Mailing List lml@lancaironline.net Message #54483
From: <Sky2high@aol.com>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Re: Turbine IVP Landing Accident Video
Date: Tue, 16 Feb 2010 13:26:19 -0500
To: <lml@lancaironline.net>
Bob,
 
The 1976 C337G I flew had the pump circuits arranged so that if the reservoir level dropped below a certain point, the pump would not run.  However, the reservoir held enough fluid so that the hand pump could get the gear down (about 40 strokes).  Depending on where the broken fitting was, even this may not have helped Laurie.
 
Scott 
 
In a message dated 2/16/2010 8:10:27 A.M. Central Standard Time, marv@lancair.net writes:
Posted for "Robert Pastusek" <rpastusek@htii.com>:

 Laurie,
 
First of all, a very nice job of taking care of this emergency! Also, thanks
 so much for the report to the rest of us. As you note, these things always
 provide useful information, and this one caused me to think again about my
 own airplane. Most of my IV-P electrical system is protected with fuses; the
 alternators and hydraulic pump being the exceptions, and with the CB's for
 these made very readily accessible for just the situation you encountered.
 My concern is that you didn't have sufficient hydraulic fluid to lower/lock
 the gear with the manual pump. I determined during construction that the
 pickup tube for the manual pump extended lower in the tank than the electric
 pump pickup, and just let it go at that. I did not test this at all.
 
 
 
 If you have any thoughts about why you didn't have enough fluid left to use
 the backup system, I'd be most appreciative. Could the pitch attitude of the
 aircraft had an effect? Other thoughts? Based on your experience, I'm
 thinking of draining down my system through the electric pump and then
 trying the manual pump. Like I said, I took this one on faith of the
 designer and did not test it, although it would have been easy to do during
 build.
 
 
 
 Again, nice job landing the aircraft, and I'm happy you sustained minimal
 damage in the process. Thanks especially for your comprehensive report. If
 you find more, especially about why the emergency pump didn't work, we'd all
 appreciate hearing.
 
 
 
 Bob Pastusek
 
For LOBO

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