Nynja Operators Manual issue 2 (E) 1.2
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9.3 Recording and certifying maintenance
9.3.1 All maintenance actions should be recorded in the aircraft airframe
and engine log book(s). Separate worksheets and invoices for parts /
work, should be kept in a file that can be referenced in conjunction
with the logbook entries.
9.3.2 Each logbook entry detailing maintenance should be accompanied by a
signature of the person or persons that have carried out the work.
Any work that is ‘flight critical’ should have a second signature (in
addition to the person that has carried out the work) to certify that
correct reassembly has been carried out. This must be done by a
‘qualified person’- the definition of such a person will be defined by
local regulations.
Examples of tasks that are considered ‘flight critical’ are:
Disassembly/ reassembly of primary structure (rigging / derigging as
defined previously is excepted).
Maintenance by replacement of primary structure
Maintenance by replacement of control systems
9.4 Sourcing parts
9.4.1 Unique airframe parts must be purchased from the manufacturer and
should not be made by a third party or ‘home made’.
9.4.2 Non unique parts may be sourced from other suppliers. However they
should be equivalent in terms of specification and dimension. If there
is doubt, then there is no doubt – they should not be used.
9.5 Engine maintenance
This should be carried out in accordance with the engine
manufacturer’s specific maintenance schedule for the type and model
of engine. Regular checks for engine service bulletins should be made.
