AD 2007-04-19R1

AD Final Rules - 2007-04-19R1.pdf
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AD Number:
2007-04-19R1
Document Type:
AD Final Rules
Docket Number:
FAA-2006-25948
Subject Heading:
Airworthiness Directives; Superior Air Parts, Inc. (SAP), Cylinder Assemblies Part Numbers Series: SA47000L, SA47000S, SA52000, SA55000, SL32000W, SL3... ...Show more
Subject:
SAP cylinder assemblies
Status:
Current
Citation:
Federal Register: April 2, 2007 (Volume 72, Number 62)
Citation Publish Date:
04/02/2007
Effective Date:
05/07/2007
Make:
Lycoming Engines | Superior Air Parts, Inc. | Continental Motors
Model:
AEIO-320-D1B | AEIO-320-D2B | AEIO-320-E1A | AEIO-320-E1B | AEIO-320-E2A | AEIO-320-E2B | AEIO-360-B1B | AEIO-360-B1D ...Show more
Product Type:
Appliance
Product Subtype:
Affected AD:
Superseded AD:
2007-04-19
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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1


[Federal Register: April 2, 2007 (Volume 72, Number 62)]


[Rules and Regulations]


[Page 15603-15613]


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


[DOCID:fr02ap07-4]


–––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2006-25948; Directorate Identifier 2006-NE-32-AD; Amendment 39-15005;


AD 2007-04-19R1]


RIN 2120-AA64


Airworthiness Directives; Superior Air Parts, Inc. (SAP), Cylinder Assemblies Part Numbers


Series: SA47000L, SA47000S, SA52000, SA55000, SL32000W, SL32000WH, SL32006W,


SL36000TW, SL36000W, and SL36006W


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


ACTION:
 
Final rule; request for comments.


–––––––––––––––––––––––––––––––––––


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


assemblies installed in Teledyne Continental Motors (TCM) 470, 520, and 550 series reciprocating


engines, Lycoming Engines (LE) 320, 360, and 540 series reciprocating engines, Avco Lycoming


(AL) 540 series reciprocating engines, and Superior Air Parts, Inc. (SAP) 360 series reciprocating


engines. That AD currently requires removing from service certain SAP part numbered (P/N)


cylinder assemblies installed in TCM, LE, and AL reciprocating engines. That AD also requires


removing from service certain cylinder assemblies installed as original equipment in SAP


reciprocating engines, or in certain overhauled or repaired SAP reciprocating engines.


This AD continues to require those same actions. This AD results from comments from the


Public on the existing AD. We are issuing this AD to prevent cylinder separation that can lead to


engine failure, a possible engine compartment fire, and damage to the airplane.


DATES:
 
Effective May 7, 2007.


We must receive any comments on this AD by June 1, 2007.


ADDRESSES:
 
Use one of the following addresses to comment on this proposed 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 20590-0001.


•
 
Fax: (202) 493-2251.
2


•
 
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.


You may examine the comments on this AD in the AD docket on the Internet at


http://dms.dot.gov.


FOR FURTHER INFORMATION CONTACT:
 
Jurgen Priester, Aerospace Engineer, Special


Certification Office, FAA, Rotorcraft Directorate, Southwest Regional Headquarters, 2601 Meacham


Blvd., Fort Worth, Texas 76137; e-mail: Jurgen.E. Priester@faa.gov; telephone (817) 222-5159; fax


(817) 222-5785.


SUPPLEMENTARY INFORMATION:
 
On February 13, 2007, the FAA issued AD 2007-04-19,


Amendment 39-14951 (72 FR 8089, February 23, 2007). That AD requires removing from service


certain installed SAP cylinder assemblies, listed in that AD by P/N and serial number (SN), no later


than 150 hours total time-in-service (TIS) to preclude cylinder head fatigue failure and separation at


the head-to-barrel threaded interface. That AD was the result of nine separated SAP cylinder


assemblies in TCM reciprocating engines and one in a LE reciprocating engine. That condition, if not


corrected, could result in cylinder separation that can lead to engine failure, a possible engine


compartment fire, and damage to the airplane.


Actions Since We Issued AD 2007-04-19


Since we issued AD 2007-04-19, we received comments that cause us to better define and reduce


the applicability of this AD.


Comments


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


considered the comments received.


Request To Provide a Range of Dates That SAP Manufactured the Suspect Cylinders


A number of commenters ask us to include the date range when SAP manufactured the cylinders.


The commenters state that including the range of dates will help users to determine if they need to


investigate further and will eliminate unnecessary time and money spent to determine if a suspect


cylinder assembly is installed on their engine.


We agree. We changed the applicability to provide a date range to help narrow the applicability.


Also, we clarified the SN range to narrow the applicability even further.


Minor Editorial Changes


We included some minor editorial changes in this AD to clarify some nomenclature.


Conclusion


We have carefully reviewed the available data, including the comments received, and determined


that air safety and the public interest require adopting the AD with the changes described previously.


We have determined that these changes will neither increase the economic burden on any operator


nor increase the scope of the AD.