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PROPOSED AD CONTINENTAL AEROSPACE TECHNOLOGIES, INC. AND CONTINENTAL MOTORS: Docket No. FAA-2021-0875; Project Identifier AD-2021-00675-E.
(a) COMMENTS DUE DATE

    The FAA must receive comments on this airworthiness directive (AD)  by
    November 26, 2021.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to the reciprocating engine models identified in para-
    graphs (c)(1) and (2) of this AD  with an F&M Enterprises, Inc.  (F&M)
    or  Stratus Tool Technologies, LLC (Stratus)  oil  filter  adapter in-
    stalled  per  Supplemental  Type  Certificate  SE8409SW,  SE09356SC or
    SE10348SC.

(1) Continental Aerospace Technologies, Inc.  (Type Certificate previously
    held by Continental Motors,  Inc., and Teledyne Continental  Motors) C
    -125-1, C-125-2,  C145-2, C145-2H,  IO-360-C, IO-360-D,  IO-360-DB, IO
    -360-H, IO-360-HB, IO-360-K, IO-360-KB, IO-470-E, IO-470-S,  IO-550-B,
    IO-550-G, O-300-B, O-300-C, O-300-D, O-300-E, O-470-A, O-470-B,  O-470
    -G, O-470-J, O-470-K, O-470-L,  O-470-M, O-470-N, O-470-R, O-470-S,  O
    -470-U O-470-11, O-470-15,  TSIO-360-E, TSIO-360-EB, TSIO-360-F,  TSIO
    -360-FB, TSIO-360-GB, TSIO-360-LB, TSIO-360-MB, TSIO-360-SB,  TSIO-520
    -C,  TSIO-520-CE,  TSIO-520-E,  and  TSIO-520-UB  model  reciprocating
    engines, and

(2) Continental Motors (Type Certificate previously held by Teledyne Cont-
    inental Motors) IO-520-A, IO-520-B,  IO-520-BA,  IO-520-BB,  IO-520-C,
    IO-520-D, IO-520-J, and IO-520-L model reciprocating engines.

(d) SUBJECT

    Joint Aircraft System Component (JASC) Code 8550, Reciprocating Engine
    Oil System.

(e) UNSAFE CONDITION

    This AD was prompted by reports of two accidents that were the  result
    of power loss  due to oil  starvation. The FAA  is issuing this  AD to
    prevent loss of engine power. The unsafe condition, if not  addressed,
    could result in failure of the engine, in-flight shutdown, and loss of
    control of the aircraft.

(f) COMPLIANCE

    Comply with this AD within the compliance times specified,  unless al-
    ready done.

(g) REQUIRED ACTIONS

    Before accumulating 50 flight hours  after the effective date of  this
    AD or at  the next scheduled  oil change after  the effective date  of
    this AD, whichever occurs first, remove any F&M or Stratus oil  filter
    adapter fiber gasket from service and replace it with a Stratus  AN900
    -28 or AN900-29  oil filter adapter  copper gasket in  accordance with
    the  Compliance  Instructions,  paragraph  6.,  pages  7  through   10
    (including all detailed instructions  for Figure 5 through Figure 16),
    of Stratus Tool Technologies Mandatory Service Bulletin  SB-001 Rev B,
    dated June 17, 2021.

(h) INSTALLATION PROHIBITION

    After the effective date of this AD, do not install or reuse an F&M or
    Stratus fiber gasket in any F&M  or Stratus Tool Technologies oil fil-
    ter adapter.

(i) SPECIAL FLIGHT PERMIT

    Special flight permits,  as described in 14 CFR 21.197 and 21.199, are
    subject to the requirements of paragraph (i)(1) of this AD:

(1) Operators may perform  a one-time non-revenue ferry flight  to operate
    the airplane  to a location  where the maintenance action  can be per-
    formed.

(2) [Reserved]

(j) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

(1) The  Manager,  Atlanta ACO 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
    certification  office,  send  it  to  the  attention  of  the   person
    identified in paragraph (k)(1) of this AD.

(2) Before using any approved AMOC,  notify your appropriate principal in-
    spector, or lacking  a principal inspector,  the manager of  the local
    flight standards district office/certificate holding district office.

(k) RELATED INFORMATION

(1) For more information about this AD,  contact  George Hanlin,  Aviation
    Safety Engineer,  Atlanta  ACO  Branch,  FAA,  1701  Columbia  Avenue,
    College Park,  GA 30337;  phone: (404) 474-5584;  fax: (404) 474-5605;
    email: george.hanlin@faa.gov.

(2) For service information  identified in this AD,  contact  Stratus Tool
    Technologies, LLC,  2208 Air Park Drive, Burlington, NC 27215;  phone:
    (800) 822-3200;  website: https://www.tempestplus.com.  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 October 5, 2021. Gaetano A. Sciortino, Deputy Director for Stra-
tegic Initiatives, Compliance & Airworthiness Division,  Aircraft Certifi-
cation Service.

DATES: The FAA must receive comments  on this proposed AD  by November 26,
2021.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0875; Project Identifier AD-2021-00675-E]
RIN 2120-AA64

Airworthiness Directives; Continental Aerospace Technologies,
Inc. and Continental Motors Reciprocating 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 certain Continental Aerospace Technologies, Inc. C-125, C145, IO-
360, IO-470, IO-550, O-300, O-470, TSIO-360, TSIO-520 series model
reciprocating engines and certain Continental Motors IO-520 series
model reciprocating engines with a certain oil filter adapter
installed. This proposed AD was prompted by reports of two accidents
that were the result of power loss due to oil starvation. This proposed
AD would require removal of the oil filter adapter fiber gasket and its
replacement with a copper gasket. 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 November
26, 2021.

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 Stratus
Tool Technologies, LLC, 2208 Air Park Drive, Burlington, NC 27215;
phone: (800) 822-3200; website: https://www.tempestplus.com. 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 at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0875; 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, any comments
received, and other information. The street address for Docket
Operations is listed above.

FOR FURTHER INFORMATION CONTACT: George Hanlin, Aviation Safety
Engineer, Atlanta ACO Branch, FAA, 1701 Columbia Avenue, College Park,
GA 30337; phone: (404) 474-5584; fax: (404) 474-5605; email:
george.hanlin@faa.gov.

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 ADDRESSES. Include ``Docket No. FAA-2021-0875; Project Identifier
AD-2021-00675-E'' at the beginning of your comments. The most helpful
comments reference a specific portion of the proposal, explain the
reason for any recommended change, and include supporting data. The FAA
will consider all comments received by the closing date and may amend
this proposal because of those comments.
Except for Confidential Business Information (CBI) 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 agency will also post a report summarizing each
substantive verbal contact received about this NPRM.

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
George Hanlin, Aviation Safety Engineer, Atlanta ACO Branch, FAA, 1701
Columbia Avenue, College Park, GA 30337. Any commentary that the FAA
receives which is not specifically designated as CBI will be placed in
the public docket for this rulemaking.

Background

The FAA received reports of two accidents that were the result of
power loss due to oil starvation. The first was a fatal accident on May
1, 2019 involving a Cessna 182P airplane with a Continental Motors O-
470-S engine in Mill Creek, California. National Transportation Safety
Board (NTSB) preliminary accident investigation report, docket number
WPR19FA126, identified evidence of improperly maintained or installed
oil filter adapters. An improperly maintained or installed oil filter
adapter may lead to failure of the fiber gasket, which may result in
oil loss or oil starvation. Based on the investigation, the
manufacturer determined the need to replace the fiber gasket with a
copper gasket. This condition, if not addressed, could result in
failure of the engine, in-flight shutdown, and loss of control of the
aircraft.

FAA's Determination

The FAA is issuing this NPRM after determining that the unsafe
condition described previously is likely to exist or
develop on other products of the same type design.

Related Service Information Under 1 CFR Part 51

The FAA reviewed Stratus Tool Technologies Mandatory Service
Bulletin (MSB) SB-001 Rev B, dated June 17, 2021. This MSB specifies
procedures for removing a fiber gasket and replacing it with a copper
gasket. 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 ADDRESSES.

Proposed AD Requirements in This NPRM

This proposed AD would require removal of the fiber gasket and
replacement with a copper gasket.

Costs of Compliance

The FAA estimates that this AD, if adopted as proposed, would
affect 6,300 engines installed on airplanes of U.S. registry.
The FAA estimates the following costs to comply with this proposed
AD:

Estimated Costs

Action
Labor cost
Parts cost
Cost per product
Cost on U.S. operators
Replace fiber gaskets with copper gaskets. 2.5 work-hours x $85 per hour = $212.50
$34
$246.50
$1,552,950

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) Would not affect intrastate aviation in Alaska, 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.

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

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: