Startup

Pneumatic Start

  1. Starter and Ignition Button—PRESS momentarily

  2. Ground air supply—APPLY

    Caution

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

    Caution

    If the tachometer doesn't indicate engine rotation, or the oil pressure doesn't indicate a rise in oil pressure within 10 seconds after air is applied, stop the starter cycle by pressing the stop button momentarily.

  3. Throttle—IDLE at 12–16% RPM. Check ignition indicator light is on, fuel flow is indicated, and confirm the fuel BOOST PUMP INOP light is extinguished.

    Caution

    If the fuel BOOST PUMP INOP light remains on, the boost pump has failed. Abort the flight. If ignition does not occur within 20 seconds after throttle is moved to IDLE, return throttle to OFF and continue to motor the engine for 30 seconds, then press the stop button momentarily to abort the start. If an exhaust overtemperature didn't occur, subsequent starts can be attempted.

  4. Exhaust temperature—CHECK—Light-up should occur within 20 seconds after the throttle is moved to IDLE, indicated by rising exhaust gas temperature.

    Caution

    If exhaust temperature exceeds start limits, return throttle to the OFF position, and monitor the engine for 30 seconds. Then, press the stop button momentarily to abort the start.

  5. 40-45% RPM—DISCONNECT AIR SUPPLY AND GROUND POWER

    Caution

    If the engine doesn't accelerate to 55–60% (idle) RPM within 1 minute (80 seconds is permissible on the first start of the day) after light-up, return throttle to the OFF position and continue to motor the engine for 30 seconds; then press the starter and ignition STOP button momentarily to abort the start. Unless an exhaust overtemperature occurred, subsequent starts can be attempted.

  6. Engine Idle—CHECK ENGINE INSTRUMENTS—confirm:

    • Engine RPM is 55–60%
    • Oil pressure is 40 psi
    • Other engine instruments indicate properly

    Caution

    If the ignition-on light fails to extinguish at idle, the starter centrifugal cutout switch has failed. Press the stop button momentarily to shut down the starter and de-energize the ignition circuit.

Cartridge Start

Note

The minimum interval between cartridge starts is 5 minutes, to a maximum of two such attempts per hour. Perform one pneumatic start for every four cartridge starts to ensure removal of cartridge residue from the starter.

Caution

If external DC power isn't available, set the UHF radio switch mode selector in the OFF position until startup is complete.

  1. Starter and ignition button—PRESS MOMENTARILY

    Caution

    If the tachometer doesn't indicate engine rotation, or the oil pressure doesn't indicate a rise in oil pressure within 10 seconds after air is applied, stop the starter cycle by pressing the stop button momentarily.

  2. Throttle—IDLE at 2–4% RPM. Check ignition indicator light-on, fuel flow is indicated, and confirm the fuel BOOST PUMP INOP light is extinguished.

    Warning

    If the fuel BOOST PUMP INOP light remains on, the DC boost pump has failed. Abort the flight.

  3. Exhaust Gas Temperature—CHECK—Light-up should occur (as indicated by rising exhaust temperature) within 8–10 seconds after the starter and ignition button is pressed.

    Note

    Cartridge burnout time is approximately 20 seconds.

    Caution

    If the engine doesn't accelerate to 55–60% (idle) RPM within 1 minute (80 seconds is permissible on the first start of the day) after light-up, return throttle to the OFF position and continue to motor the engine for 30 seconds; then press the starter and ignition STOP button momentarily to abort the start. Unless an exhaust overtemperature occurred, subsequent starts can be attempted.

    Caution

    If the ignition-on light fails to extinguish at idle, the starter centrifugal cutout switch has failed. Press the stop button momentarily to shut down the starter and de-energize the ignition circuit.

  4. Engine Idle—CHECK ENGINE INSTRUMENTS—confirm:

    • Engine RPM is 55–60%
    • Oil pressure is 40 psi
    • Other engine instruments indicate properly