[Federal Register Volume 85, Number 94 (Thursday, May 14, 2020)]
[Proposed Rules]
[Pages 28888-28890]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-09944]
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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. 85, No. 94 / Thursday, May 14, 2020 /
Proposed Rules
[[Page 28888]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2020-0471; Project Identifier MCAI-2019-00126-E]
RIN 2120-AA64
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft
Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for all Pratt & Whitney Canada Corp. (P&WC) PT6B-37A model turboshaft
engines with engine serial number PCE-PU0289 and earlier. This proposed
AD was prompted by a report of contamination from galvanic corrosion
between the fuel control unit (FCU) aluminum body and the steel union
fitting causing the loss of engine control, resulting in an engine
over-speed condition and subsequent in-flight shutdown (IFSD). This
proposed AD would require replacing the FCU with a part eligible for
installation. The FAA is proposing this AD to address the unsafe
condition on these products.
DATES: The FAA must receive comments on this proposed AD by June 29,
2020.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202-493-2251.
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12 140, 1200 New
Jersey Avenue SE, Washington, DC 20590.
Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this NPRM, contact Pratt &
Whitney Canada Corp., 1000 Marie-Victorin, Longueuil, Quebec, Canada,
J4G 1A1; phone: 800-268-8000; fax: 450-647-2888; website: https://www.pwc.ca/en/. You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 1200
District Avenue, Burlington, MA, 01803. For information on the
availability of this material at the FAA, call 781-238-7759.
Examining the AD Docket
You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-
0471; or in person at Docket Operations between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays. The AD docket contains
this NPRM, the mandatory continuing airworthiness information (MCAI),
any comments received, and other information. The street address for
Docket Operations is listed above. Comments will be available in the AD
docket shortly after receipt.
FOR FURTHER INFORMATION CONTACT: Mehdi Lamnyi, Aerospace Engineer, ECO
Branch, FAA, 1200 District Avenue, Burlington, MA, 01803; phone: 781-
238-7743; fax: 781-238-7199; email: [email protected].
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include ``Docket No. FAA-2020-0471;
Project Identifier MCAI-2019-00126-E'' at the beginning of your
comments. The FAA specifically invites comments on the overall
regulatory, economic, environmental, and energy aspects of this NPRM.
The FAA will consider all comments received by the closing date and may
amend this NPRM because of those comments.
Except for Confidential Business Information as described in the
following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
https://www.regulations.gov, including any personal information you
provide. The FAA will also post a report summarizing each substantive
verbal contact received about this NPRM.
Confidential Business Information
Confidential Business Information (CBI) is commercial or financial
information that is both customarily and actually treated as private by
its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552),
CBI is exempt from public disclosure. If your comments responsive to
this NPRM contain commercial or financial information that is
customarily treated as private, that you actually treat as private, and
that is relevant or responsive to this NPRM, it is important that you
clearly designate the submitted comments as CBI. Please mark each page
of your submission containing CBI as ``PROPIN.'' The FAA will treat
such marked submissions as confidential under the FOIA, and they will
not be placed in the public docket of this NPRM. Submissions containing
CBI should be sent to Mehdi Lamnyi, Aerospace Engineer, ECO Branch,
FAA, 1200 District Avenue, Burlington, MA, 01803. Any commentary that
the FAA receives which is not specifically designated as CBI will be
placed in the public docket for this rulemaking.
Discussion
Transport Canada Civil Aviation (Transport Canada), which is the
aviation authority for Canada, has issued Transport Canada AD CF-2019-
05, dated February 19, 2019 (referred to after this as ``the MCAI''),
to address the unsafe condition on these products. The MCAI states:
There has been one reported incident on a PT6B-37A engine, where
the contamination from galvanic corrosion between the FCU aluminum
body and the steel union fitting has caused the loss of engine
control, resulting in an engine over-speed condition and
subsequently leading to an engine inflight shutdown (IFSD). This
condition, if not corrected, could lead to additional cases of
IFSDs, which on a single engine helicopter may result in an
emergency autorotation landing. To address the subject galvanic
corrosion problem in the FCU, P&WC has issued Service Bulletin (SB)
39107 to replace the affected FCUs with a modified FCU that is not
susceptible to the subject galvanic corrosion problem. This
[Transport Canada] AD mandates compliance with P&WC SB 39107,
requiring the replacement of the
[[Page 28889]]
affected FCUs to mitigate the potential unsafe condition.
You may obtain further information by examining the MCAI in the AD
docket on the internet at https://www.regulations.gov by searching for
and locating Docket No. FAA-2020-0471.
Related Service Information Under 1 CFR Part 51
The FAA reviewed P&WC Service Bulletin (SB) No. PT6B-72-39107,
Revision No. 1, dated December 13, 2017. The SB describes procedures
for replacing the FCU. This service information is reasonably available
because the interested parties have access to it through their normal
course of business or by the means identified in the ADDRESSES section.
FAA's Determination
This product has been approved by the aviation authority of Canada
and is approved for operation in the United States. Pursuant to our
bilateral agreement with Canada, Transport Canada, its technical
representative has notified us of the unsafe condition described in the
MCAI and service information referenced above. The FAA is proposing
this AD because it evaluated all the relevant information provided by
Transport Canada and determined the unsafe condition described
previously is likely to exist or develop in other products of the same
type design.
Proposed AD Requirements
This proposed AD would require replacing the FCU with a part
eligible for installation.
Differences Between This Proposed AD and the Service Information
P&WC SB No. PT6B-72-39107, Revision No. 1, dated December 13, 2017,
directs the replacement of both the FCU and the bypass valve cover.
This proposed AD requires only the replacement of the FCU.
Costs of Compliance
The FAA estimates that this proposed AD affects 75 engines
installed on helicopters of U.S. registry.
The FAA estimates the following costs to comply with this proposed
AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
Replace the FCU.................... 1 work-hour x $85 per hour $37,000 $37,085 $2,781,375
= $85.
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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.
The FAA is 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
The FAA 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 this proposed
regulation:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 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):
Pratt & Whitney Canada Corp: Docket No. FAA-2020-0471; Project
Identifier MCAI-2019-00126-E.
(a) Comments Due Date
The FAA must receive comments by June 29, 2020.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Pratt & Whitney Canada Corp. (P&WC) PT6B-37A
model turboshaft engines with engine serial number PCE-PU0289 and
earlier, which do not have an installed fuel control unit (FCU) that
incorporates a stainless steel air adapter using P&WC Service
Bulletin (SB) No. PT6B-72-39107, Revision No. 1, dated December 13,
2017.
(d) Subject
Joint Aircraft System Component (JASC) Code 7321, Fuel Control/
Turbine Engines.
(e) Unsafe Condition
This AD was prompted by a report of contamination from galvanic
corrosion between the FCU aluminum body and the steel union fitting
causing the loss of engine control, resulting in an engine over-
speed condition and subsequent in-flight shutdown (IFSD). The FAA is
issuing this AD to prevent failure of the FCU due to contamination
from galvanic corrosion. The unsafe condition, if not addressed,
could result in loss of engine control, failure of the engine, IFSD,
and loss of the helicopter.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
Within the compliance time identified in Table 1 to paragraph
(g) of this AD, replace the FCU with an FCU that incorporates the
stainless steel air adapter using the Accomplishment Instruments,
paragraphs 3.A. and 3.C., of P&WC SB No. PT6B-72-
[[Page 28890]]
39107, Revision No. 1, dated December 13, 2017.
Table 1 to Paragraph (g)--Compliance Time Requirements
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Compliance time [A or B,
whichever occurs later after the
effective date of this AD]
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A.................................... Before the FCU accumulates 1,500
flight hours, or before the FCU
accumulates six years since new
or last overhaul, whichever
occurs first.
B.................................... Within six months.
------------------------------------------------------------------------
(h) Credit for Previous Actions
You may take credit for the replacement of the FCU that is
required by paragraph (g) of this AD if you replaced the FCU with an
FCU that incorporates a stainless steel air adapter before the
effective date of this AD using P&WC SB No. PT6B-72-39107, Original
Issue, dated December 15, 2016.
(i) Alternative Methods of Compliance (AMOCs)
(1) The Manager, ECO Branch, FAA, has the authority to approve
AMOCs for this AD, if requested using the procedures found in 14 CFR
39.19. In accordance with 14 CFR 39.19, send your request to your
principal inspector or local Flight Standards District Office, as
appropriate. If sending information directly to the manager of the
ECO Branch, send it to the attention of the person identified in
paragraph (j)(1) of this AD. You may email your request to: [email protected].
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
district office.
(j) Related Information
(1) For more information about this AD, contact Mehdi Lamnyi,
Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue,
Burlington, MA, 01803; phone: 781-238-7743; fax: 781-238-7199;
email: [email protected].
(2) Refer to Transport Canada Civil Aviation (Transport Canada)
AD CF-2019-05, dated February 19, 2019, for more information. You
may examine the Transport Canada AD in the AD docket on the internet
at https://www.regulations.gov by searching for and locating it in
Docket No. FAA-2020-0471.
(3) For service information identified in this AD, contact Pratt
& Whitney Canada Corp., 1000 Marie-Victorin, Longueuil, Quebec,
Canada, J4G 1A1; phone: 800-268-8000; fax: 450-647-2888; website:
https://www.pwc.ca/en/. You may view this referenced service
information at the FAA, Airworthiness Products Section, Operational
Safety Branch, 1200 District Avenue, Burlington, MA 01803. For
information on the availability of this material at the FAA, call
781-238-7759.
Issued on May 5, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2020-09944 Filed 5-13-20; 8:45 am]
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