ELECTRICAL POWER - DDG MAINTENANCE PROCEDURES
1. General
A. This procedure has maintenance tasks for the Master Minimum Equipment List (MMEL)
maintenance requirements as shown in the Dispatch Deviations Procedures Guide (DDPG). These
tasks are used to prepare the airplane for flight with certain systems/components inoperative.
B. This procedure also has the tasks that put the airplane back to its usual condition.
C. These are the tasks for the components in the electrical power system:
(1) MMEL 24-1 (DDPG) Preparation - Engine Driven Generator Systems (IDG) Inoperative
(2) MMEL 24-1 (DDPG) Restoration - Engine Driven Generator Systems (IDG) Inoperative
TASK 24-00-00-040-801
2. MMEL 24-1 (DDPG) Preparation - Engine Driven Generator Systems (IDG) Inoperative
A. General
(1) This task gives the maintenance steps which prepare the airplane for flight with one of the
Engine Driven Generator Systems (IDG) Inoperative.
B. References
Reference Title
12-13-21-200-801 IDG Oil Level Check (P/B 301)
24-22-00-860-812 Remove Electrical Power (P/B 201)
24-22-00-860-813 Supply External Power (P/B 201)
71-00-00-700-819-F00 Stop the Engine Procedure (Usual Engine Stop) (P/B 201)
71-00-00-800-807-F00 Start the Engine Procedure (Selection) (P/B 201)
C. Location Zones
Zone Area
211 Flight Compartment - Left
212 Flight Compartment - Right
411 Engine 1 - Engine
421 Engine 2 - Engine
D. Integrated Drive Generator (IDG) Deactivation
SUBTASK 24-00-00-040-001
(1) If the IDG is not disconnected, disconnect the IDG per the steps that follow:
(a) Do this task: IDG Oil Level Check, TASK 12-13-21-200-801.
NOTE: The IDG may be operated without oil for up to 50 hours in the disconnected
mode.
(b) If the engine operates with the IDG disconnected for more than 50 hours, the IDG input
shaft ball bearing assembly must be removed and examined for worn areas.
(c) Do this task: Supply External Power, TASK 24-22-00-860-813.
(d) Start the applicable engine. To start the engine, do this task: Start the Engine Procedure
(Selection), TASK 71-00-00-800-807-F00.
NOTE: The DRIVE light should go off when the engine reaches idle speed.
(e) Set the AC meter selector switch on the P5-13 panel to the applicable GEN position.
(f) Lift the applicable DISCONNECT switch guard on the P5-5 panel.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-00-00
Page 901
D633A101-ILF Jun 15/2015
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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