RotorSport Bishops Castle, Руководство по обслуживанию

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Copyright of RotorSport UK Ltd
Document number RSUK0288
Page 18 of 55
Primary and Secondary structure determination:
A primary structural part is one for which the failure would be catastrophic and would
prevent continued safe flight and landing.
All other structure can be considered as Secondary, thus failure of a Secondary structural
part would not be immediately catastrophic and with due care continued safe flight and/or
a safe precautionary landing could still be made.
Because of the simplicity of the aircraft structure some parts have a dual role – such as
the composite body. As an example, the composite body of the aircraft is primary
structure, yet it carries attachment point for items not flight critical).
The primary structural elements are considered to be:
Composite body.
Connection assemblies joining the rotor head to the body mast.
The rotor assembly and rotor head
The keel, tail and rudder assy
The rudder and rotor control system
The main undercarriage and nosegear
Whilst other items may have an effect on flight safety, they are considered secondary to
the above. The undercarriage is included, as whilst it does not contribute to safe flight, it is
difficult to make a safe landing without it - inevitably an aircraft rollover would result,
probably destroying the aircraft.
Critical parts.
The following parts and assemblies have been denoted critical during the design review
process, and special care must be taken with them.
Item & pt No. Reason/comment
BG1841 Rotor Head Upper
Assembly Correct assembly of pitch, roll, main bearing and teeter
bolts/nuts and splits pins is essential for safe operation
BG1842 Rotor Head Lower
Assembly Correct assembly of pitch, roll, main bearing and teeter
bolts/nuts and splits pins is essential for safe operation
BG3249 Mast welded
fabrication Must be inspected carefully for cracks or other weld
problems
BG4386 Rotor assembly Correct assembly of the rotor system is essential for
safe operation
BT4837 Rotor blade Damage or fracture of the rotor blade is not permitted.
BT718 Teeter bolt Must be correctly fitted, with no cracks or damage for
safe operation
BT3795 Teeter tower No cracks or damage permitted for safe operation
BT3796 Main bearing nut Critical part, must be properly tightened and correctly
fitted with a split pin.
BT5957 Main bearing bolt Critical part, must be properly tightened and correctly
fitted with a split pin.
BT5652 Mast box section Must be inspected carefully for cracks or other fractures
BT5890 Gimbal block Must be free of cracks or fractures for safe operation
Page issue 2, dated 11.03.13