# 300 flight hours inspection

## Preliminary requirements

### Required Conditions

<table><thead><tr><th>Action/Condition</th><th data-type="content-ref">Procedure/Data</th></tr></thead><tbody><tr><td>Remove the right transmission fairing (432BR).</td><td></td></tr><tr><td>Remove the upper-right mid-fuselage access-panel (433BR).</td><td></td></tr><tr><td>Remove the left transmission fairing (432AL)</td><td></td></tr><tr><td>Remove the upper-left mid-fuselage access-panel (433AL).</td><td></td></tr></tbody></table>

### Consumables, materials and expendables

| Name                | Identification/References | Quantity |
| ------------------- | ------------------------- | -------- |
| Drycleaning solvent | C-304                     | AR       |
| Cleaning compound   | C-318                     | AR       |
| Lockwire            | C-447                     | AR       |
| Clean cloth         | C-516                     | AR       |

### Safety conditions

{% hint style="danger" %}
MAKE SURE YOU OBEY ALL OF THE SAFETY PRECAUTIONS WHEN YOU USE SOLVENTS. FAILURE TO DO SO MAY RESULT IN INJURY TO PERSONS AND/OR DAMAGE TO COMPONENTS.
{% endhint %}

{% hint style="warning" %}
DO NOT ALLOW SOLVENT TO MAKE CONTACT WITH PARTS MADE OF ELASTOMERIC MATERIAL OR DAMAGE WILL OCCUR.
{% endhint %}

## Procedure

### Do a detailed inspection of the tail damper assembly as follows:

{% hint style="info" %}
The tail damper isolator springs are constructed from wire rope.
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1. Examine the isolator springs for evidence of broken strands and corrosion and for birdcaging or separation of the wound wires.
2. Examine the clips for condition and security. Both ends of wires must be visible in the window.
3. Examine the stiffener for condition and security.
4. Examine the cotter pins, nuts, washers, and bolts that attach the stiffener and the isolator springs for condition and security.
5. Examine the weights for condition and security.
6. Examine the cotter pins, nuts, washers, and bolts that attach the weights to the isolator springs for condition and security.

### Do a general visual inspection of the hydraulic pressure line (from filter) as follows:

1. Visually examine the hydraulic pressure line (from filter) for mechanical damage and corrosion.
2. Visually examine the fins of the hydraulic pressure line (from filter) for blockage.
3. If there is a blockage, remove the cause.
4. If there is damage to the hydraulic pressure line (from filter), replace the tube.

### Do a general visual inspection of the hydraulic suction tube as follows:

1. Visually examine the hydraulic suction tube for mechanical damage and corrosion.
2. Visually examine the fins of the hydraulic suction tube for blockage.
3. If there is a blockage, remove the cause.
4. If there is damage to the hydraulic suction tube, replace the tube.

### Do a detailed inspection of the crew doors as follows:

1. Clean the eyebolts, latch bolts, and handle with Clean cloth moistened with Drycleaning solvent.
2. Examine the crew doors for cracks, mechanical damage, and corrosion.
3. Examine the eyebolts for cracks, mechanical damage, and corrosion.
4. Shake the eyebolts and make sure that they are not worn too much.
5. Examine the latch bolts of the crew doors for cracks, mechanical damage, corrosion, and ensure the latch bolts retract 0.080 inside the housing at ambient room temperature.
6. Shake the latch bolts and make sure that they are not worn too much.
7. Examine the handles of the crew doors for cracks, mechanical damage, corrosion, and correct operation.
8. Shake the handle and make sure that it is not worn too much.
9. If there is damage to the crew doors, wear on the eyebolts, wear on the latch bolts, and/or wear on the handles, contact customer support and services for permitted damage.

### Do a detailed inspection of the clamshell door as follows:

1. Clean the latch knobs, and hinges with Clean cloth moistened with Drycleaning solvent.
2. Examine the clamshell door for cracks, mechanical damage, and corrosion.
3. Examine the hinges for cracks, mechanical damage, and corrosion.
4. Examine the latch knobs of the clamshell door for correct adjustment, and correct operation.
5. Shake the latch knobs and make sure that they are not worn too much.
6. If there is damage to the clamshell door, hinges, and/or wear on the latch knobs, contact customer support and services for permitted damage.

### Do a detailed inspection of the pivot sleeve assembly as follows:

1. Lift up the boot from the outer cap assembly as follows:
   1. Cut and remove the lockwire from the bottom of the boot.
   2. Remove the boot from the outer cap.
2. Move the cyclic stick and grip assembly fully forward.
3. Examine the pivot sleeve assembly for wear, mechanical damage, and corrosion. Look carefully at the ball area.
4. Examine the two slots on top of the pivot sleeve assembly for wear and deterioration.
5. Move the cyclic stick and grip assembly fully aft.
6. Examine the pivot sleeve assembly for wear, mechanical damage, and corrosion. Look carefully at the ball area.
7. Examine the two slots on top of the pivot sleeve assembly for wear and deterioration.
8. Move the cyclic stick and grip assembly fully left.
9. Examine the pivot sleeve assembly for wear, mechanical damage, and corrosion. Look carefully at the ball area.
10. Examine the two slots on top of the pivot sleeve assembly for wear and deterioration.
11. Move the cyclic stick and grip assembly fully right.
12. Examine the pivot sleeve assembly for wear, mechanical damage, and corrosion. Look carefully at the ball area.
13. Examine the two slots on top of the pivot sleeve assembly for wear and deterioration.
14. While another person moves the collective stick and grip assembly slowly, examine the sleeve bearings between the pivot sleeve assembly and the support assembly for radial play and smooth operation.
15. While another person moves the collective stick and grip assembly slowly, examine the bushings for wear.
16. If there is damage to the pivot sleeve assembly, wear on the bushings, and/or play on the sleeve bearings, refer to component maintenance for permitted damage.
17. Make sure that the pivot sleeve assembly is correctly installed.

{% hint style="warning" %}
Do not let the solvent touch the boot or damage to the boot can occur.
{% endhint %}

18. Install the boot on the outer cap assembly as follows:
    1. Visually examine the outer cap assembly for unwanted material.
    2. If necessary, clean the top of the outer cap assembly with a Clean cloth moist with Drycleaning solvent.
    3. If there is oil or grease on the boot, clean it as follows:
       1. Clean the boot with Cleaning compound.
       2. Flush with water, then dry the boot with a Clean cloth.
    4. Put the bottom of the boot in position around the outer diameter of the outer cap assembly.
    5. Safety the bottom of the boot with Lockwire.

### Do a detailed inspection of the support assembly as follows:

1. Clean the support assembly with a Clean cloth moistened with Drycleaning solvent.
2. Examine the support assembly for mechanical damage and corrosion.
3. Shake the idler assembly and make sure that the bushings are not worn too much.
4. If there is damage to the support assembly and/or wear on the bushings, refer to component maintenance for permitted damage.
5. Make sure that the support assembly is correctly installed.

## Requirements after job completion

### Required Conditions

<table><thead><tr><th>Action/Condition</th><th data-type="content-ref">Procedure/Data</th></tr></thead><tbody><tr><td>Install the upper-left mid-fuselage access-panel (433AL).</td><td></td></tr><tr><td>Install the left transmission fairing (432AL)</td><td></td></tr><tr><td>Install the upper-right mid-fuselage access-panel (433BR).</td><td></td></tr><tr><td>Install the right transmission fairing (432BR).</td><td></td></tr></tbody></table>
