[Federal Register Volume 71, Number 45 (Wednesday, March 8, 2006)]
[Proposed Rules]
[Pages 11546-11549]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-3260]
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Proposed Rules
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains notices to the public of
the proposed issuance of rules and regulations. The purpose of these
notices is to give interested persons an opportunity to participate in
the rule making prior to the adoption of the final rules.
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Federal Register / Vol. 71, No. 45 / Wednesday, March 8, 2006 /
Proposed Rules
[[Page 11546]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2006-23706; Directorate Identifier 2006-NE-03-AD]
RIN 2120-AA64
Airworthiness Directives; Honeywell International Inc. TPE331
Series Turboprop Engines
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for Honeywell International Inc. TPE331 series turboprop engines with
certain part numbers of Woodward fuel control assemblies installed.
This proposed AD would require initial and repetitive dimensional
inspections of the splines between the fuel pump and fuel control, for
wear or damage. This proposed AD would also require replacing those
fuel control assemblies with serviceable modified fuel control
assemblies with improved overspeed protection. This proposed AD results
from reports of loss of the drive between the fuel pump and fuel
control, leading to engine overspeed, overtorque, overtemperature,
uncontained rotor failure, and asymmetric thrust in multi-engine
airplanes. We are proposing this AD to prevent rapid, uncommanded,
uncontrolled increase in fuel flow to the engine, asymmetric thrust,
uncontained rotor failure, and damage to the airplane.
DATES: We must receive any comments on this proposed AD by May 8, 2006.
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.
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 can get the service information identified in this proposed AD
from Honeywell Engines, Systems & Services, Technical Data
Distribution, M/S 2101-201, P.O. Box 52170, Phoenix, AZ 85072-2170;
telephone: (602) 365-2493 (General Aviation); (602) 365-5535
(Commercial); fax: (602) 365-5577 (General Aviation and Commercial).
You may examine the comments on this proposed AD in the AD docket
on the Internet at http://dms.dot.gov.
FOR FURTHER INFORMATION CONTACT: Joseph Costa, Aerospace Engineer, Los
Angeles Aircraft Certification Office, FAA, Transport Airplane
Directorate, 3960 Paramount Blvd., Lakewood, CA 90712-4137; telephone
(562) 627-5246; fax (562) 627-5210.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send us any written relevant data, views, or
arguments regarding this proposal. Send your comments to an address
listed under ADDRESSES. Include ``Docket No. FAA-2006-23706;
Directorate Identifier 2006-NE-03-AD'' in the subject line of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of the proposed AD. We will
consider all comments received by the closing date and may amend the
proposed AD in light of those comments.
We will post all comments we receive, without change, to http://dms.dot.govROW including any personal information you provide. We will
also post a report summarizing each substantive verbal contact with FAA
personnel concerning this proposed AD. Using the search function of the
DOT Web site, anyone can find and read the comments in any of our
dockets, including the name of the individual who sent the comment (or
signed the comment on behalf of an association, business, labor union,
etc.). You may review the DOT's complete Privacy Act Statement in the
Federal Register published on April 11, 2000 (65 FR 19477-78) or you
may visit http://dms.dot.gov.
Examining the AD Docket
You may examine the docket that contains the proposal, any comments
received and, any final disposition in person at the DOT Docket Office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The Docket Office (telephone (800) 647-5227) is located on
the plaza level of the Department of Transportation Nassif Building at
the street address stated in ADDRESSES. Comments will be available in
the AD docket shortly after the Docket Management Facility receives
them.
Discussion
Within the past 30 years, we have received reports of 51 broken,
sheared, or excessively worn fuel pump/fuel control drive splines on
TPE331 series engines, which have resulted in operational anomalies
such as uncontrollable fuel flow, overtorques, or overspeeds. In 11 of
these reports, failed fuel pump drive shafts led to engine overspeed.
Five of those overspeed events caused a turbine wheel to separate.
While investigating the noted service events, we determined that
the loss of drive between the engine-driven fuel pump and the fuel
control governor system, results in a rapid, uncommanded, and
uncontrolled increase in engine fuel flow. The effects of fuel flow
increase could include overspeed, overtorque, overtemperature of the
engine, significant asymmetric thrust, inability to produce reverse
thrust, and uncontained separation of high speed rotating components.
This condition, if not corrected, could result in rapid, uncommanded,
uncontrolled increase in fuel flow to the engine, uncontained failure,
and damage to the aircraft.
This proposed AD would require initial and repetitive dimensional
inspections of the splines between the fuel pump and fuel control, for
wear or damage, and replacement of the fuel control if an unserviceable
condition
[[Page 11547]]
exists. The proposed AD would also require eventual replacement of
affected fuel controls with an improved fuel control, which better
accommodates drive spline failure by eliminating the overspeed
condition. This remove and replace requirement is a terminating action
to inspections for all installations. However, for the optional method
of compliance explained in paragraph (l), for agricultural operations,
removal and replacement is not required, as discussed below.
Agricultural operations at low altitude and heavy loads place
special demands on aircraft operating in that environment. For example,
high power and, therefore, high fuel flow, is necessary for an aircraft
engaged in agricultural spraying to avoid power lines, utility poles,
trees, and buildings (including silos). We consider a sudden power loss
or inability to maintain altitude close to the ground more hazardous
than managing an engine overspeed and overtorque event. Operations
other than agricultural operations, are not exposed to these hazards.
Therefore, we propose to allow continued use of existing fuel control
assemblies in agricultural operations, and control the rate of failure
with a repetitive inspection program for those limited number of
engines.
The Agency is committed to updating the aviation community of
expected costs associated with the MU-2B series airplane safety
evaluation conducted in 2005. As a result of that commitment, the
accumulating expected costs of all ADs related to the MU-2B series
airplane safety evaluation may be found at the following Web site:
http://www.faa.gov/aircraft/air_cert/design_approvals/small_airplanes/cos/mu2_foia_reading_library/.
Relevant Service Information
We have reviewed and approved the technical contents of Honeywell
International Inc. Alert Service Bulletin (ASB) No. TPE331-A73-0254,
Revision 2, dated June 17, 2005; ASB No. TPE331-A73-0262, Revision 2,
dated June 17, 2005; and ASB No. TPE331-A73-0271, Revision 1, dated
January 25, 2006, that describe procedures for replacing affected fuel
control assemblies with serviceable modified fuel control assemblies.
Also we have reviewed the dimensional inspection requirements of the
fuel control/fuel pump mating splines in the applicable maintenance
manuals.
Differences Between the Proposed AD and the Manufacturer's Service
Information
This proposed AD adds a compliance time of no later than December
31, 2012. Also, this proposed AD provides repetitive inspection
requirements as an optional method of compliance to installing modified
fuel control assemblies for single-engine airplanes used for
agricultural operations.
FAA's Determination and Requirements of the Proposed AD
We have evaluated all pertinent information and identified an
unsafe condition that is likely to exist or develop on other products
of this same type design. We are proposing this AD, which would
require:
Performing initial and repetitive fuel control/fuel pump
mating spline inspections.
Replacing the Woodward fuel control assemblies listed by
part number in the compliance section, with serviceable modified fuel
control assemblies with improved overspeed protection, the next time
the fuel control assembly is removed, but not later than December 31,
2012.
As an optional method of compliance, performing repetitive
fuel control/fuel pump mating spline inspections for engines installed
on single-engine airplanes used for agricultural operations without
having to install a modified fuel control.
Costs of Compliance
We estimate this proposed AD would affect 3,250 engines installed
on airplanes of U.S. registry. We also estimate it would take about one
work hour per engine to replace the fuel control assembly during a
normal scheduled overhaul. We also estimate it would take about three
work hours to perform a dimensional inspection of the fuel control/fuel
pump mating splines. The average labor rate is $65 per work hour. A
replacement fuel control assembly would cost about $9,700 per engine.
We estimate that on each engine one fuel control inspection would be
performed, and each engine would have the fuel control replaced. Based
on these figures, we estimate the total cost of the proposed AD to U.S.
operators to be $32,370,000.
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 proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD 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.
For the reasons discussed above, I certify that the proposed
regulation:
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. Would 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 regulatory evaluation of the estimated costs to
comply with this proposed AD. See the ADDRESSES section for a location
to examine the regulatory evaluation.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Proposed Amendment
Under the authority delegated to me by the Administrator, the
Federal Aviation Administration proposes to amend 14 CFR part 39 as
follows:
PART 39--AIRWORTHINESS DIRECTIVES
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]
2. The FAA amends Sec. 39.13 by adding the following new
airworthiness directive:
Honeywell International Inc. (formerly AlliedSignal Inc., Garrett
Engine
[[Page 11548]]
Division; Garrett Turbine Engine Company; and AiResearch
Manufacturing Company of Arizona): Docket No. FAA-2006-23706;
Directorate Identifier 2006-NE-03-AD.
Comments Due Date
(a) The Federal Aviation Administration (FAA) must receive
comments on this airworthiness directive (AD) action by May 8, 2006.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Honeywell International Inc. TPE331-1, -
2, -2UA, -3U, -3UW, -5, -5A, -5AB, -5B, -6, -6A, -10, -10AV, -10GP,
-10GT, -10P, -10R, -10T, -10U, -10UA, -10UF, -10UG, -10UGR, -10UR, -
11U, -12JR, -12UA, -12UAR, and -12UHR turboprop engines with the
part numbers (P/Ns) of Woodward fuel control assemblies listed in
this AD, installed. These engines are installed on, but not limited
to, the following airplanes:
------------------------------------------------------------------------
Manufacturer Model
------------------------------------------------------------------------
AERO PLANES, LLC (formerly McKinnon G-21G.
Enterprises).
ALLIED AG CAT PRODUCTIONS (formerly G-164 SERIES.
Schweizer).
AYRES.................................. S-2R SERIES.
BRITISH AEROSPACE LTD (formerly 3101 AND 3201 SERIES, AND
Jetstream). HP.137 JETSTREAM MK.1.
CONSTRUCCIONES AERONAUTICAS, S.A. C-212 SERIES.
(CASA).
DEHAVILLAND............................ DH104 SERIES 7AXC (DOVE).
DORNIER................................ 228 SERIES.
FAIRCHILD.............................. SA226 AND SA227 SERIES
(SWEARINGEN MERLIN AND METRO
SERIES).
GRUMMAN AMERICAN....................... G-164 SERIES.
MITSUBISHI............................. MU-2B SERIES (MU-2 SERIES).
PILATUS................................ PC-6 SERIES (FAIRCHILD PORTER
AND PEACEMAKER).
POLSKIE ZAKLADY LOTNICZE SPOLKA PZL M18, PZL M18A, PZL M18B.
(formerly Wytwornia Sprzetu
Komunikacyjnego).
PROP-JETS, INC......................... 400.
RAYTHEON AIRCRAFT (formerly Beech)..... C45G, TC-45G, C-45H, TC-45H, Tc-
45J. G18S, E18S-9700, D18S,
D18C, H18, RC-45J, JRB-6, UC-
45J, 3N, 3NM, 3TM, B100, C90
AND E90.
SHORTS BROTHERS AND HARLAND, LTD....... SC7 (SKYVAN) SERIES.
THRUSH (ROCKWELL COMMANDER)............ S-2R.
TWIN COMMANDER (JETPROP COMMAMDER)..... 680, 690 AND 695 SERIES.
------------------------------------------------------------------------
Unsafe Condition
(d) This AD results from reports of loss of the drive between
the fuel pump and fuel control, leading to engine overspeed,
overtorque, overtemperature, uncontained rotor failure, and
asymmetric thrust in multi-engine airplanes. We are issuing this AD
to prevent rapid, uncommanded, uncontrolled increase in fuel flow to
the engine, asymmetric thrust, uncontained rotor failure, and damage
to the airplane.
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.
Initial Inspection
(f) At the next scheduled inspection of the fuel control
assembly and fuel pump mating splines, but within 1,000 hours-in-
service after the effective date of this AD:
(1) Perform an initial dimensional inspection of the splines
between the fuel pump and fuel control, for wear or damage.
Information on spline inspection can be found in Section 72-00-00 of
the applicable maintenance manuals.
(2) Repair or replace the fuel control assembly if the splines
fail the dimensional inspection, with any serviceable fuel control
assembly.
Repetitive Inspections
(g) Thereafter, within 1,000 hours since-last-inspection:
(1) Perform repetitive dimensional inspections of the splines
between the fuel pump and fuel control, for wear or damage.
Information on spline inspection can be found in Section 72-00-00 of
the applicable maintenance manuals.
(2) Repair or replace the fuel control assembly if the splines
fail the dimensional inspection, with any serviceable fuel control
assembly.
TPE331-1, -2, and -2UA Series Engines
(h) For TPE331-1, -2, and -2UA series engines, replace Woodward
fuel control assemblies, P/Ns 869199-13/ -20/ -21/ -22/ -23/ -24/ -
25/ -26/ -27/ -28/ -29/ -31/ -32/ -33/ -34 and -35, with a
serviceable, modified fuel control assembly the next time the fuel
control assembly is removed for cause that requires return, or when
the fuel control assembly requires overhaul, but not later than
December 31, 2012. Information on replacement fuel control assembly
P/Ns, configuration management, rework, and replacement information,
can be found in Honeywell Alert Service Bulletin (ASB) No. TPE331-
A73-0271, Revision 1, dated January 25, 2006.
TPE331-3U, -3UW, -5, -5A, -5AB, -5B, -6, -6A, -10AV, -10GP, -10GT, -
10P, and -10T Series Engines
(i) For TPE331-3U, -3UW, -5, -5A, -5AB, -5B, -6, -6A, -10AV, -
10GP, -10GT, -10P, and -10T series engines, replace Woodward fuel
control assemblies, P/Ns 893561-7/ -8/ -9/ -10/ -11/ -14/ -15/ -16/
-20/ -26/ -27 and -29, and P/Ns 897770-1/ -3/ -7/ -9/ -10/ -11/ -12/
-14/ -15/ -16/ -25/ -26 and -28, with a serviceable, modified fuel
control assembly the next time the fuel control assembly is removed
for cause that requires return, or when the fuel control assembly
requires overhaul, but not later than December 31, 2012. Information
on replacement fuel control assembly P/Ns, configuration management,
rework, and replacement information, can be found in Honeywell ASB
No. TPE331-A73-0262, Revision 2, dated June 17, 2005.
TPE331-10, -10R, -10U, -10UA, -10UF, -10UG, -10UGR, -10UR, -11U, -12JR,
-12UA, -12UAR, and -12UHR Series Engines
(j) For TPE331-10, -10R, -10U, -10UA, -10UF, -10UG, -10UGR, -
10UR, -11U, -12JR, -12UA, -12UAR, and -12UHR series engines, replace
Woodward fuel control assemblies, P/Ns 897375-2/ -3/ -4/ -5/ -8/ -9/
-10/ -11/ -12/ -13/ -14/ -15/ -16/ -17/ -19/ -21/ -24/ -25/ -26 and
-27, and P/Ns 897780-1/ -2/ -3/ -4/ -5/ -6/ -7/ -8/ -9/ -10/ -11/ -
14/ -15/ -16/ -17/ -18/ -19/ -20/ -21/ -22/ -23/ -24/ -25/ -26/ -27/
-30/ -32/ -34/ -36/ -37 and -38, and P/Ns 893561-17/ -18 and -19,
with a serviceable, modified fuel control assembly the next time the
fuel control assembly is removed for cause that requires return, or
when the fuel control assembly requires overhaul, but not later than
December 31, 2012. Information on replacement fuel control assembly
P/Ns, configuration management, rework, and replacement information,
can be found in Honeywell ASB TPE331-A73-0254, Revision 2, dated
June 17, 2005.
Definitions
(k) For the purposes of this AD:
(1) A serviceable, modified fuel control assembly for engines
affected by paragraph (h), (i), or (j) of this AD, is a fuel control
assembly with a P/N not listed in this AD.
(2) A removal for cause that requires return, for engines
affected by paragraph (h),
[[Page 11549]]
(i), or (j) of this AD, is a fuel control assembly that has
displayed an unserviceable or unacceptable operating condition
requiring the fuel control to be removed and sent to a repair or
overhaul shop.
Optional Method of Compliance for TPE331 Series Engines Installed On
Single-Engine Airplanes Used for Agricultural Operations
(l) As an optional method of compliance to paragraph (h), (i),
or (j), for TPE331 series engines installed on single-engine
airplanes used for agricultural operations, having an affected
Woodward fuel control assembly:
(1) Continue repetitive dimensional inspections of the splines
between the fuel pump and fuel control, for wear or damage as
specified in paragraph (g) of this AD.
(2) Repair or replace the fuel control assembly if the splines
fail the dimensional inspection, with any serviceable fuel control
assembly.
(3) Installation of a serviceable, modified fuel control
assembly is not required.
Terminating Action
(m) Performing a fuel control assembly replacement as specified
in paragraph (h), (i), or (j) of this AD, is terminating action for
the initial and repetitive inspections required by this AD.
Alternative Methods of Compliance
(n) The Manager, Los Angeles 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.
Related Information
(o) None.
Issued in Burlington, Massachusetts, on March 2, 2006.
Peter A. White,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. E6-3260 Filed 3-7-06; 8:45 am]
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