1) Install the protection cap on the open end of the sensing line and the port of the EEC speed transducer.
(d)
Remove the EEC speed transducer with the steps that follow:
1) Equally remove bolts and nut which attach the EEC speed transducer to the intermediate case.
NOTE:____The EEC speed transducer has a spring in it. Loosen the bolts and nut equally (not one at a time).
2) Remove the washers.
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