Table of contents introduction



Download 1.63 Mb.
Page47/50
Date conversion08.07.2018
Size1.63 Mb.
1   ...   42   43   44   45   46   47   48   49   50

TRAINING AND EVALUATION REQUIREMENTS:


  1. Training. Training may be conducted academically or in the aircraft.

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





    1. 4244

      1. PERFORM HYDRAULICS-OFF CHECK
    1. CONDITIONS: In an OH-58D helicopter.

    2. STANDARDS: Appropriate common standards plus the following:


      1. Maintain airspeed of 80 ±10 KIAS.

      2. Maintain the aircraft in trim.
    3. DESCRIPTION:


      1. Crew actions.

            1. The MP will perform P* duties during this check and remain focused outside the aircraft during the maneuver. He will brief the RCM/NCM concerning any Warnings, Cautions, or Notes that may impact upon the checks to be performed. He may direct assistance from the RCM or NCM in maintaining airspace surveillance, and monitoring and acknowledging MFD messages. The MP will brief the RCM/NCM on the use of the terms “Hydraulics Off”, “Hydraulics On”, and “Check Complete”, and the emergency procedures to be performed in the event of a hydraulics system failure.

            2. The RCM or NCM should assist the MP as directed.

      2. Procedures. Brief the RCM or NCM on the maneuvers to be performed, commands he should expect to hear, and the resultant actions he will take. Direct the RCM/NCM to identify the HYD SYS switch before instructing him to select the system to either off or on. Brief him to maintain his hand on the switch until he is told to remove it, and not to move the switch until directed to do so.

            1. Select an altitude that will allow for safe recovery in the event of a hydraulics failure. Establish level flight, in trim, into the wind at 80 KIAS.

            2. Direct the RCM/NCM to identify and select the HYD SYS switch to the OFF position using the briefed command.

            3. Confirm the LOW HYD PRESS and SCAS DISENG caution messages displayed and acknowledge the audio. If pitch and roll attitude can be maintained without unusual effort, direct the RCM/NCM to remove his hand from the HYD SYS switch.

            4. Do not exceed any aircraft limitations during the following maneuvers. Confirm the aircraft maneuver area is clear and then check controllability by making shallow left and right turns. Establish level flight. Maintain the aircraft in trim during the following collective checks. Lower the collective and verify that mast torque can be decreased to at least 17%. Raise the collective and verify that mast torque can be increased to at least 83%. Excessive force should not be necessary to achieve either of the mast torque settings.

            5. Upon completion of the collective checks, reestablish level flight. Relax pressure on the flight controls.

            6. Direct the RCM/NCM to again identify and select the HYD SYS switch to the HYD SYS position using the briefed command. Reengage the SCAS PITCH/ROLL and YAW switches.

            7. Upon completion of the check, record required data on the MTF check sheet.
    4. SINGLE PILOT CONSIDERATIONS: This check will not be performed without an additional crewmember onboard. Either an additional RCM or a NCM is required to be on board to assist with HYD SYS switch functions. Except for rated aviator duties, the RCM crew actions described above may be accomplished by the NCM at the direction of the MP.

    5. TRAINING AND EVALUATION REQUIREMENTS:


      1. Training. Training may be conducted academically or in the aircraft.

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


    1. 4250

      1. PERFORM COLLECTIVE ANTICIPATOR CHECK
    1. CONDITIONS: In an OH-58D helicopter.

    2. STANDARDS: Appropriate common standards plus the following:


      1. Select an area that will permit a safe descent and emergency touchdown landing.

      2. Maintain airspeed of 80 ±10 KIAS into the wind.
    3. DESCRIPTION:


      1. Crew actions.

            1. The MP will perform P* duties during this check. He will brief the RCM/NCM, if available, concerning any Warnings, Cautions, or Notes that may impact upon the checks to be performed. He may direct assistance from the RCM or NCM to clear the aircraft and maintain airspace surveillance.

            2. The RCM or NCM should assist the MP as directed.

      2. Procedures. If the RCM/NCM is available, brief him on the maneuvers to be performed, and direct his assistance in clearing the aircraft and maintaining airspace surveillance. Select an area for this check that will permit a safe descent and emergency touchdown landing if necessary. Maneuver the aircraft to establish an upwind track to the selected area. Establish level flight, in trim, at 80 KIAS. Confirm the aircraft maneuver area is clear. Announce initiation of the maneuver and lower the collective until NG is stabilized at 78% ±1. Increase the collective at a rate that will achieve 85 percent mast torque in not more than five seconds. Confirm that the NR/NP droop does not exceed, 4%(I), 2%(R). If the NR/NP droop exceeds, 4%(I), 2% (R), the MP will terminate the test flight and return to the maintenance facility for corrective action. Upon completion of the check, record required data on the MTF check sheet.

    1. The five-second pull is the maximum, (and desired), length of time to attain 85% mast torque. As an example, if the system droop is only 2% in a three-second pull, the system is functioning properly.
    1. TRAINING AND EVALUATION REQUIREMENTS:


      1. Training. Training may be conducted academically or in the aircraft.

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


    1. 4252

      1. PERFORM VIBRATION ANALYSIS
    1. CONDITIONS: In an OH-58D helicopter.

    2. STANDARDS: Appropriate common standards plus the following:


      1. During 4/Rev vertical vibration check, maintain airspeed required to induce the vibration.

      2. During increasing airspeeds, do not exceed computed VNE.
    3. DESCRIPTION:


      1. Crew actions.

            1. The MP will perform P* duties during this check. He will brief the RCM/NCM, if available, concerning any Warnings, Cautions, or Notes that may impact upon the checks to be performed. He may direct assistance from the RCM or NCM to clear the aircraft and maintain airspace surveillance.

            2. The RCM or NCM should assist the MP as directed.

      2. Procedures. If a RCM or NCM is available, brief him on the maneuvers to be performed, and direct his assistance in clearing the aircraft and maintaining airspace surveillance. Upon completion of the check, record required data on the MTF check sheet. Perform the following procedures:

            1. 4/Rev vertical vibration check. A 1/rev vibration will normally mask a 4/rev vibration. The 4/rev check should not be performed if a 1/rev exists.

          1. Establish level flight, in trim at the airspeed where the 4/rev is most pronounced, (use 70-80 KIAS for training and evaluation).

          2. Confirm the aircraft maneuver area is clear. While maintaining the aircraft in trim, and at the appropriate airspeed, first execute a 45-degree right bank, followed by a left turn to establish a stabilized 45-degree left bank. Note any change in the 4/rev-vibration level. An increase or decrease in vibration will indicate the presence of a correctable condition. Correctable vibrations are determined as acceptable or unacceptable depending on the severity. If the 4/rev vibration remains constant during the maneuvers, it is inherent, and therefore considered uncorrectable. If an intermittent 1/rev is encountered, it is an indication of a product balance problem.

            1. Analysis during increasing airspeeds. While maintaining straight and level flight, progressively increase the airspeed from 70 KIAS to VNE in 10-knot increments. Note any increase or decrease in vibration levels. If vibration is encountered, perform a 800 fpm letdown check to determine whether the vibration is mechanical (pitch change links), or aerodynamic (trim tabs). Terminate the maneuver if vibrations become severe.

    1. These procedures should be used to determine whether AVA equipment should be installed for further vibration analysis or rotor smoothing, or if other maintenance action is required.
    1. TRAINING AND EVALUATION REQUIREMENTS:


      1. Training. Training may be conducted academically or in the aircraft.

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


    1. 4270

      1. PERFORM FLIGHT INSTRUMENTS CHECK
    1. CONDITIONS: In an OH-58D helicopter with all main rotor vibrations minimized.

    2. STANDARDS: Appropriate common standards plus the following.

    3. DESCRIPTION:


      1. Crew actions.

            1. The MP will perform P* duties during this check. He may direct assistance from the RCM or NCM to clear the aircraft and maintain airspace surveillance.

            2. The RCM or NCM should assist the MP as directed.

      2. Procedures. Announce initiation of the check. Select VSD page on MFD. Verify proper indications are displayed and there are no excessive fluctuations. Confirm that the standby instruments correlate with the VSD display.

            1. (R) Perform rotorcraft mapping systems checks.

            2. Upon completion of the check, record required data on the MTF check sheet.
    4. TRAINING AND EVALUATION REQUIREMENTS:


      1. Training. Training may be conducted academically or in the aircraft.

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


    1. 4272

      1. PERFORM COMMUNICATION CHECKS
    1. CONDITIONS: In an OH-58D helicopter.

    2. STANDARDS: Appropriate common standards plus the following:

    3. DESCRIPTION:


      1. Crew actions.

            1. The MP may perform these checks or direct the RCM/NCM to perform them, as appropriate. If the MP performs the checks, he will direct the RCM (P*) to remain focused outside during the procedures, maintain level flight, and airspace surveillance.

            2. The RCM or NCM should assist the MP as directed.

      2. Procedures. Brief the RCM/NCM as appropriate. Verify that all radios are functioning properly on at least two frequencies. Check all installed secure radio equipment for proper operation. Confirm proper operation of the transponder with the local ATC facility. Upon completion of the check, record required data on the MTF check sheet.
    4. TRAINING AND EVALUATION REQUIREMENTS:


      1. Training. Training may be conducted academically or in the aircraft.

      2. Evaluation. Evaluation will be conducted in the aircraft or academically.
    5. REFERENCES: Appropriate common references.


    1. 4276

      1. PERFORM SPECIAL/DETAILED PROCEDURES
    1. CONDITIONS: In an OH-58D helicopter and equipment installed.

    2. STANDARDS: Appropriate common standards plus the following:


      1. Perform special/detailed procedures according to TM 55-1520-248-MTF.
    3. DESCRIPTION:


      1. Crew actions.

            1. The MP may perform these checks or direct the RCM/NCM to perform them, as appropriate. If the MP performs the checks, he will direct the RCM (P*) to remain focused outside during the procedures, maintain airspace surveillance and/or obstacle avoidance as appropriate.

            2. The RCM or NCM should assist the MP as directed.

      2. Procedures. Brief the RCM/NCM on the checks to be performed. Check any equipment installed on the aircraft for which special detailed procedures are contained in Section IV of the MTF. Use additional reference publications as required. If these checks are performed during an MP or ME evaluation, the evaluated crewmember should demonstrate knowledge of the system, published operational checks, and knowledge of published charts, graphs, and work sheets. Upon completion of the check, record required data on the MTF check sheet.
    4. TRAINING AND EVALUATION REQUIREMENTS:


      1. Training. Training may be conducted academically or in the aircraft.

      2. Evaluation. Evaluation will be conducted in the aircraft or academically.
    5. REFERENCES: Appropriate common references.


    1. 4280

      1. PERFORM BEFORE LANDING CHECK
    1. CONDITIONS: In an OH-58D helicopter.

    2. STANDARDS: Appropriate common standards plus the following:

    3. DESCRIPTION:


      1. Crew actions.

            1. The MP may perform these checks or direct the RCM/NCM to perform them, as appropriate. If the MP performs the checks, he will direct the RCM (P*) to remain focused outside during the procedures, maintain level flight, and airspace surveillance.

            2. The RCM or NCM should assist the MP as directed.

      2. Procedures. Announce initiation of the before landing checks. Perform the before landing checks in sequence. During the descent, confirm that the radar altimeter analog bar reappears, at 180 10 feet. Confirm the LO indicator flashes, and the warning audio activates at the selected altitude, ±10 feet, AGL. Upon completion of the check, record required data on the MTF check sheet.
  • 1   ...   42   43   44   45   46   47   48   49   50


    The database is protected by copyright ©dentisty.org 2016
    send message

        Main page