C. Procedure
S 865-055-C00
(1)
Operate the engines (AMM 71-00-00/201).
S 215-054-C00
(2)
Make sure the N1 indicators show approximately the same N1% when the N2 indicators show the same N2%.
S 865-056-C00
(3)
Stop the engines (AMM 71-00-00/201).
TASK 77-12-00-735-001-C00
3. System Test - N1 Tachometer System
__________________________________
A. Special Tools and Equipment
(1) C77002-20 Tachometer System Test Box
B. Standard Tools and Equipment
(1) Function generator -Gives approximately a 5 V square or sine wave, and adjusts from 50 Hz to 3000 Hz Wavetek Model 21 Synthesizer/Function Generator or equivalent.
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(2) Multimeter - Dana 4003 Digital or equivalent
C. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 71-11-02/201, Fan Cowl Panels
D. Access
(1)
Location Zone
101 Control Cabin - Left
102 Control Cabin - Right
503 Left Engine . Fan Frame 4 o'clock
603 Right Engine . Fan Frame 4 o'clock
(2)
Access Panel 5737L Right Fan Cowl Panel . Left Engine 5837R Right Fan Cowl Panel . Right Engine
E. Prepare to do the System Test (Fig. 501)
S 865-002-C00
(1) AIRPLANES WITHOUT EIS; For the applicable engine, open these circuit breakers:
(a) P6 Main Power Distribution Panel
1) C00732 TACH IND ENG 1 N1
2) C00733 TACH IND ENG 2 N1
S 865-004-C00
(2)
AIRPLANES WITH EIS; For the applicable engine, open these circuit breakers:
(a) P6 Main Power Distribution Panel 1) C01182 EIS PRIMARY 1 (Engine 1) 2) C01184 EIS PRIMARY 2 (Engine 1) 3) C01183 EIS PRIMARY 3 (Engine 2) 4) C01185 EIS PRIMARY 4 (Engine 2)
(3)
Open the right fan cowl panel (AMM 71-11-02/201).
S 015-006-C00
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N1 SPEED SENSOR
SEE A
ELECTRICAL CONNECTOR N1 SPEED (D546) SENSOR
A
Test of the N1 Speed Sensor
Figure 501
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