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AIRBORNE AUXILIARY POWER – DDG MAINTENANCE PROCEDURES

1 . General
A. This procedure has the maintenance tasks for the Master Minimum Equipment List (MMEL) maintenance requirements as shown in the Dispatch Deviations Procedures Guide (DDG). These tasks prepare the airplane for flight with systems/components that are inoperative.
B. This procedure also has the tasks that put the airplane back to its usual condition.
C. These are the tasks for the systems/components in the airborne auxiliary power system:
(1) MMEL 49-1 (DDPG) Preparation – APU Inoperative
(2) MMEL 49-1 (DDPG) Restoration – APU Inoperative
(3) MMEL 49-2 (DDPG) Preparation – APU Annunciator LOW OIL PRESSURE or
OVER SPEED Light Inoperative
(4) MMEL 49-2 (DDPG) Restoration – APU Annunciator LOW OIL PRESSURE or
OVER SPEED Light Inoperative
(5) MMEL 49-4 (DDPG) Preparation – APU Annunciator MAINT Light On or Inoperative
(6) MMEL 49-4 (DDPG) Restoration – APU Annunciator MAINT Light On or Inoperative
(7) MMEL 49-5 (DDPG) Preparation – APU Exhaust Gas Temperature Indicator Inoperative
(8) MMEL 49-5 (DDPG) Restoration – APU Exhaust Gas Temperature Indicator Inoperative
(9) MMEL 49-6 (DDPG) Preparation – APU Air Inlet Door Inoperative
(10) MMEL 49-6 (DDPG) Restoration – APU Air Inlet Door Inoperative
(11) MMEL 49-7 (DDPG) Preparation – APU Bleed Air System Inoperative
(12) MMEL 49-7 (DDPG) Restoration – APU Bleed Air System Inoperative
(13) MMEL 49-12 (DDPG) Preparation – APU Annunciator FAULT Light Inoperative
(14) MMEL 49-12 (DDPG) Restoration – APU Annunciator FAULT Light Inoperative
(15) MMEL 49-15 (DDPG) Preparation – Start Power Unit Inoperative
(16) MMEL 49-15 (DDPG) Restoration – Start Power Unit Inoperative
(17) MMEL 49-16 (DDPG) Preparation – Start Converter Unit Inoperative
(18) MMEL 49-16 (DDPG) Restoration – Start Converter Unit Inoperative TASK 49-00-00-040-801
2 . MMEL 49-1 (DDPG) Preparation – APU Inoperative (Fig. 901)
A. General
(1) This task gives the steps to prepare the airplane for flight with the APU inoperative. To prepare the airplane for flight with the APU inoperative, you must deactivate the APU master switch and do a visual check of the APU fuel shutoff valve.
(2) If the APU INOP tag is installed because of an APU start problem and there are other APU starts on the ground, you must do a visual inspection of the tailcone and flight control surfaces.