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CONDITIONS: In an OH-58D helicopter with performance planning informa­tion available.

  • STANDARDS: Appropriate common standards plus the following:


    1. Perform the hover power check near the takeoff point and in the direction of takeoff.

    2. Maintain a stabilized 3 foot hover, ±1 foot, and deter­mine that sufficient power is available to complete the mis­sion.
  • DESCRIPTION:


    1. Crew actions.

          1. The PC will determine if the aircraft is capable of completing the assigned mission and ensure that aircraft limita­tions will not be exceeded.

          2. The P* will remain primarily focused outside the aircraft to maintain clearance and announce when the aircraft is stabilized at the appropri­ate hover height.

          3. The P will monitor the aircraft instruments. He will announce hover torque and maximum torque available and alert the P* of the difference. The P will announce when the power check is complete.

    2. Procedure. While near the intended takeoff point and in the direc­tion of takeoff; establish the aircraft at a stabilized 3‑foot hover. Compare the actual mast torque required to hover with the predicted maximum torque available. Depending on the torque differential, the following takeoff and landing restrictions apply:

          1. Less than 5 percent torque differential. Ensure that adequate room exists for takeoff with minimum or existing power. The destination must allow a normal or shallower-than-normal approach to landing areas with a surface which will permit a descent to the ground if necessary.

          2. 5 - 9 percent torque differential. Steep approaches, Confined area, and Mountain/Pinnacle/Ridgeline operations shall not be performed.

          3. 10 to 14 percent torque differential. An OGE hover power check may be attempted, and if successfully completed, takeoff and landing restrictions do not apply.

          4. 15 percent or more torque differential. Takeoff and landing restrictions do not apply.

          5. The Aircrew will not attempt the tasks or task elements listed below when the torque differential is less than 15 percent unless an OGE hover power check is successfully completed.

        1. Task 1038 Perform hovering flight (OGE).

        2. Task 1040, Perform VMC takeoff (Confined area, mountain/pinnacle/ridgeline).

        3. Task 1058 Perform VMC approach (Snow/Sand/Dust termination to OGE hover, Confined areas, Mountain/Pinnacle/Ridgeline.)

        4. Task 1146, Perform terrain flight (NOE, confined areas, pinnacle/ridgeline, terrain flight takeoff and approach.

        5. Task 1152, Perform terrain flight deceleration.

        6. Task 1158, Perform masking and unmasking.

        7. Task 2128, Perform combat position operations.

    1. Anytime the load or environmental conditions increase significantly (5 degrees Celsius, 500 feet PA, or 200 pounds aircraft weight), additional hover power checks must be performed.
    1. NIGHT OR NVG CONSIDERATIONS: Use proper scanning techniques to avoid spatial disori­entation.

    2. TRAINING AND EVALUATION REQUIREMENTS:


      1. Training. Training will be conducted in the aircraft.

      2. Evaluation. Evaluation will be conducted in the aircraft.
    3. REFERENCES: Appropriate common references.


    1. 1030

      1. PERFORM HOVER OGE CHECK.
    1. CONDITIONS: In an OH-58D with aircraft heading into the wind.

    2. STANDARDS: Appropriate common standards plus the following:


      1. Do not allow drift to exceed 10 feet during the ascent, descent or while at a hover.

      2. Maintain heading ±10 degrees.

      3. Establish a hover altitude of 50 feet, ±10 feet, or above surround­ing obstacles, whichever is higher.

      4. Maintain a constant rate of turn, not to exceed 90 degrees in 4 seconds, while performing the required 360‑degree left pedal turn.

      5. Determine if aircraft power and controllability are sufficient.

      6. Do not exceed 200 FPM during the vertical descent.
    3. DESCRIPTION:


      1. Crew actions.

            1. The P* will remain focused outside the aircraft and is responsible for clearing the aircraft and obstacle avoidance. He will acknowledge all drift and obstacle clearance instructions given by the P.

            2. The P will provide drift and obstacle information to the P*. He will note the MAST TQ, ENGINE TQ and TGT values observed. He will warn the P* if it appears that limitations may be exceeded.

      2. Procedures. Vertically ascend to 50 feet or above surrounding obsta­cles, which­ever is higher. Constantly monitor TGT, MAST TQ, ENG TQ and aircraft instruments while not exceeding any limitations. Execute a 360‑degree left pedal turn while constantly checking aircraft power and controllabili­ty. Termi­nate the maneu­ver at an IGE hover, on the ground, or as required.

    1. An OGE hover check should be verified anytime aircraft controlla­bility or power is in doubt.

    2. The position box is not adequate for obstacle avoidance and should not be used as the sole position reference.

    3. An OGE hover check shall not be attempted when the hover power check produces less than 10 percent torque differential.
    1. NIGHT OR NVG CONSIDERATIONS: If possible, select an area with good ground contrast and several reference points that are of the same height or higher than the OGE hover. Under NVG, this procedure helps in maintaining a constant altitude and position over the ground during turns.

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