Posted for Laurie Fitzgerald:
As the video has turned up on the LML I guess a description of the event
may provide some useful information for those interested. Please feel free to post the following:
VH-FTZ is an Australian registered Aircraft constructed from a Lancair
IV-P fast build kit and heavily modified to accept the Walter M601D
Turbine.
The aircraft is not entirely the same as a factory Propjet as it was conceived
and built prior to Lancair releasing a Propjet.
Construction commenced in June 1999 and the first flight was June 2003.
The Aircraft is based at Jandakot airport in Perth Western Australia and
has flown just short of 500 hours.
Prior to this event there have only two maintenance issues firstly a
broken spring on the nose gear was ingested by the turbine requiring a
compressor rebuild (thanks Diemech) and second was a cracked windscreen due to
the Australian sun in the outback causing temperatures sufficient to soften the
perspex which then cracked when cooled. The windscreen was replaced with a 1/2
inch screen.
I am the owner, builder and pilot of FTZ and in the absence of
organisations such as LOBO in Australia have personally researched and
filtered all available information to enable me establish a safe operating
regime for my aircraft.
I am a relatively low time private pilot with 1650 hours total time. 1000 hours
on a Glasair 1RG and 500 on the Lancair.
For the record, FTZ approaches a stall at 80 knots clean at 14000 feet. On
normal operations I rotate for take off at 90 knots and touch down at 100
knots.
On February 7, 2010 I conducted a return flight from the south coast of Western
Australia, shortly after takeoff on climb through 5000 ft at 200 knots I
heard a distinct sound that I soon realised was hydraulic fluid escaping, the
hydraulic pressure gauge was indicating a rapid loss of pressure. I
immediately shut the throttle, held the nose up attitude and selected gear down
as the airspeed decayed below 160knots. The gear dropped but there was insufficient
hydraulic pressure to extend or lock the gear. I pulled the hydraulic pump
breaker and levelled out and maintained 130 knots and exercised the manual
hydraulic pump, this confirmed that hydraulic pressure could not be maintained
and that a gear extension was not possible.
I held overhead an 1800 metre runway and assessed the situation. I was carrying
300 litres of JetA1 and the annunciator panel indicated the main doors
were open with no greens.
I contacted ATC and advised them of my situation and arranged to transit back
to Jandakot Airport where emergency services were available.
On arrival at Jandakot I conducted a low level pass and ATC confirmed the nose
gear was half extended and no mains were visible and the main doors appeared
closed.
I left the control zone and burnt off the excess fuel, during the hour
and a half taken to reduce the fuel load I slowed the aircraft to 100
knots to determine whether the nose gear gas strut would lock the
nose gear at touchdown speeds, transferred all fuel from the belly tank
and briefed myself for a wheels up landing.
I returned to Jandakot with approximately 50 litres of fuel per side and conducted
a final fly past the tower to confirm no change to the gear configuration
and then joined the circuit for a landing. I flew a three mile final (flapless)
with 450 ft per minute descent and at one and a half miles reduced to 200
ft per min descent.
At 500 metres from touchdown I was indicating 115 knots and shut down the turbine
and turned off the master switch, I did not attempt to flare but held off
slightly to lose as much speed as possible. The tail contacted the runway
lightly and I released back pressure on the control and let the propellor
contact the runway.
At this point I was surprised that the aircraft did not have sufficient
mass or inertia to immediately bend the blades which I had left in fine
pitch to facilitate braking and I thought in this configuration they would
bend rather that dig in.
On each rotation of the windmilling propellor the nose of the aircraft
was walked right on the tip of the blades causing a significant yawing.
Full rudder slowed but would not arrest the yaw. When the blades finally
bent sufficient to allow the belly of the aircraft to settle on the runway
the rudder authority was adequate to steer the aircraft on to the
centreline and maintain a straight ahead line.
The aircraft stopped sliding and I exited uninjured, largely due to the
fact that the energy was all dissipated during the slide on the runway and
there was no real vertical component.
The Aircraft was raised, I pulled the wheels from their wells
and pushed them to the locked position and towed the aircraft to my
hanger.
The aircraft sustained remarkably little damage:
Abrasion damage to the belly tank and just behind the wing spar down to
the nomex core.
Paint damage to the gear doors and left wing.
Require new Pitot and TX antenna
Require one aileron hinge and rod end.
Paint damage to tail.
And the big one require new prop and engine overhaul.
The cause of the hydraulic failure was a failed flare fitting on the main hydraulic
line between the pump and the hydraulic valve that actuates gear and
flaps.
The cause of the flare fitting failure is not yet finally determined but
the flare was correctly manufactured, however over torquing or repeated
torquing may have assisted the failure.
My research to date has revealed that single flares are not adequate
for aluminium lines below 3/8 of an inch and that lines of this size
should be double flared. I will be replacing all high pressure lines
with double flares. I intend to liase with Fred Moreno and study the
failed flare, one of us will report on this list the final outcome.
Although a little off topic I need to address Scott's
comment
"Yes, very professional looking chap flying shoeless." Without
wishing to be over sensitive that comment would be acceptable if I
were British. As an Australian the following would be more correct.
"Yes, very
professional looking Bloke flying shoeless."
On the matter of flying sans shoes I adopted this habit when flying the Glasair
1RG, as shoes, boots and wooden legs interfered with the operation of the
toe brakes and on occasions passengers managed to put their number 9's up
into the wiring behind the rather tight panel.
I maintained the habit (although I usually wear socks) in
the
Lancair after seeing a pilot badly burnt after an accident when their feet
and legs where trapped under the panel and they could not extricate
themself.
Also I have often puzzled at the reason for wearing footwear as in most accidents
I have witnessed, the shoes are found many metres away from the owner. Finally
if a flying suit, boots, helmet and visor made us more professional I'd
probably have felt better at the post landing media circus.
Safe flying to all
Regards
Laurie Fitzgerald