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ACRO E-mail Archive Thread: [IAC-L:107] NPRM for Pitts Longeron AD.


Thread: [IAC-L:107] NPRM for Pitts Longeron AD.

Message: [IAC-L:107] NPRM for Pitts Longeron AD.

Follow-Up To: ACRO Email list (for List Members only)

From: "Dr. Guenther Eichhorn" <gei at>

Date: Tue, 17 Jun 1997 20:47:41 UTC


Here is the proposed new AD for the Pitts longerons.  It would
remove the 25 hour inspections and require a marked g-meter
instead and a placard.  The text is available on the IAC Web
site at



[Federal Register: May 30, 1997 (Volume 62, Number 104)]
[Proposed Rules]               
[Page 29309-29312]
>From the Federal Register Online via GPO Access []



Federal Aviation Administration

14 CFR Part 39

[Docket No. 97-CE-17-AD]
RIN 2120-AA64

Airworthiness Directives; Aviat Aircraft Inc. Models S-2A, S-2B, 
and S-2S Airplanes (formerly Pitts Models S-2A, S-2B, and S-2S 

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of proposed rulemaking (NPRM).


SUMMARY: This document proposes to supersede Airworthiness Directive 
(AD) 96-09-08 R1 applicable to certain Aviat

[[Page 29310]]

Aircraft Inc. (Aviat) Models S-2A, S-2B, and S-2S airplanes, which 
currently requires repetitively inspecting the upper longerons just aft 
of the rear cabane struts for cracks and repairing any cracks found. 
The proposed action would retain the same actions as the current AD, 
lengthen the time interval between repetitive inspections, require 
either installing a marked accelerometer in order to continue to 
perform acrobatic maneuvers and installing a placard that specifies 
gravity (``g'') force limitations; or, installing a placard prohibiting 
acrobatic maneuvers; and, require inserting revisions into the Airplane 
Flight Manual (AFM). The proposed AD is prompted by reports of cracking 
in the upper longerons and the availability of an improved design 
modification that, when incorporated, reinforces the upper longeron 
area. The actions specified by the proposed AD are intended to prevent 
cracking and subsequent failure of the airframe, resulting in possible 
loss of control of the airplane.

DATES: Comments must be received on or before July 25, 1997.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Central Region, Office of the Assistant Chief 
Counsel, Attention: Rules Docket No. 97-CE-17-AD, Room 1558, 601 E. 
12th Street, Kansas City, Missouri 64106. Comments may be inspected at 
this location between 8 a.m. and 4 p.m., Monday through Friday, 
holidays excepted.
    Service information that applies to the proposed AD may be obtained 
from Aviat Aircraft Inc., The Airport-Box No. 1240, 672 South 
Washington Street, Afton, Wyoming, 83110; telephone (307) 886-3151; 
facsimile (307) 886-9674. This information also may be examined at the 
Rules Docket at the address above.

FOR FURTHER INFORMATION CONTACT: Roger Caldwell, Project Engineer, FAA, 
Denver Aircraft Certification Office, 26805 East 68th Ave., Room 214, 
Denver, Colorado 80216; telephone (303) 342-1086; facsimile (303) 342-


Comments Invited

    Interested persons are invited to participate in the making of the 
proposed rule by submitting such written data, views, or arguments as 
they may desire. Communications should identify the Rules Docket number 
and be submitted in triplicate to the address specified above. All 
communications received on or before the closing date for comments, 
specified above, will be considered before taking action on the 
proposed rule. The proposals contained in this notice may be changed in 
light of the comments received.
    Comments are specifically invited on the overall regulatory, 
economic, environmental, and energy aspects of the proposed rule. All 
comments submitted will be available, both before and after the closing 
date for comments, in the Rules Docket for examination by interested 
persons. A report that summarizes each FAA-public contact concerned 
with the substance of this proposal will be filed in the Rules Docket.
    Commenters wishing the FAA to acknowledge receipt of their comments 



© Dr. Günther Eichhorn
Email Guenther Eichhorn