[Federal Register Volume 71, Number 149 (Thursday, August 3, 2006)]
[Rules and Regulations]
[Pages 43964-43967]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-12420]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2004-NE-10-AD; Amendment 39-14704; AD 2006-16-04]
RIN 2120-AA64
Airworthiness Directives; Rolls-Royce Corporation (Formerly
Allison Engine Company, Allison Gas Turbine Division, and Detroit
Diesel Allison) (RRC) 250-B and 250-C Series Turboshaft and Turboprop
Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is superseding an existing airworthiness directive
(AD) for RRC 250-B and 250-C series turboshaft and turboprop engines.
That AD currently requires a onetime inspection of the fuel nozzle
screen for contamination, and if contamination is found, inspection and
cleaning of the entire aircraft fuel system before further flight. That
AD also requires replacing the fuel nozzle with a new design fuel
nozzle, at the next fuel nozzle overhaul or by June 30, 2006, whichever
occurs first. This AD requires the same actions, but would add
additional part numbers (P/Ns) to the list of affected fuel nozzles.
This AD would also explain that the existing AD, as worded, allows
certain part number (P/N) fuel nozzles back into service. Those fuel
nozzles must not be allowed back into service. This AD is prompted by
the discovery that several P/Ns of fuel nozzles were inadvertently left
out of AD 2004-24-09. We are issuing this AD to minimize the risk of
sudden loss of engine power and uncommanded shutdown of the engine due
to fuel contamination and collapse of the screen in the fuel nozzle.
DATES: This AD becomes effective September 7, 2006.
ADDRESSES: You may examine the AD docket at the FAA, New England
Region, Office of the Regional Counsel, 12 New England Executive Park,
Burlington, MA.
FOR FURTHER INFORMATION CONTACT: John Tallarovic, Aerospace Engineer,
Chicago Aircraft Certification Office, FAA, 2300 East Devon Avenue, Des
Plaines, IL 60018-4696; telephone (847) 294-8180; fax (847) 294-7834.
SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39
with a proposed airworthiness directive (AD). The proposed AD applies
to RRC 250-B and 250-C series turboshaft and turboprop engines. We
published the proposed AD in the Federal Register on October 18, 2005
(70 FR 60453). That action proposed to require a onetime inspection of
the fuel nozzle screen for contamination, and if contamination is
found, inspection and cleaning of the entire aircraft fuel system
before further flight. That AD also proposed to require replacing the
fuel nozzle with a new design fuel nozzle, at the next fuel nozzle
overhaul.
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 have considered the comments received.
Listing of Rule in DMS
One commenter believes that we should have listed the proposed
action in ``dms''. We do not agree. Although the commenter did not
define ``dms,'' the only relevant system is the Docket Management
System (DMS). When we began this proposed rule early in 2004, we were
not using the DMS and we could not list it in the system.
Change Goodrich Aerospace to Delavan
One commenter notes that Goodrich Aerospace acquired the company
with the Parts Manufacturer Approval (PMA) cited in the proposed AD
(Delavan) and suggests changing the name in the final rule. We agree
and have changed the name to Goodrich Delavan (Delavan was misspelled
in the proposed rule.)
Combine Tables 3 and 4
One commenter requests we combine Tables 3 and 4. The commenter
believes that the nozzles listed in Table 3 manufactured under the PMA,
which require an inspection within 50 operating hours, should be
treated in the same manner as the nozzles listed in Table 4, which do
not require an inspection until 150 operating hours. We do not agree.
Operators have already inspected the nozzles listed in Table 4 under
the requirements of AD 2004-24-09. After we published that AD, we found
that we omitted some fuel nozzle part numbers from the list of parts
requiring inspection. This proposed rule adds those omitted part
numbers and includes both Rolls-Royce Corporation and PMA parts.
Because we omitted these parts from AD 2004-24-09, operators have not
inspected them yet.
[[Page 43965]]
Based on that, we intentionally shortened the compliance time for
inspecting them. We have not changed this AD.
Correct Applicability Errors
One commenter asks that we correct errors and omissions in the
listing of aircraft models on which the affected engines are installed
in Table 2. We agree and we have corrected this information in Table 2
and in the Applicability.
Change in Required Compliance Time
We have changed the compliance time required in paragraph (h) of
the proposed rule from, ``At the next fuel nozzle overhaul after the
effective date of this AD, or by June 30, 2006, whichever occurs first
* * *'', to ``At the next fuel nozzle overhaul after the effective date
of this AD * * *'', because the June 30, 2006 date has past.
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.
Costs of Compliance
We estimate that this AD will affect 10,000 engines installed on
aircraft of U.S. registry. We also estimate that it will take about one
work-hour per engine to perform the required actions, and that the
average labor rate is $65 per work-hour. In addition, operators can
either replace the fuel nozzle with a new one at a cost of about $2,595
or have the existing nozzle overhauled at a cost of about $850. We
estimate that about 80 percent of the fuel nozzles will be overhauled
and 20 percent will be replaced with a new nozzle. Therefore, we
estimate that the required parts will cost, on average, about $1,200
per engine. Based on these figures, we estimate the total cost of the
AD to U.S. operators to be $12,650,000.
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.
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. 2004-NE-10-AD'' in your request.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
Adoption of the Amendment
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 removing Amendment 39-13885 (69 FR
69807, December 1, 2004) and by adding a new airworthiness directive,
Amendment 39-14704, to read as follows:
2006-16-04 Rolls-Royce Corporation (formerly Allison Engine Company,
Allison Gas Turbine Division, and Detroit Diesel Allison): Amendment
39-14704. Docket No. 2004-NE-10-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective
September 7, 2006.
Affected ADs
(b) This AD supersedes AD 2004-24-09, Amendment 39-13885.
Applicability
(c) This AD applies to Rolls-Royce Corporation (formerly Allison
Engine Company, Allison Gas Turbine Division, and Detroit Diesel
Allison) (RRC) 250-B and 250-C series turboshaft and turboprop
engines in the following Table 1:
Table 1.--250-B and 250-C Series Turboshaft and Turboprop Engines
Affected
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-B15A
-B15E
-B15G
-B17
-B17B
-B17C
-B17D
-B17E
-B17F
-B17F/1
-B17F/2
-C10
-C10B
-C10D
-C18
-C18A
-C18B
-C18C
-C20
-C20B
-C20C
-C20F
-C20J
-C20R
-C20R/1
-C20R/2
-C20R/4
-C20S
-C20W
-C28
-C28B
-C28C
-C30
-C30G
-C30G/2
-C30M
-C30P
-C30R
-C30R/1
-C30R/3
-C30R/3M
-C30S
-C30U
-C40B
-C47B
-C47M
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These engines are installed on, but not limited to, the aircraft
listed in the following Table 2:
[[Page 43966]]
Table 2.--Engines Installed on, But Not Limited To
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Manufacturer Model
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AeroSpace Technologies of Australia Pty N22B, N22S, and N24A.
Ltd.
Agusta................................. A109, A109A, A109AII, and
A109C.
Arrow Falcon Exporters................. OH-58A, OH-58A+, and OH-58C.
Bell Helicopter Textron................ 206A, 206A-1, 206B, 206L, 206L-
1, 206L-3, 206L-4, 230, 407,
and 430.
B-N Group.............................. BN-2T and BN-2T-4R.
Enstrom Helicopter..................... TH28, 480; and 480B.
Eurocopter Canada Limited.............. BO 105 LS A-3.
Eurocopter Deutschland................. BO-105A, BO-105C, BO-105LS A-1,
and BO-105S.
Eurocopter France...................... AS355E, AS355F, AS355I, and
AS355F2.
FH-1100 Manufacturing Corporation...... 100, 420, and MX-7-420A.
Garlick Helicopters.................... OH-58A, OH-58A+, OH-58C; Maule
zm-7-420A, MT-7-420, MX-7-420,
MX-7-420A.
MD Helicopters Inc..................... 369, 369A, 369D, 369E, 369F,
369FF, 369H, 369HE, 369HM,
369HS, 500N, and 600N.
San Joaquin Helicopters................ OH-58A, OH-58A+, and OH-58C.
Schweizer.............................. TH269D.
SIAI Marchetti s.r.l................... SF600 and SF600A.
Sikorsky Aircraft Corporation.......... S-76A.
Vulcanair S.p.A........................ AP68TP 300, and AP68TP 600.
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Unsafe Condition
(d) This AD is prompted by the discovery that several part
numbers (P/Ns) of fuel nozzles were inadvertently left out of AD
2004-24-09. That AD, as worded, allows certain P/N fuel nozzles back
into service. Those fuel nozzles must not be allowed back into
service. We are issuing this AD to minimize the risk of sudden loss
of engine power and uncommanded shutdown of the engine due to fuel
contamination and collapse of the screen in the fuel nozzle.
Compliance
(e) You are responsible for having the actions required by this
AD performed within the compliance times specified unless the
actions have already been done.
(f) Perform a onetime inspection of the screens in fuel nozzles
as follows:
(1) For fuel nozzles with a P/N listed in Table 3 of this AD,
inspect the screen for contamination within 50 operating hours after
the effective date of this AD.
Table 3.--Fuel Nozzles To Be Inspected Within 50 Operating Hours
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Corresponding
Manufacturer P/N RRC vendor P/N
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RRC..................................... 6874959 5232815
6894610 5233465
6898531 5233585
Goodrich Delavan (Parts Manufacturer 47069 N/A
Approval (PMA))........................ 47101 N/A
49445 N/A
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(2) For fuel nozzles with a P/N listed in Table 4 of this AD,
inspect the screen for contamination within 150 operating hours
after January 5, 2005.
Table 4.--Fuel Nozzles To Be Inspected Within 150 Operating Hours
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Corresponding
Manufacturer P/N RRC vendor P/N
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RRC..................................... 6852020 5232480
6890917 5233333
6899001 5233600
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(g) If you find contamination on the screen, inspect and clean
the entire aircraft fuel system before further flight.
(h) At the next fuel nozzle overhaul after the effective date of
this AD, do the following:
(1) Remove from service fuel nozzles listed in Table 3 and Table
4 of this AD.
(2) Replace with a serviceable fuel nozzle.
Definition
(i) For the purposes of this AD, a serviceable fuel nozzle is
defined as a nozzle that has a P/N not specified in, or addressed
by, this AD.
Previous Credit
(j) Previous credit is given for onetime inspections of fuel
nozzles, RRC P/Ns 6852020, 6890917, and 6899001 using AD 2004-24-09.
Alternative Methods of Compliance
(k) The Manager, Chicago Aircraft Certification Office, has the
authority to approve alternative methods of compliance for this AD
if requested using the procedures found in 14 CFR 39.19.
[[Page 43967]]
Related Information
(l) Information related to the subject of this AD can be found
in Rolls-Royce Corporation Alert Commercial Engine Bulletins (CEBs),
all at Revision 1, and all dated August 30, 2004, listed in the
following Table 5:
Table 5.--Related Alert Commercial Engine Bulletins
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CEB-A-313............................. CEB-A-73-5029
CEB-A-73-2075......................... CEB-A-73-6041
CEB-A-1394............................ TP CEB-A-183
CEB-A-73-3118......................... TP CEB-A-1336
CEB-A-73-4056......................... TP CEB-A-73-2032
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Issued in Burlington, Massachusetts, on July 27, 2006.
Francis A. Favara,
Manager, Engine and Propeller Directorate, Aircraft Certification
Service.
[FR Doc. E6-12420 Filed 8-2-06; 8:45 am]
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