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ACRO E-mail Archive Thread: [Acro] Re: Pitts "H" tube?

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ACRO E-mail Archive Thread: [Acro] Re: Pitts "H" tube?


Thread: [Acro] Re: Pitts "H" tube?

Message: [Acro] Re: Pitts "H" tube?

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From: "Herman Dierks" <hdierks at>

Date: Mon, 18 Feb 2002 02:33:04 UTC


  Call Aviat  (Pitts factory) and ask for a copy of the Service Bulletin's.

The H tube you refer to is SB number 14, dated 5-15-80.
Where the Horizontal Stab. attaches to the airframe at the forward edge of
the HS, it slides over and bolts to this H tube (if you want to call it
 The newer tube is now a tube in a tube so you can tell the new one by the
fish mouth weld near the edge of the fuselage where the HS attaches.   The
tubing is also thicker.
 This part is not difficult to replace, but does require removal of each
half of the HS. 
 New PN is 1-210-166  (replaces part 1-210-126).
 If it is a factory part, you should be able to see the PN stamped on it,
which would be seen inside the fuselage using a mirror. 

The control stick is SB number 15, dated Aug 25 1984.

Regards, Herman

> From: Klusmanp at
> To: acro at
> Subject: [Acro] Pitts "H" tube?
> Date: Sunday, February 17, 2002 12:24 AM
> Dear Pitts Gurus:
> I've seen talk of an "H" tube on Pitts aircraft that often needs
> What part of the aircraft is this and what do I need to look out for as I

> shop for a Pitts S-1S regarding this "H" tube?
> Also what do I look out for regarding the control stick. I have seen
> of a requirement to check for cracks and a fix for this.
> Thanks again!
> Paul Klusman
> P.S. Thanks again for all the folks who responded to my "Pitts groundloop

> damage" question. I looked at the plane in question tonight and I'll
> not buy it. I think the plane is in good shape but not quite as good 
> cosmetically as I'd like.


© Dr. Günther Eichhorn
Email Guenther Eichhorn