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his, adjusted with certain formulae,
give the corrections (fixed Wing
ATPL holders in UK can do
compass swings).
The shorter air tests tend to concern
themselves with the proper rigging
of flying controls. The longer ones
creep into the full-blown C of A air
tests which are Extremely Official
and done under strict procedures.
For these, you must be on the
Maintenance Contractor's approved
list of test pilots , which means
having some experience on type and
flying accurately.
The basic idea is to perform a series
of prescribed manoeuvres (timed
climbs, for instance) while an
engineer takes notes of temperatures
and pressures, etc. The results are
plotted on performance graphs (by
you) so they can be compared
against the standard figures in the
Flight Manual, which is where you
see how accurate your flying really is,
when the plotted points end up all
over the place instead of being in a
straight line. Before you start,
though, be sure that the rotors are as
clean as you can get them, because
their state will make a surprising
difference on the climb figures.
Seismic Support
An oil or seismic company operating
out in the field needs a helicopter for
various reasons. First of all, there are
not likely to be any roads, or, at least,
no more than forest access roads to
the staging area, and people (such as
slasher teams and drillers) will need
to be moved, as well as their supplies
which will be anything from fuel for
the drills to explosives. This will
mean a lot of slinging into tiny areas
at the end of a very long line – in the
latter stages, you might have a
86 The Helicopter Pilot’s Handbook
carousel at the end holding six bags
which you must drop carefully in
precise locations, as they hold about
$6000 worth of equipment each. The
expected rate for “production
longlining”, as it’s called, is between
35-45 bags per hour. Sometimes, you
will have a Dynanav or Kodiak
machine to help, which produces a
series of squares on a screen, and
when they all line up, you will be on
target (there is a danger here of not
looking where you’re going when
concentrating on the machine). With
this taking the strain, the slashers
only have to clear a couple of trees
here and there.
In the early stages of the operation,
the slashers (big guys with
chainsaws) will create the helipads so
you can position them in every
morning for the rest of the week
while they cut lines a metre wide for
the surveyors to mark out for
drillers, who make holes for
explosive charges (when the whole
lot is blown up, the vibrations are
recorded and analysed in the hope of
finding oil or gas – alternatives are
electric vibrators or falling weights).
You will need to know how to work
a GPS, as there is some precision
involved, although, outside of
winter, decent map reading skills are
good enough once you know where
the pads are. However, when flying
the lines so the surveyors can check
on how the slashers are doing, you
want one that can pictorially show
you the lines to be flown.
There will be a truck acting as a
flight watch station and you will be
expected to report in every time you
land and take off at any helipad.
Here is a typical one:
The person in the truck (usually the
medic) will be keeping a log of all
movements and radio calls and will
therefore have the most information
to hand if an incident occurs. Expect
also to be given an Emergency
Response Plan, which is a bit of
paper telling you what action to take
in emergencies, together with the
following information:
· Your location (Lat/Long)
· Who's in charge
· Any Radio frequencies
· Police, Fire, Ambulance,
Hospital
· Other helicopter companies
· Medic
· Safety etc
All this concerns your second job of
aerial ambulance. You should always
have enough fuel for the nearest
hospital, but not so much that you
can’t lift the patients, which,
typically, will be the heaviest guys
coming out of the tightest clearing
with the tallest trees. This is one:
Specialised Tasks 87
A couple of tips – try to get fuel in
the staging area, to save both dead
flying time and unnecessary starting
of the engine. This is not always
practical, but as it saves them a lot of
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The Helicopter Pilot’s Handbook(58)
