D.
E.
A
737-300/400/500MAINTENANCE MANUAL
 (4)  
AMM 71-00-00/101, Power Plant

 (5)
WDM 24-21-11, WDM 24-21-21Access

 (1)  
Location Zones 506 Engine 1 - Accessory Gearbox, 8 o'clock 606 Engine 2 - Accessory Gearbox, 8 o'clock 101 Left Control Cabin - P5 overhead panel

 (2)  
Access Panels 5740 CSD Access Door - Engine 1 5840 CSD Access Door - Engine 2

Prepare for the System Load Test.
 S 865-103-002
 (1)  
Supply electrical power to the airplane busses from the APU generator or the external power source (AMM 24-22-00/201).

 S 865-104-002

 (2)  
Start the engine (AMM 71-00-00/201).

 (a) Make sure the applicable DRIVE or LOW OIL PRESSURE No. 1 or 2
 light on the P5-5 panel goes off.Do a test of the VSCF Operation.
 S 865-105-002
 (1)  Push and release the applicable GEN 1 or GEN 2 switch to on.
 (a)  Make sure the applicable GEN OFF BUS No. 1 or 2 light goes off.
 S 865-106-002
 (2)  Put electrical loads on the AC buses.
 (a)  
Use the lights, air conditioning, fuel boost pumps, hydraulic pumps and galley loads.

 (b)  
Apply loads until the applicable generator ammeter No. 1 or 2 on the P5-4 panel shows more than 80 amperes.

 (c)  
Make the frequency meter shows 400 +/- 5 Hz.

 (d)  
Make sure the AC voltmeter shows 115 +/- 5 volts.

 (e)  
Push the DRIVE TEMP switch on the P5-5 panel to IN.

 (f)  
Make sure the IN temperature indication on the applicable GEN DRIVE OIL TEMP meter on the P5-5 panel is less than 135 degrees C.

 NOTE: The usual temperature during operation of the VSCF is
____ less than the CSD. The temperature can be less than 40 degrees C.
 (g)  
Push the DRIVE TEMP switch on the P5-5 to RISE.

 (h)  
Make sure the RISE temperature indication on the applicable GEN DRIVE OIL TEMP No. 1 or 2 meter on the P5-5 panel is less than 20 degrees C.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 VARIABLE SPEED CONSTANT FREQUENCY  ú 24-11-11
 GENERATOR/CONVERTERS  ú CONFIG 2 ú 03 Page 510 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 025-107-002
 (3)  Remove the electrical loads that you have applied (lights, air conditioning, fuel boost pumps, hydraulic pumps and galleys).
 (a)  
Make sure the applicable GEN OFF BUS No. 1 or 2 light comes on.

 (b)  
Make sure the applicable GEN OFF BUS No. 1 or 2 light comes on.

 (c)  
If the APU generator is the ground power source, make sure the APU GEN OFF BUS light goes off.

 S 025-108-002
 (4)  If the VSCF connector D6 or associated wiring (WDM 24-11-11 or WDM 24-11-21) has been disconnected and reconnected, do the following step:
 (a)  Do the Disconnect Test (AMM 24-11-11/501).
 S 865-109-002
 (5)  End of Test
 (a)  
Momentarily push the GRD PWR or the APU GEN No. 1 and 2 switches to ON.

 (b)  
Do a shut down of the engine (AMM 71-00-00/201).

 (c)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 24-11-11-735-064-002
 4. Disconnect Test - Variable Speed Constant Frequency Generator/Converter
_______________________________________________________________________
 NOTE: This is a scheduled maintenance task.
____
 A. General
 (1)  
This test will make sure that the disconnect circuits for the VSCF operate correctly. When you push the DISCONNECT switch, the VSCF disconnects electrically (removes the field current) and the generator continues to turn. When you push the switch on the VSCF to INDICATE, the VSCF connects again.

 B.
References

 (1)  
AMM 24-11-11/401, Variable Speed Constant Frequency
 Generator/Converter

 (2)  
AMM 24-21-00/101, AC Generation System

 (3)  
AMM 24-22-00/201, Manual Control

 (4)  
AMM 71-00-00/201, Power Plant