AD 2007-06-01 R1

AD Final Rules - 2007-06-01R1.pdf
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AD Number:
2007-06-01 R1
Document Type:
AD Final Rules
Docket Number:
FAA-2006-25105
Subject Heading:
Airworthiness Directives; Raytheon Aircraft Company Beech Models 45 (YT-34), A45 (T-34A, B-45), and ...Show more
Subject:
Front and rear horizontal stabilizer spars
Status:
Current
Citation:
(Federal Register: April 6, 2007 (Volume 72, Number 66))
Citation Publish Date:
04/06/2007
Effective Date:
04/16/2007
Make:
Textron Aviation Inc.
Model:
45 (Military YT-34) | A45 (Military T-34A, B-45) | D45 (Military T-34B)
Product Type:
Aircraft
Product Subtype:
Small Airplane
Affected AD:
Superseded AD:
2007-06-01
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register: April 6, 2007 (Volume 72, Number 66)]


[Rules and Regulations]


[Page 16990-16998]


From the Federal Register Online via GPO Access [wais.access.gpo.gov]


[DOCID:fr06ap07-3]


–––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2006-25105; Directorate Identifier 2006-CE-33-AD; Amendment 39-15016;


AD 2007-06-01 R1]


RIN 2120-AA64


Airworthiness Directives; Raytheon Aircraft Company Beech Models 45 (YT-34), A45 (T-34A,


B-45), and D45 (T-34B) Airplanes


AGENCY:
 
Federal Aviation Administration (FAA), DOT.


ACTION:
 
Final rule; correction.


–––––––––––––––––––––––––––––––––––


SUMMARY:
 
We are clarifying information contained in Airworthiness Directive (AD) 2007-06-01,


which supersedes AD 62-24-01 and applies to all Raytheon Aircraft Company (RAC) Beech Models


45 (YT-34), A45 (T-34A, B45), and D45 (T-34B) airplanes. AD 2007-06-01 currently requires you


to repetitively inspect, using the eddy current method, the front and rear horizontal stabilizer spars for


cracks and replace any cracked stabilizer. We inadvertently left out the language in this AD that


required replacement of any horizontal stabilizer spar found cracked prior to further flight although


the procedures in the appendix made reference to corrective action. The replacement information was


contained in the notice of proposed rulemaking (NPRM). This document adds this information


already proposed back into the AD. We are issuing this AD to prevent failure of the front and/or rear


horizontal stabilizer spars caused by fatigue cracks. This failure could result in stabilizer separation


and loss of control of the airplane.


DATES:
 
This AD becomes effective on April 16, 2007.


ADDRESSES:
 
To view the AD docket, go to the Docket Management Facility, U.S. Department of


Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401, Washington, DC 20590-


001 or on the Internet at
 
http://dms.dot.gov
. The docket number is FAA-2006-25105; Directorate


Identifier 2006-CE-33-AD.


FOR FURTHER INFORMATION CONTACT:
 
T.N. Baktha, Aerospace Engineer, FAA, Wichita


Aircraft Certification Office, 1801 Airport Road, Mid-Continent Airport, Wichita, Kansas 67209;


telephone: (316) 946-4155; fax: (316) 946-4107.


1
SUPPLEMENTARY INFORMATION:


Discussion


On March 5, 2007, we issued AD 2007-06-01, Amendment 39-14982 (72 FR 10909, March 12,


2007), to supersede AD 62-24-01. AD 2007-06-01 retained inspections of the front and rear


horizontal stabilizer spars for cracks, but changed the inspection method from the dye penetrant


method to the surface eddy current method.


We inadvertently left out the language in AD 2007-06-01 that required replacement of any


horizontal stabilizer spar found cracked prior to further flight although the procedures in the appendix


made reference to corrective action. The replacement information was contained in the NPRM.


Consequently, the FAA sees a need to clarify AD 2007-06-01 to assure that any cracked


horizontal stabilizer spar is replaced prior to further flight.


Correction of Publication


This document clarifies AD 2007-06-01 by incorporating the replacement language that was


proposed in the NPRM and adds the amendment to section 39.13 of the Federal Aviation Regulations


(14 CFR 39.13).


Since this action only clarifies the intent of what was originally proposed in the NPRM, it has no


adverse economic impact and imposes no additional burden on any person than was already


proposed. Therefore, the FAA has determined that prior notice and opportunity for public comment


are unnecessary.


List of Subjects in 14 CFR Part 39


Air transportation, Aircraft, Aviation safety, Safety.


Adoption of the Amendment


Accordingly, under the authority delegated to me by the Administrator, the Federal Aviation


Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows:


PART 39–AIRWORTHINESS DIRECTIVES


1. The authority citation for part 39 continues to read as follows:


Authority: 49 U.S.C. 106(g), 40113, 44701.


§ 39.13 [Amended]


2. The FAA amends § 39.13 by removing Airworthiness Directive (AD) 2007-06-01, Amendment


39-14982 (72 FR 10909, March 12, 2007), and adding the following new AD:


2