AD 2006-07-18

AD Final Rules - 2006-07-18.pdf
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AD Number:
2006-07-18
Document Type:
AD Final Rules
Docket Number:
FAA-2006-23674
Subject Heading:
Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120, -120ER, -1...Show more
Subject:
Elevator control surface
Status:
Current
Citation:
Federal Register: April 7, 2006 (Volume 71, Number 67)
Citation Publish Date:
04/07/2006
Effective Date:
05/12/2006
Make:
Embraer - Empresa Brasileira de Aeronautica S.A.
Model:
EMB-120 | EMB-120ER | EMB-120FC | EMB-120QC | EMB-120RT
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register: April 7, 2006 (Volume 71, Number 67)]


[Rules and Regulations]


[Page 17698-17699]


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


[DOCID:fr07ap06-4]


–––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2006-23674; Directorate Identifier 2005-NM-234-AD; Amendment 39-14545;


AD 2006-07-18]


RIN 2120-AA64


Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-


120, -120ER, -120FC, -120QC, and -120RT Airplanes


AGENCY:
 
Federal Aviation Administration (FAA), Department of Transportation (DOT).


ACTION:
 
Final rule.


–––––––––––––––––––––––––––––––––––


SUMMARY:
 
The FAA is adopting a new airworthiness directive (AD) for certain Empresa


Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120, -120ER, -120FC, -120QC, and -


120RT airplanes. This AD requires a one-time inspection of the interior of the internal elevator


torque tube of each elevator control surface for oxidation and corrosion, and corrective actions. This


AD results from corrosion in torque tubes of the elevators found during scheduled maintenance. We


are issuing this AD to detect and correct corrosion in the torque tubes of the elevators, which could


lead to an unbalanced elevator and result in reduced controllability of the airplane.


DATES:
 
This AD becomes effective May 12, 2006.


The Director of the Federal Register approved the incorporation by reference of a certain


publication listed in the AD as of May 12, 2006.


ADDRESSES:
 
You may examine the AD docket on the Internet at
 
http://dms.dot.gov
 
or in person at


the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW.,


Nassif Building, Room PL-401, Washington, DC.


Contact Empresa Brasileira de Aeronautica S.A. (EMBRAER), P.O. Box 343–CEP 12.225, Sao


Jose dos Campos–SP, Brazil, for service information identified in this AD.


FOR FURTHER INFORMATION CONTACT:
 
Todd Thompson, Aerospace Engineer,


International Branch, ANM-116, Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW.,


Renton, Washington 98055-4056; telephone (425) 227-1175; fax (425) 227-1149.
2


SUPPLEMENTARY INFORMATION:


Examining the Docket


You may examine the airworthiness directive (AD) docket on the Internet at
 
http://dms.dot.gov


or in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through


Friday, except Federal holidays. The Docket Management Facility office (telephone (800) 647-5227)


is located on the plaza level of the Nassif Building at the street address stated in the ADDRESSES


section.


Discussion


The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include


an AD that would apply to certain Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model


EMB-120, -120ER, -120FC, -120QC, and -120RT airplanes. That NPRM was published in the


Federal Register on January 25, 2006 (71 FR 4075). That NPRM proposed to require a one-time


inspection of the interior of the internal elevator torque tube of each elevator control surface for


oxidation and corrosion, and corrective actions.


Comments


We provided the public the opportunity to participate in the development of this AD. We


received no comments on the NPRM or on the determination of the cost to the public.


Conclusion


We have carefully reviewed the available data and determined that air safety and the public


interest require adopting the AD as proposed.


Costs of Compliance


This AD will affect about 108 airplanes of U.S. registry. The required actions will take about 3


work hours per airplane, at an average labor rate of $65 per work hour. Based on these figures, the


estimated cost of this AD for U.S. operators is $21,060, or $195 per airplane.


Authority for This Rulemaking


Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety.


Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation


Programs, describes in more detail the scope of the Agency's authority.


We are issuing this rulemaking under the authority described in subtitle VII, part A, subpart III,


section 44701, ''General requirements.'' Under that section, Congress charges the FAA with


promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices,


methods, and procedures the Administrator finds necessary for safety in air commerce. This


regulation is within the scope of that authority because it addresses an unsafe condition that is likely


to exist or develop on products identified in this rulemaking action.