[Federal Register: October 1, 2004 (Volume 69, Number 190)]
[Rules and Regulations]
[Page 58826-58828]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr01oc04-6]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2003-NE-35-AD; Amendment 39-13806; AD 2004-20-01]
RIN 2120-AA64
Airworthiness Directives; Pratt & Whitney Canada Models PW123,
PW123B, PW123C, PW123D, PW123E, PW123AF, PW124B, PW125B, PW126A, PW127,
PW127E, PW127F, and PW127G Turboprop Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
Pratt & Whitney Canada (PWC) models PW123, PW123B, PW123C, PW123D,
PW123E, PW123AF, PW124B, PW125B, PW126A, PW127, PW127E, PW127F, and
PW127G turboprop engines. This AD requires initial and repetitive gap
inspections of the bypass valve cover, on certain part number (P/N)
mechanical fuel controls (MFCs), and replacement of those MFCs as
mandatory terminating action to the repetitive inspections. This AD is
prompted by sixteen reports of loss of engine throttle response and
overspeed, eight of which resulted in in-flight shutdown. We are
issuing this AD to prevent loss of throttle response and overspeed,
resulting in engine in-flight shutdown.
DATES: This AD becomes effective November 5, 2004. The Director of the
Federal Register approved the incorporation by reference of certain
publications listed in the regulations as of November 5, 2004.
ADDRESSES: You can get the service information identified in this AD
from Honeywell Engines & Systems, Technical Publications Department,
111 South 34th Street, Phoenix, Arizona 85034; telephone (602) 365-
5535; fax (602) 365-5577.
You may examine the AD docket at the FAA, New England Region,
Office of the Regional Counsel, 12 New England Executive Park,
Burlington, MA. You may examine the service information, at
[[Page 58827]]
the FAA, New England Region, Office of the Regional Counsel, 12 New
England Executive Park, Burlington, MA; or 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
.
FOR FURTHER INFORMATION CONTACT: Ian Dargin, Aerospace Engineer, Engine
Certification Office, FAA, Engine and Propeller Directorate, 12 New
England Executive Park, Burlington, MA 01803-5299; telephone (781) 238-
7178; fax (781) 238-7199.
SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39
with a proposed AD. The proposed AD applies to PWC models PW123,
PW123B, PW123C, PW123D, PW123E, PW123AF, PW124B, PW125B, PW126A, PW127,
PW127E, PW127F, and PW127G turboprop engines. We published the proposed
AD in the Federal Register on December 10, 2003 (68 FR 68802). That
action proposed to require initial and repetitive gap inspections of
the bypass valve cover, on certain part number (P/N) mechanical fuel
controls (MFCs), and replacement of those MFCs as mandatory terminating
action to the repetitive inspections.
Examining the AD Docket: You may examine the AD Docket (including
any comments and service information), by appointment, between 8 a.m.
and 4:30 p.m., Monday through Friday, except Federal holidays. See
ADDRESSES for the location.
Comments
We provided the public the opportunity to participate in the
development of this AD. We received no comments on the proposal 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
There are about 2,800 PWC models PW123, PW123B, PW123C, PW123D,
PW123E, PW123AF, PW124B, PW125B, PW126A, PW127, PW127E, PW127F, and
PW127G turboprop engines of the affected design in the worldwide fleet.
We estimate that 473 engines installed on airplanes of U.S. registry
will be affected by this AD. We also estimate that it will take about
0.1 work hour per engine to perform the inspection, about 1 work hour
per engine to replace the MFC during maintenance, and that the average
labor rate is $65 per work hour. Required parts will cost about $72,000
per engine. Based on these figures, we estimate the total cost of the
AD to U.S. operators to be $34,089,819. The manufacturer has stated
that it may provide the new design MFCs at no cost to operators, and
that if the MFC is replaced at shop visit, no additional labor costs
will be incurred.
Regulatory Findings
We have determined that this AD will not have federalism
implications under Executive Order 13132. This AD will 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.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866;
(2) Is not a ``significant rule'' under 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.
We prepared a summary of the costs to comply with this AD and
placed it in the AD Docket. You may get a copy of this summary by
sending a request to us at the address listed under ADDRESSES. Include
``AD Docket No. 2003-NE-35-AD'' in your request.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
0
Accordingly, under the authority delegated to me by the Administrator,
the Federal Aviation Administration amends 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive (AD):
2004-20-01 Pratt & Whitney Canada: Amendment 39-13806. Docket No.
2003-NE-35-AD.
Effective Date
(a) This AD becomes effective November 5, 2004.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Pratt & Whitney Canada (PWC) models
PW123, PW123B, PW123C, PW123D, PW123E, PW123AF, PW124B, PW125B,
PW126A, PW127, PW127E, PW127F, and PW127G turboprop engines, with
mechanical fuel controls (MFCs), part numbers (P/Ns) 3244841-21,
3244853-17, 3244855-15, 3244857-14, 3244858-23, 3244871-5, 3244873-
4, and 3244874-4, installed. These engines are installed on, but not
limited to, Aerospatiale ATR 42 and ATR 72, BAE Systems (Operations)
Limited ATP, Bombardier Inc. DHC-8-200 series, DHC-8-300 series, CL-
215T, and CL-415, Construcciones Aeronauticas, S.A. (CASA) C-295,
Fokker Aircraft B.V. F27 Mark 050, and Mark 060 airplanes.
Unsafe Condition
(d) This AD is prompted by sixteen reports of loss of engine
throttle response and overspeed, eight of which resulted in in-
flight shutdown. We are issuing this AD to prevent loss of throttle
response and overspeed, resulting in engine in-flight shutdown.
Compliance
(e) Compliance with this AD is required as indicated, unless
already done.
Initial Gap Inspection
(f) Within 500 hours time-in-service (TIS) after the effective
date of the AD, perform a gap inspection between the MFC bypass
valve cover and the MFC main body, and disposition the MFC. Follow
paragraphs 5.0 through 5.3 of Honeywell Service Information Bulletin
(SIB) No. 82, dated September 14, 2001, to do the inspection and MFC
disposition.
Repetitive Gap Inspections
(g) At intervals of 1,500 hours TIS from the last gap
inspection, perform repetitive gap inspections between the MFC
bypass valve cover and the MFC main body and disposition the MFC.
Follow paragraphs 5.0 through 5.3 of Honeywell SIB No. 82, dated
September 14, 2001, to do the inspection and MFC disposition.
Mandatory Terminating Action
(h) Within 4,500 hours TIS or 24 months from the effective date
of this AD, whichever occurs first, replace the MFC with an MFC not
having a P/N listed in paragraph (c) of this AD.
(i) Replacement of the MFC with an MFC whose P/N is not listed
in paragraph (c) of this AD constitutes mandatory terminating action
to the repetitive inspection requirements specified in paragraph (g)
of this AD. Information on new design replacement MFCs can be found
in PWC Service Bulletin No. PW100-72-21562, Revision 2, dated
December 7, 2000.
[[Page 58828]]
Material Incorporated by Reference
(j) You must use Honeywell Service Information Bulletin No. 82,
dated September 14, 2001, to perform the inspections required by
this AD. The Director of the Federal Register approved the
incorporation by reference of this service bulletin in accordance
with 5 U.S.C. 552(a) and 1 CFR part 51. You can get a copy from
Honeywell Engines & Systems, Technical Publications Department, 111
South 34th Street, Phoenix, Arizona 85034; telephone (602) 365-5535;
fax (602) 365-5577. You can review copies at FAA, New England
Region, Office of the Regional Counsel, 12 New England Executive
Park, Burlington, MA, or 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
.
Related Information
(k) None.
Issued in Burlington, Massachusetts, on September 24, 2004.
Francis A. Favara,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 04-21911 Filed 9-30-04; 8:45 am]
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