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From: John Barrett <2thman1@gmail.com>
Subject: Re: [LML] Gear Strut Compression Tool

I understand your logic on this, Steve, and agree as far as it goes.  The pr=
oblem with LIV's and maybe not with Legacys is that the nose gear can easily=
 collapse during ground ops if hydraulic pressure is down and the air strut i=
s weak.  Different issue than emergency extension in flight. I would suggest=
 at least for those of us in the LIV condition, testing the strut on the gro=
und is important.=20

Regards,
John

Sent from my iPad


On Apr 8, 2013, at 9:54 AM, "Steve Colwell" <mcmess1919@yahoo.com> wrote:

> John,
>=20
> Actually, the In Flight alternate gear extension test is the best way to
> determine everything about a gas spring only gear extension.  If the gear
> will not go down when tested in flight, you know there is a problem to be
> found and fixed.
>=20
> Periodically, an In Flight alternate gear extension should be done to veri=
fy
> all three will come down and lock.  Record the airspeed that Gas spring
> operated gear locks down to establish a trend for the gas springs getting
> weaker.  (Side note, I bought a Eldorado in 1979 with one of the new gas
> spring trunk lifts.  After the third one was replaced and the warranty
> expired I used a broom stick, fortunately they are much better and cost le=
ss
> now.)=20
>=20
> As previously mentioned; when the real thing happens, reduce airspeed to
> minimize resistance when the dump valve is opened.  Just curious, how many=

> of us have had to resort to Emergency Alternate Gear Extension?
>=20
> Steve Colwell  Legacy
>=20
>=20
>=20
> Personally I would not rely on a free fall test to check the air strut.  W=
ay
> too much at stake if you're wrong.  I would think the nose gear could free=

> fall perhaps without adequate air strut effectiveness.  Until someone test=
s
> this with multiple air struts that have various strengths I would not trus=
t
> this.
>=20
>=20
> My .02.
>=20
> John
>=20
>=20
>=20
>> Dennis wrote:
>>=20
>> I know this might not work in a Lancair IV, but in my Legacy, I do an
> alternate gear extension test in flight, using gravity and the gas shocks,=

> to confirm that I get three down and locked.  If it works, I don't think
> there is any need to remove the gas shock and test it.
>=20
>=20
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