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Hi Gary,
Your series of comments on John Denver is of particular
interest to me as I was introduced to flying by a friend with a Long EZ. He
once told me of an incident he had with the fuel valve (that was between his
legs) where the valve had jammed at an inopportune moment and there was nothing
he could do to free it. Having landed safely with very little fuel
remaining in the active tank he found that he needed a spanner to get the valve
to move. This particular valve is commonly used in homebuilt aircraft and
when I received one as part of a RV6 kit, I examined it to determine why it
might be susceptible to a jam. It has a brass body with a tapered brass
core that apparently relies on lubrication to stop the two faces from
binding. There is a possibility that over time the lubrication might be
removed by the fuel. I modified my valve with a washer to prevent the
taper from bottoming out and never had this problem. I recently changed
the valve for one of better quality as I have never been able to get this out of
my mind and often wondered about the John Denver accident. If he had to
release his seat belt to battle with a valve behind him then the situation after
possibly bumping the control column forward would have been dire.
I recently received a call from a reader
that said he was learning to fly, but had a recurring problem. He said that each
time he took to the air, he became unreasonably afraid that the engine was going
to quit. He said that it wasn’t just a nagging worry but rather that he remained
tense and nervous throughout each entire flight constantly fretting that the
engine would quit at any given time and that he would then be doomed. After
chatting for a while it certainly seemed as if he was genuinely concerned that
he would indeed be in mortal danger if he were ever greeted by a whole lot of
silence from up front. I advised him to get his instructor to skip some lessons
and move on to the simulated forced landing part of the training course so that
he could see that, should the engine fail, there was indeed a whole lot that he
could do about it. This would then hopefully allay any future
fears.
Engine failure in any aircraft is
extremely rare but it does happen. In my 9000+ hours I have experienced three
engine failures so it does indeed sometimes happen. It is for this reason that
there are procedures in place and it is vitally important for any and all pilots
to practise regularly. In the airlines, pilots are regularly drilled in
simulators on engine failure and recovery techniques and PPL’s too have to renew
their licenses every two years by demonstrating their expertise should an engine
fail. Doing a practise forced landing only once every two years though is by far
not enough. You would do well to round up an experienced instructor at least
every six months and simulate engine failure under various different
circumstances.
Engines can fail for a variety of
reasons. In one of my three experiences I was working flat out at a flying
school. We were extremely busy each day and it got to the stage where one flight
just melded in with the next. On one such day I went on a training flight with a
student in an aircraft that had a broken starter motor. I hand swung the engine
to life and off we went. The flight was to practise simulated forced landings
and once in the general flying area at altitude, I shut down the engine to
initially show the student that the aircraft glides just as it should with the
propeller standing still. I then flicked the starter to demonstrate the air
start only to have the realisation dawn on me that this was the trainer with no
starter motor! Darn! That’ll teach me to leave my brain on autopilot! Anyway, I
then merely continued with the demonstration of the forced landing with the only
difference being that this was now for real, rather than a simulation. We both
learned a lesson that day.
On the other occasion I was flying a
Baron at altitude when one of the pistons on the right-hand motor began
disintegrating. I had to shut down the engine and return to base on one engine
but there was no panic involved, merely the following of procedure. I
appreciated having a “spare” engine that day. On the third occasion I also had
to shut down a misbehaving engine in a twin but there were no dramatics and the
flight ended peacefully.
An engine failure in any aircraft is
never meant to be fun, especially if it is in a single, but there should also
not be any reason for panic. In the early days, before carburetors were added to
engines, the only way pilots could control the power output of the engine was to
either have it switched on, or off! In other words, for the descent, the engine
was merely switched off and then “blipped” every now and then to keep the
propeller windmilling so that they had power if they needed it. Once they were
committed to a landing the engine was left switched off altogether. Gliders too
do a forced landing every time they fly and you don’t hear them grumbling! Large
airliners too often reduce power to idle and glide from altitude all the way to
final approach. They are really just big gliders with forward thrusters.
Remember that if an engine fails in a single engined aircraft, you need merely glide the aircraft to a reasonably flat piece of open ground and land it, fully stalled, into wind. You will then touch down at the lowest possible ground speed and you need merely prevent the aircraft cabin from striking anything solid and you will walk away from it. Easy huh? Get yourself an instructor and go and practise them forced landings. You owe it to yourself not to be too surprised when the cabin goes quiet.
Name? Steve
Odendaal
Age?
54
Personal
qualifications? Matric
Flying
qualifications? CPL, Gr.II 5,500 hrs
Do you own an aircraft? If not, what do you fly? Harvard, Dakota, Bosbok, Kudu, Albatross
What is your day job? Civil Aviation Head of Operations NTCA
Why did you choose
flying as a career/sport? Same old same old � always
wanted to fly
What irks you about aviation? Not following SOP’s and procedures
Can anybody learn to
fly? NO
Describe your most memorable flight? 300hr, full IFR, vertigo for 30 minutes
Your closest call/most
anxious moment? Student landing short, a/c written
off
Your most admired aviation personality? Sailor Malan
What is your ultimate goal in aviation? Raise flight training standard
What aircraft would you still love to fly? L39
What direction do you think aviation will take in the future? More simulation
What is the most important single item of advice/suggestion that you would wish to pass on to your fellow aviators? Fly high and become an old pilot
Do you read Aviation &
Safety Magazine? Yes