AD 94-01-10 R2

AD Final Rules - 94-01-10R2.pdf
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AD Number:
94-01-10 R2
Document Type:
AD Final Rules
Docket Number:
FAA-2005-20009
Subject Heading:
Airworthiness Directives; Boeing Model 757-200 and -200PF Series Airplanes
Subject:
Engine thrust reverser system
Status:
Current
Citation:
(Federal Register: January 13, 2005 (Volume 70, Number 9))
Citation Publish Date:
01/13/2005
Effective Date:
01/28/2005
Make:
The Boeing Company
Model:
757-200 Series | 757-200PF Series
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
94-01-10 R1
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register: January 13, 2005 (Volume 70, Number 9)]


[Rules and Regulations]


[Page 2330-2333]


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


[DOCID:fr13ja05-3]


–––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2005-20009; Directorate Identifier 2003-NM-220-AD; Amendment 39-13937;


AD 94-01-10 R2]


RIN 2120-AA64


Airworthiness Directives; Boeing Model 757-200 and -200PF Series Airplanes


AGENCY:
 
Federal Aviation Administration (FAA), DOT.


ACTION:
 
Final rule; request for comments.


–––––––––––––––––––––––––––––––––––


SUMMARY:
 
The FAA is revising an existing airworthiness directive (AD) for certain Boeing


Model 757-200 and -200PF series airplanes. That AD currently requires inspections, adjustments, and


functional checks of the engine thrust reverser system; and modification of the engine thrust reverser


directional control valve. That AD also requires installation of an additional thrust reverser locking


feature and periodic functional tests of the locking feature following installation. This new AD retains


the requirements of the existing AD, but removes certain tests and inspections for certain airplanes.


This AD is prompted by a determination of an error in the existing AD. We are issuing this AD to


prevent deployment of a thrust reverser in flight and subsequent reduced controllability of the


airplane.


DATES:
 
Effective January 28, 2005.


The incorporation by reference of certain publications, as listed in the regulations, was approved


by the Director of the Federal Register as of March 3, 1994 (59 FR 4558, February 1, 1994).


The incorporation by reference of certain other publications, as listed in the regulations, was


approved previously by the Director of the Federal Register as of September 16, 1991 (56 FR 46725,


September 16, 1991).


We must receive comments on this AD by March 14, 2005.


ADDRESSES:
 
Use one of the following addresses to submit comments on this AD.


•
 
DOT Docket Web site: Go to
 
http://dms.dot.gov
 
and follow the instructions for sending your


comments electronically.


•
 
Government-wide rulemaking Web site: Go to
 
http://www.regulations.gov
 
and follow the


instructions for sending your comments electronically.


•
 
Mail: Docket Management Facility; U.S. Department of Transportation, 400 Seventh Street


SW., Nassif Building, Room PL-401, Washington, DC 20590.
2


•
 
Fax: (202) 493-2251.


•
 
Hand Delivery: Room PL-401 on the plaza level of the Nassif Building, 400 Seventh Street


SW., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal


holidays.


For service information identified in this AD, contact Boeing Commercial Airplanes, P.O. Box


3707, Seattle, Washington 98124-2207. You can examine this information at the National Archives


and Records Administration (NARA). For information on the availability of this material at NARA,


call (202) 741-6030, or go to


http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html
.


You can examine the contents of this 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., room PL-401, on the plaza level of the Nassif Building, Washington, DC. This docket number


is FAA-2005-20009; the directorate identifier for this docket is 2003-NM-220-AD.


Examining the Docket


You can examine the 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 DOT street address stated in the ADDRESSES section. Comments


will be available in the AD docket shortly after the DMS receives them.


FOR FURTHER INFORMATION CONTACT:
 
Thomas S. Thorson, Aerospace Engineer,


Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW.,


Renton, Washington 98055-4056; telephone (425) 917-6508; fax (425) 917-6590.


SUPPLEMENTARY INFORMATION:
 
On August 7, 2003, we issued AD 94-01-10 R1,


amendment 39-13247 (68 FR 48546, August 14, 2003). That AD applies to certain Boeing Model


757-200 and -200PF series airplanes. That AD requires inspections, adjustments, and functional


checks of the engine thrust reverser system; and modification of the engine thrust reverser directional


control valve. That AD also requires installation of an additional thrust reverser locking feature and


periodic functional tests of the locking feature following installation. That AD was prompted by a


determination that the applicability of AD 94-01-10, amendment 39-8792 (59 FR 4558, February 1,


1994), should be limited to Boeing Model 757-200 and -200PF series airplanes equipped with Pratt


and Whitney PW2000 series engines. The actions specified in the AD are intended to prevent


deployment of a thrust reverser in flight and subsequent reduced controllability of the airplane.


Actions Since AD Was Issued


We have since determined that paragraph (c) of AD 94-01-10 R1 should be revised to apply only


to airplanes with line numbers 441 and lower. That AD applies to Boeing Model 757 series airplanes


with Pratt & Whitney PW2000 series engines. The airplanes in that AD are divided into two groups:


•
 
Airplanes without a thrust reverser sync lock (airplane line numbers 1 through 441 inclusive);


and


•
 
Airplanes with changes to the sync lock installation done in production (airplane line numbers


442 and subsequent).


When we issued that AD, we made changes as a result of comments we received. One of the


changes was to change paragraph (d) to apply only to airplanes without a thrust reverser sync lock


installed in production. The action in paragraph (d) (installing the thrust reverser sync lock) is