(2)
Remove breaker terminal cover by removing two flat head screws.
(3)
Install cables on terminal studs in same sequence and position as observed when removed in step B.(3). Observe proper terminal buildup. Tighten nuts on studs to torque values given on terminal cover.
CAUTION: DO NOT OVERTORQUE.
(4)
Connect electrical connector.
NOTE: Use care in joining connectors since bent or damaged pins can result in circuit breaker failure.
(5)
Install breaker terminal cover and tighten two screws.
(6)
Install two access doors on right inner wall of nose wheel well.
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24-21-41 Page 406 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 15/69
GENERATOR ROTATING RECTIFIER - INSPECTION/CHECK
1. General
A. The following procedure checks the generator rotating rectifier and the wiring to generator field terminals. If DS1 light does not indicate as in steps 3.A.(2) and (3), repair wiring to generator field terminals or replace generator.
B. Equipment and Materials
(1)
Rotor Fault Indicator, Part Number 939D192-1 Westinghouse Electric Corp., Aerospace Elec Div. V83843
(2)
Connectors, Part Number 3260, ITT Pomona Electronics Division V24253
2. Prepare for Test
A. Remove electrical power from airplane (24-22-0).
B. Place BAT switch on panel P5 to ON.
C. Set GEN 1, GEN 2, right APU GEN, and left APU GEN switches on panel P5 to OFF.
CAUTION: DO NOT SET GEN 1, GEN 2, AND APU GEN SWITCHES TO ON WHEN ROTOR FAULT INDICATOR IS CONNECTED TO M400 MODULE OR DAMAGE TO ROTOR FAULT INDICATOR MAY RESULT.
D. Provide external electrical power (24-22-0).
E. Start APU (Ref 49-11-0 MP) and Engines No. 1 and 2 (Ref 71-09-100, Operating Procedure). Verify that generators are not providing electrical power (that GCR's are open) by checking that GEN 1, GEN 2, and APU GEN MANUAL TRIP lights on M238 module are illuminated.
NOTE: If manual trip lights are not illuminated, check that external power is off, set applicable GEN switch to OFF, and check that applicable MANUAL TRIP lights are illuminated.
F. Set left switch of power system test module M400 in panel P6 to H and set right switch to 1.
G. Connect connector to each DC jack on M400 module.
H. Clip black lead of rotor fault indicator to DC- connection on M400 module and red lead of rotor fault indicator to DC+ connection on M400 module.
3. Test Generator Rotating Rectifier
A. Test engine No. 1 generator.
(1)
Set left switch on M400 module to A.
(2)
Set S1 on rotor fault indicator to DS1 MUST BE ON and hold in position. Check that DS1 light on rotor fault indicator illuminates.
(3)
Set S1 to DS1 MUST GO OFF and hold in position. Check that DS1 light extinguishes.
NOTE: DS1 light may flash momentarily as S1 is moved from DS1 MUST BE ON to DS1 MUST GO OFF.
(4)
Release S1 and allow switch to return to OFF.
501
May 20/82 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 24-21-61 Page 601
B. Test Engine No. 2 generator.
(1) Set left switch on M400 module to B. Repeat steps A. (2) thru (4).
C. Test APU generator.
(1) Set left switch on M400 module to C. Repeat steps A. (2) thru (4).
4. Return System to Normal
A. Set left switch on M400 module to H.
B. Disconnect rotor fault indicator leads and connectors from M400 module.
C. Shut down APU (Ref 49-11-0) and engines (Ref 71-09-100) if no longer required to be operating.
D. Remove external electrical power if no longer required.
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24-21-61 Page 602 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 20/82
CURRENT TRANSFORMERS - REMOVAL/INSTALLATION
1. General
A. Removal and installation of each current transformer is identical; however, location and access is different. Transformer T1 is on the lower right side of engine; transformer T2 is on the APU near the generator; transformer T4 is in panel P6-11; transformer T5 is in panel P6-12; transformers T7, T8, and T9 are on the right forward ceiling of the electronic compartment.
2. Remove Current Transformers (Fig. 401)
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