Preliminary Requirements

Procedure

1. Normal Engine Shutdown

   1. A shutdown which lets the engine become cool at idle before the shutdown is a normal shutdown.

   2. If the engine was operated above an EPR 1.331 before engine shutdown, operate the engine at APPROACH IDLE for twice the time that you operated the engine above 1.331 EPR (cumulative time since the previous start) or for 15 minutes, whichever is less. The time at MIN IDLE must never be less than five minutes before an engine shutdown.

2. Procedure After a Normal Engine Shutdown

   1. If the engine was shutdown for less than ten hours, carry out the following procedure. Do a dry motor operation of two minutes followed by a shutdown. Start the engine after two minutes of shutdown. Refer to TASK 71-00-00-700-053-A01 (TESTING-000, CONFIG-001) and TASK 71-00-00-700-053-A02 (TESTING-000, CONFIG-001).

   2. If the engine was shutdown for more than ten hours, motor the engine with the starter for a minimum of two minutes. Check the oil level after the rotor stops. Fill the oil tank as necessary. Refer to TASKS 71-00-00-700-064-A00 (TESTING-000, CONFIG-001)

3. Emergency Shutdown

   1. An emergency shutdown is a shutdown from power levels higher than MIN IDLE and the engine was not cooled down at IDLE first.

4. Procedure After an Emergency Shutdown

   1. Do the steps that follow for engines that will be started again in less than 15 minutes of the last engine shutdown:

      1. Immediately after FUEL OFF mode, engage the starter at less than 1490 RPM (10 percent) to continue the rotation of the engine.

      2. Motor the engine at more than 2500 N2 RPM until the EGT decreases below 482 deg F (250 deg C) or for two minutes, whichever is reached first.

      3. Start the engine again in less than 15 minutes by the instructions given in Normal Engine Automatic Start Procedure or Normal Engine Manual Start Procedure. Refer to TASK 71-00-00-700-053-A01 (TESTING-000, CONFIG-001) or TASK 71-00-00-700-053-A02 (TESTING-000, CONFIG-001).

      4. Keep the power at MIN IDLE for 15 minutes before you move the thrust lever forward. You can continue normal operation after 15 minutes after MIN IDLE.

   2. Do the steps that follow for engines that will be started again 15 minutes or more after the last engine shutdown.

      1. Start the engine again after six hours from the last engine shutdown or turn the HP compressor as follows:

         1. Turn the HP compressor (use the gearbox crank pad and a torque wrench) 180 degrees each half hour for up to a maximum of six hours. Do not apply more than 500 lbfin (56.5 Nm) of torque. One-third turn clockwise (as seen from the front of the gearbox) on the gearbox crank pad is equal to 180 degrees of rotor rotation. Refer to Figure.

      2. If the conditions that follow are met, you can start the engine again by the instructions given in Normal Engine Automatic Start Procedure or Normal Engine Manual Start Procedure. Refer to TASK 71-00-00-700-053-A01 (TESTING-000, CONFIG-001) or TASK 71-00-00-700-053-A02 (TESTING-000, CONFIG-001).

         1. If the rotor is free (less than 500 lbf.in (56.5 Nm) of torque is necessary to turn the rotor 360 degrees).

         2. You start the engine again between 10 and 20 minutes after the last manual rotor turn.

         3. Before you start the engine, do two consecutive dry motor operations of two minutes each with a wait period of five minutes between motors.

      3. If the rotor cannot be turned (more than 500 lbf.in (56.5 Nm) of torque is necessary), do the steps that follow:

         1. Try to turn the rotor each one-half hour until the rotor is free.

         2. Turn the HP compressor 180 degrees (one-third turn clockwise as viewed from the front of the gearbox).

         3. Before you start the engine, do two consecutive dry motor operations of two minutes each with a wait period of five minutes between motors.

         4. Start the engine again one hour after the last manual rotor turn by the instructions given in Normal Automatic Engine Start Procedure or Normal Manual Engine Start Procedure. Refer to TASK 71-00-00-700-053-A01 (TESTING-000, CONFIG-001) or TASK 71-00-00-700-053-A02 (TESTING-000, CONFIG-001).

      4. Operate the engine at MIN IDLE for a minimum of 15 minutes before you accelerate.

Figure: Gearbox crank pad location

Gearbox crank pad location