Mark and Netters,
The nutshell version he gave you sounds about right. Just swapping out a
'vair for a 'vair shouldn't have much impact on the flight characteristics you
established during your testing period.
There are a few more chapters and verse that apply, depending if the
aircraft was repaired or altered by the holder of the Repairman Certificate.
The
whole search will take you from part 21 to 43 to 65.
If you have a second hand aircraft that requires the condition inspection
be conducted/signed off by at least the holder of an A&P rating, then the
minor and major alterations would also require the same.
43.5 Approval for return to service after maintenance, preventive
maintenance, rebuilding, or alteration states "No person may approve for return
to
service any aircraft, airframe, aircraft engine, propellor, or appliance that
has undergone maintenance, preventive maintenance, rebuilding, or alteration
unless-
(a) The maintenance record entry required by 43.9 or 43.11, as appropriate
has been made;
(b) doesn't apply to expiremental
(c) If a repair or alteration results in any change in the aircraft
operating limitations or flight data contained in the approved aircraft flight
manual, those operating limitations or flight data are appropriately revised
and
set forth as prescribed in 91.9 of this chapter."
The FSDO should have also referenced 21.19 as well, that may have more
aptly covered the subject;
"Each person who proposes to change a product (your plane) must apply for a
new type certificate if the Administrator finds that the proposed change in
design, power, thrust, or weight is so extensive that a substantially
complete investigation of compliance with the applicable regulations is
required."
That one may be the key for the fellow that wanted to make lots of changes
to the homebuilt he purchased and have it re-certified (new certificate
issued) allowing him to apply for the repairman certificate.
The interesting thing about regulations is that they can be used by you as
a tool if you can wade through and understand them, because just as that
inspector had to try a find an answer, you could suggest the proper sections
to
him and get things completed more quickly (he might even learn his job a
little better)
My two cents;
Ed Larsen
Larsen Airpark (43G)
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