AD 99-27-16 R1

AD Final Rules - 992716R1.pdf
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AD Number:
99-27-16 R1
Document Type:
AD Final Rules
Docket Number:
99-NE-39-AD
Subject Heading:
Airworthiness Directives; CFE Company Model CFE738-1-1B Turbofan Engines
Subject:
Aft cooling plates
Status:
Current
Citation:
Federal Register: June 28, 2002 (Volume 67, Number 125)
Citation Publish Date:
06/28/2002
Effective Date:
08/02/2002
Make:
CFE Company
Model:
CFE738-1-1B
Product Type:
Engine
Product Subtype:
Affected AD:
Superseded AD:
99-27-16
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register: June 28, 2002 (Volume 67, Number 125)]


[Rules and Regulations]


[Page 43528-43530]


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


[DOCID:fr28jn02-3]


–––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. 99-NE-39-AD; Amendment 39-12791; AD 99-27-16R1]


RIN 2120-AA64


Airworthiness Directives; CFE Company Model CFE738-1-1B Turbofan Engines


AGENCY:
 
Federal Aviation Administration, DOT.


ACTION:
 
Final rule.


–––––––––––––––––––––––––––––––––––


SUMMARY:
 
This amendment revises an existing airworthiness directive (AD), that is applicable to


CFE Company Model CFE738-1-1B turbofan engines. That AD currently requires a one-time visual


inspection of stage 2 high pressure turbine (HPT) aft cooling plates for nicks, dents, raised metal, and


scratches, and if necessary, repair of the cooling plates or replacement with serviceable parts. This


amendment reduces the number of stage 2 HPT aft cooling plates affected by AD 99-27-16, and


identifies the applicable engines by engine serial numbers (SN's). This amendment is prompted by an


updated alert service bulletin (ASB) that reduces the number of stage 2 HPT aft cooling plates


affected by AD 99-27-16 and identifies the applicable engines by engine SN's. The actions specified


by this AD are intended to prevent stage 2 HPT aft cooling plate failure, which could result in an


uncontained engine failure and damage to the airplane.


DATES:
 
Effective date August 2, 2002. The incorporation by reference of certain publications listed


in the regulations is approved by the Director of the Federal Register as of August 2, 2002.


ADDRESSES:
 
The service information referenced in this AD may be obtained from CFE Company,


Data Distribution, MS 64-03/2101-201, PO Box 29003, Phoenix, AZ 85038-9003; telephone (602)


365-2493, fax (602) 365-5577. This information may be examined, by appointment, at the Federal


Aviation Administration (FAA), New England Region, Office of the Regional Counsel, 12 New


England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol


Street, NW., suite 700, Washington, DC.


FOR FURTHER INFORMATION CONTACT:
 
Keith Mead, Aerospace Engineer, Engine


Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park,


Burlington, MA 01803-5299; telephone: (781) 238-7744; fax: (781) 238-7199.
2


SUPPLEMENTARY INFORMATION:
 
A proposal to amend part 39 of the Federal Aviation


Regulations (14 CFR part 39) by revising AD 99-27-16, Amendment 39-11497 (65 FR 691, January


6, 2000), which is applicable to CFE Company model CFE738-1-1B turbofan engines, was published


in the Federal Register on June 6, 2001 (66 FR 30341). That action proposed to reduce the number of


stage 2 HPT aft cooling plates affected by AD 99-27-16, and identifies the applicable engines by


engine SN's, in accordance with CFE Company Alert Service Bulletin (ASB) No. CFE738-A72-


8031, Revision 2, dated October 17, 2000. Since the proposal was published, CFE Company has


issued ASB No. CFE738-A72-8031, Revision 4, dated March 27, 2002, which includes the engine


SN's that have the affected gas generator modules installed. This final rule references ASB Revision


4 instead of ASB Revision 2 which was referenced in the proposal.


Comments


Interested persons have been afforded an opportunity to participate in the making of this


amendment. No comments were received on the proposal or the FAA's determination of the cost to


the public. After careful review of the available data, including the ASB reference change noted


above, the FAA has determined that air safety and the public interest require the adoption of the rule


with the change described previously. The FAA has determined that this change will neither increase


the economic burden on any operator nor increase the scope of the AD.


Economic Analysis


There are approximately ten engines of the affected design in the worldwide fleet. The FAA


estimates that ten engines installed on airplanes of US registry would be affected by this AD, that it


would take approximately four work hours per engine to accomplish the inspection if the inspection


did not take place during scheduled maintenance, and that the average labor rate is $60 per work


hour. Required parts would cost approximately $1,536 per engine. Based on these figures, the total


cost of the AD on US operators is estimated to be $17,760.


Regulatory Analysis


This final rule does not have federalism implications, as defined in Executive Order 13132,


because it would not have a substantial direct effect on the States, on the relationship between the


national government and the States, or on the distribution of power and responsibilities among the


various levels of government. Accordingly, the FAA has not consulted with state authorities prior to


publication of this final rule.


For the reasons discussed above, I certify that this action (1) is not a ''significant regulatory


action'' under Executive Order 12866; (2) is not a ''significant rule'' under the DOT Regulatory


Policies and Procedures (44 FR 11034, February 26, 1979); and (3) will not have a significant


economic impact, positive or negative, on a substantial number of small entities under the criteria of


the Regulatory Flexibility Act. A final evaluation has been prepared for this action and it is contained


in the Rules Docket. A copy of it may be obtained by contacting the Rules Docket at the location


provided under the caption ADDRESSES.


List of Subjects in 14 CFR Part 39


Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.