B.
Consumable Materials
(1)
B00448 Solvent - 1,1,1 Trichloroethane Inhibited, MIL-T-81533
(2)
D00390 Oil - Engine
C.
References
(1)
AMM 71-00-00/501, Power Plant
(2)
AMM 71-11-06/201, Core Cowl Panels
D.
Access
(1)
Location Zone 412 Engine 1 - Turbine Exhaust Case 5 o'clock 422 Engine 2 - Turbine Exhaust Case 5 o'clock 432 Engine 3 - Turbine Exhaust Case 5 o'clock 442 Engine 4 - Turbine Exhaust Case 5 o'clock
(2)
Access Panel
418 Right Core Cowl Panel - Engine 1
428 Right Core Cowl Panel - Engine 2
438 Right Core Cowl Panel - Engine 3
448 Right Core Cowl Panel - Engine 4
E.
Procedure
S 867-002-N00
(1) For the applicable engine, open this circuit breaker and install a DO-NOT-CLOSE tag:
(a) P414 Main Power Distribution Panel
1) 414D21 EEC GND TEST ENG 1
2) 414D22 EEC GND TEST ENG 2
3) 414D23 EEC GND TEST ENG 3
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
FLANGE P
FLANGE S
FLANGE T
SEE A
TURBINE EXHAUST CASE
EGT (TT4.95) THERMOCOUPLE CABLE
SEE B EGT (TT4.95) THERMOCOUPLE CABLE TERMINAL BOX EEC HARNESS GROUND LEAD (2 LOCATIONS) NUT - ALUMEL STUD (2 LOCATIONS) NUT - CHROMEL STUD
FWD A (2 LOCATIONS) SCREW GROUND TERMINAL
COVER
STUD (4 LOCATIONS) EGT (TT4.95) THERMOCOUPLE CABLE TERMINAL
FLANGE P BRACKET (2 LOCATIONS) (2 LOCATIONS) SCREW SCREW
EGT (TT4.95) THERMOCOUPLE CABLE TERMINAL BOX RIGHT EGT (TT4.95) THERMOCOUPLE CABLE HALF OUTER CLAMP HALF
INNER CLAMP HALF B THERMOCOUPLE CABLE HALF LEFT EGT (TT4.95)
L-A3849 Exhaust Gas Temperature (TT4.95) Thermocouple Cable Terminal Box Cleaning
Figure 701
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
4) 414D24 EEC GND TEST ENG 4
(2) S 017-003-N00Open the right core cowl panel (AMM 71-11-06/201).
(3) S 037-004-N00Remove the screws that attach the terminal box cover, the ground lead for the EEC harness, and the inner and outer clamp halves.
(4) S 037-014-N00Remove the cover and the clamps from the engine.
(5) S 037-015-N00Disconnect the EGT thermocouple cable and the EEC harness: (a) Remove the nuts that attach the electrical leads to the terminal studs. (b) Remove the EGT harness leads from the terminal studs.
(6) S 117-016-N00Clean the terminal box, the terminal box cover, and the clamps. (a) Put solvent on a cloth. (b) Clean the terminal box cover and the clamp halves with the cloth. (c) Clean the outer surfaces of the terminal box with the cloth. (d) Remove the unwanted material with compressed air at 30 psi (207 kPa) maximum.
(7) S 437-017-N00Connect the EGT thermocouple cables and the EEC harness: (a) Install the EGT harness leads of the left EGT thermocouple cable on the terminal studs. (b) Install the EGT harness leads of the right EGT thermocouple cable on the terminal studs. (c) Install the EGT harness leads of the EEC harness on the terminal studs.
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