RotorWay Exec 162F Specifications download pdf (Page 67)

RotorWay International

Exec 162F Maintenance Manual

Rev. 1 3/03

Section 22: Inspection Guide

for Hard Landings,

Tail Rotor Strike, or Roll Overs

After any type of accident, roll over, main and/or tail rotor strike, hard landing, etc. it is very important to thoroughly inspect

any areas that may have been damaged or subjected to excessive stress. It is impossible to anticipate all the consequences

of every accident, therefore individual inspections of your aircraft will depend on yourself. Non-destructive inspections

(NDI) may be available locally, however RotorWay will also perform these services for you on parts or components you

return to the factory. Listed below are some of the major areas of concern in case of an accident.

1. MAIN ROTOR BLADES: Damaged rotor blades can not be repaired. Associated components such as retention

straps, pitch horns, and retention hardware will most likely have been subjected to undue stress and are not

recommended for reuse.

2. ROTOR SYSTEM: In cases where main blades contacted the ground or other objects, several items require inspection.

Elongation of pitch pin holes in the hub plate or gouges in the hub plate surface require the hub plate to be replaced.

The main shaft may be bent, and any bending requires replacement. The slider ball may be damaged depending upon

the location of the bent main shaft. All casting pieces should be Zyglo inspected, though if no stoppage has occurred

between rotating and non-rotating parts, damage should not have occurred.

Thrust blocks should have no sign of deformity or cracking. Control rods and rod ends should be replaced if bent.

Teeter blocks and sprocket hub hardware should be replaced. The main rotor drive pin and teeter block bearings

require replacement.

3. CONTROLS: Replacement of cyclic cables is required in case of a blade strike. Inspection of cyclic and collective

controls is required in the event of a blade strike or swash plate stoppage.

4. SECONDARY DRIVE: If a roll over accident or blade strike occurs, the secondary unit should be returned to the

factory. The secondary unit is not a field serviceable assembly. The chain requires replacement in case of a roll over.

5. TAIL ROTOR: If the tail rotor blades are damaged, the pivot pins must also be replaced. The tail rotor shaft must be

inspected for any bending. The thrust bearing container should be inspected for cracks, paying close attention to snap

ring groove locations. A tail rotor strike also requires replacement of the tail rotor drive belts and inspection of the

lower secondary shaft (see Section 10, Service Note 2B).

6. TAIL BOOM: Location and amount of damage will determine if repair or replacement is necessary.

7. AIRFRAME: When a blade strike occurs, impact forces are transmitted throughout the airframe. After a complete

teardown, inspect the airframe for deformation and cracks, primarily in the drive system area. If damage occurs in the

hood bracket area or to the square drive tubes, a new airframe may be required.

In case of a hard landing, landing gear skids may be damaged. Repair of landing gear should not be done. All landing

gear attachment points and brackets associated with landing gear attachment require inspection.

8. POWER PLANT: Inspection required will depend upon the power applied during the mishap. The condition of the

engine will depend on impact damage and possible damage from power applied at the time of the blade impact.

Obviously more internal damage could occur if the engine was forced from full power and full RPM to a full stop in just

a few revolutions. Crankshaft end play needs to be checked in case of a hard landing. The valve train needs to be

inspected and freedom of the engine to be rotated by hand should be accomplished.

Note: Log Book entries are required for inspection or rebuild of a damaged aircraft. If reusing a part or component, a

log book entry needs to be made stating that the part has been inspected and found to be okayed for service.

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RotorWay Exec 162F Specifications Page 67

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