Startup

Pneumatic Start

  1. Starter and ignition button - Press momentarily.

  2. External air - APPLY.

    Caution

    The starter is limited to one minute of continuous operation during any 5-minute period.

    Caution

    If there is no tachometer indication of engine rotation or rise in oil pressure within 10 seconds after air is applied, stop the starter cycle by pressing the starter and ignition stop button.

  3. Throttle - IDLE at 12% to 16% rpm. Check ignition indicator light is on, a fuel flow indication and fuel boost pump inop light out.

    Caution

    If the fuel boost pump inop light remains on, the de boost pump has failed. Abort the flight. If ignition does not occur within 20 seconds after throttle is advanced to IDLE, return throttle to OFF and continue to motor the engine for 30 seconds; then press starter and ignition STOP button momentarily to abort the start. Except for exhaust overtemperature, subsequent starts may be attempted.

  4. Exhaust temperature — Check. Light-up should occur (as indicated by rising exhaust temperature) within 20 seconds after the throttle is moved to IDLE. If exhaust temperature exceeds start limits, return throttle to OFF and continue to motor the engine for 30 seconds; then press the starter and ignition STOP button momentarily to abort the start.

  5. 40% to 45% rpm — Have external air power reduced and disconnected; dc external power disconnected.

    Caution

    If the engine fails to accelerate to 55% to 60% (idle) rpm within 1 minute (80 seconds is permissible on the first start of the day) after light-up, return throttle to OFF and continue to motor the engine for 30 seconds; then press the starter and ignition STOP button momentarily to abort the start. Except for exhaust overtemperature, subsequent starts may be attempted.

  6. Idle rpm — Engine instruments checked. Engine rpm should increase steadily, with the throttle at IDLE, to 55% to 60%, and oil pressure should increase steadily to a minimum of 40 psi; then check all engine instruments for proper indication.

    Caution

    If the ignition-on light fails to go out after idle rpm is obtained, the starter centrifugal cutout switch has failed and the starter and ignition STOP button must be pressed momentarily to shut down the starter and de-energize the ignition circuit.

Cartridge Start

Note

The minimum interval between cartridge starts is 5 minutes; however, no more than two cartridge starts can be made in any 60-minute period, regardless of the interval between starts. Perform one pneumatic start for every four cartridge starts to assist in removing cartridge residue from the starter.

Note

If external dc power is not available, place radio switch at OFF until start is completed.

  1. Starter and ignition button — Press momentarily.

    Caution

    If there is no tachometer indication of engine rotation or rise in oil pressure within 10 seconds after starter and ignition button is pressed, stop the starting cycle (ignition) by pressing the starter and ignition STOP button momentarily.

  2. Throttle — IDLE at 2% to 4% rpm. Check ignition indicator light-on, a fuel flow indication and fuel boost pump inop light-out.

    Caution

    If the fuel boost pump inop light remains on, the DC boost pump has failed. Abort the flight.

  3. Exhaust temperature — Check. Light-up should occur (as indicated by rising exhaust temperature) within 8 to 10 seconds after the starter and ignition button is pressed. (Cartridge burnout time is approximately 18 to 20 seconds.)

    Caution

    If engine fails to accelerate to 55% to 60% (idle) rpm within 1 minute after light-up, or if exhaust temperature exceeds start limits, return throttle to OFF and allow engine to unwind; then press starter and ignition STOP button to abort start. Except for exhaust overtemperature, another start may be attempted.

    Caution

    If the ignition-on light fails to go out after idle rpm is obtained, the starter centrifugal cutout switch has failed and the starter and ignition STOP button must be pressed momentarily to shut down the starter and de-energize the ignition circuit.

  4. Idle rpm — Engine instruments checked. Engine rpm should increase steadily, with the throttle at IDLE, 55% to 60%, and oil pressure should increase steadily to a minimum of 40 psi; then check all engine instruments for proper indication.