The NAAA process for evaluating the value of aircraft
utilizes detailed criteria and instructions for the
individual appraiser in order to eliminate the subjectivity
used by a non-certified aircraft appraiser. These criteria
and instructions, together with comprehensive data bases and
proprietary computer software in the hands of highly
qualified aviation professional produces the most accurate
and objective appraisal possible.
The criteria below are an example of those used by NAAA
appraisers in assessing the condition of the exterior paint.
Similarly detailed criteria are used for other assessments
of the aircraft's condition.
EXTERIOR PAINT GRADING
#10 Rating: Condition of the exterior paint is flawless.
External painted surfaces have a deep, rich, wet look. There
is no pooling, sagging, running, orange peeling, thin areas
or over-spray on any painted surfaces. Stripes and numerals
are well defined with crisp lines and no irregularities. The
paint is of high quality. If a re-paint, all surfaces have
been stripped and prepared properly and consistent with the
paint manufacturers recommended application procedures. The
age of the paint is two years old, or less.
#9 Rating: Exterior painted surfaces are almost flawless. In
almost every aspect the painted surfaces would meet the #10
rating criteria except for minor exceptions. The paint may
be over two years old but less than 5 years old if the
aircraft is tied down outside or 10 years if old if the
aircraft is stored under cover. There may be a very small
amount of dust particles in the paint. There may be a few
chips in the paint under the fuselage from props slinging
pebbles. Paint looks like new and the above discrepancies
are only discernible upon very close inspection.
#8 Rating: Paint has a wet look with a few chipped areas
under wings, fuselage and empennage. Leading edges may show
first stages of abrasion wear but overall the paint is in
very good condition and shows very well within 20 feet.
#7 Rating: Paint has a good shine with some abrasion wear on
leading surfaces but still retaining good coverage.
Repainted surfaces or touched up areas are not noticeable.
The paint may be new with a limited amount of orange peel,
pooling, sags or over-spray. However, painted surfaces are
well protected and the aircraft has good eye appear.
#6 Rating: Paint is beginning to oxidize with evident
abrasion wear on leading edges. Paint is in need of a good
cleaning and waxing to give it a semi-gloss appearance. If
recently painted, there may be pooling, sagging, running or
orange peeling and/or significant amount of foreign
particles in paint. Accent trim may be of poor quality, but
paint overall would be adhering well to surfaces. Overall
appearance within 30 feet is fair to good.
#5 Rating: Paint is oxidizing and there may be numerous
areas of chipping on lower surfaces of aircraft. Leading
edges show significant signs of abrasion wear, but are
protected by paint. Surface corrosion may be apparent on the
airframe and will affect paint because the painted surface
must be stripped in order to treat the corrosion. Overall
appearance is fair within 30 feet.
#4 Rating: Consistent with all of the characteristics of #5
rating except the aircraft will soon need repainting.
Overall appearance is poor to fair and cleaning/waxing will
not significantly improve the appearance or protection of
the aircraft surfaces.
#3 Rating: Paint is poor quality, oxidized and shows
excessive wear on leading edges and control surfaces. Many
chips and scratches are apparent and overall the aircraft
needs painting. However, the paint is protecting the
aircraft surfaces, but looks poor.
#2 Rating: Aircraft needs painting. No good points.
#1 Rating: Aircraft needs painting, and additional
preparation of the aircraft surfaces is required before
painting. Generally consistent with aircraft having
extensive corrosion on surfaces.
These exacting standards are
impossible to determine without a physical examination of
the aircraft. This is just one of the many standards used
for all the different aircraft components.