Tdata AD

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2012-03-07	LYCOMING ENGINES (FORMERLY TEXTRON LYCOMING DIVISION, AVCO CORPORATION): Amendment 39-16948; Docket No. FAA-2011-0533; Directorate Identifier 2011-NE-16-AD.

(a) EFFECTIVE DATE

    This AD is effective March 27, 2012.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD  applies to  all Lycoming  Engines reciprocating  engines with
    carburetor part numbers listed in Table 1 of this AD.

    ______________________________________________________________________
    TABLE 1 - PART NUMBERS (INCLUDING ALL DASH NUMBERS) OF KNOWN AFFECTED 
              HA-6 MODEL CARBURETORS                                      
    ______________________________________________________________________
    10-5219-XX     10-5224-XX     10-5230-XX     10-5235-XX    10-5253-XX
    10-5255-XX     10-5283-XX     10-6001-XX     10-6019-XX    10-6030-XX
    ______________________________________________________________________

(d) UNSAFE CONDITION

    This AD  was prompted  by a  report of  a "machined-from-billet"  HA-6
    carburetor having a loose mixture  control sleeve that rotated in  the
    carburetor body  causing restriction  of fuel  and power  loss. We are
    issuing this AD to prevent engine in-flight shutdown, power loss,  and
    reduced control of the airplane.

(e) COMPLIANCE

    Comply with this AD within 50 flight hours after the effective date of
    this AD, unless already done.

(f) INSPECTION

    Inspect the carburetor  to determine the  type of body  the carburetor
    has. Use  Marvel-Schebler Emergency  Service Bulletin  (SB) No. SB-18,
    dated October 14,  2010, or Revision  A, dated March  15, 2011, Figure
    (3) to determine which type of body is used.

(g) If the carburetor has a die-cast body, no further action is required.

(h) If the carburetor has an affected "machined-from-billet" body,  remove
    the carburetor; and replace the carburetor with:

(1) An HA-6 carburetor not listed in Table 1 of this AD; or

(2) An  HA-6  carburetor  that  is  listed  in  Table 1 but is exempted as
    described in paragraphs 1.A.  and 1.B of Marvel-Schebler  Emergency SB
    No. SB-18, dated October 14, 2010 or Revision A, dated March 15, 2011;
    or that has already been repaired using that Emergency SB.

(i) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

    The Manager, Atlanta Aircraft  Certification Office, FAA, may  approve
    AMOCs for this AD.  Use the procedures found  in 14 CFR 39.19  to make
    your request.

(j) RELATED INFORMATION

    For more  information about  this AD,  contact Kevin  Brane, Aerospace
    Engineer,  Propulsion,  Atlanta  Aircraft  Certification  Office, FAA,
    Small  Airplane  Directorate;  1701  Columbia  Avenue,  College  Park,
    Georgia 30337;  phone: (404)  474-5582;  fax:  (404) 474-5606;  email:
    kevin.brane@faa.gov.

(k) MATERIAL INCORPORATED BY REFERENCE

(1) You  must  use  the  following  service  information to do the actions
    required by this AD, unless  the AD specifies otherwise. The  Director
    of the Federal Register approved the incorporation by reference  (IBR)
    under 5  U.S.C. 552(a)  and 1  CFR part  51 of  the following  service
    information:

(i) Marvel-Schebler Emergency Service Bulletin  No. SB-18,  dated  October
    14, 2010.

(ii) Marvel-Schebler  Emergency  Service  Bulletin  No. SB-18, Revision A,
     dated March 15, 2011.

(2) For service information identified in this AD, contact Marvel-Schebler
    Aircraft Carburetors LLC, 125 Piedmont Avenue, Gibsonville, NC  27249;
    phone:       336-446-0002;       fax:       336-446-0007;       email:
    customerservice@msacarbs.com; Web site: www.msacarbs.com.

(3) You may review copies of the service information at the FAA,  Engine &
    Propeller Directorate, 12 New England Executive Park,  Burlington, MA.
    For information on the availability of this material at the FAA,  call
    781-238-7125.

(4) You  may  also  review  copies  of  the  service  information  that is
    incorporated  by  reference  at  the  National  Archives  and  Records
    Administration (NARA).  For information  on the  availability of  this
    material  at   an  NARA   facility,  call   202-741-6030,  or   go  to
    http://www.archives.gov/federal_register/code_of_federal_regulations/i
    br_locations.html.

Issued in Burlington, Massachusetts, on February 1, 2012. Peter A.  White,
Manager, Engine & Propeller Directorate, Aircraft Certification Service.

FOR  FURTHER  INFORMATION   CONTACT:  Kevin  Brane,   Aerospace  Engineer,
Propulsion,  Atlanta Aircraft  Certification Office,  FAA, Small  Airplane
Directorate; 1701  Columbia Avenue,  College Park,  Georgia 30337;  phone:
404-474-5582; fax: 404-474-5606; email: kevin.brane@faa.gov.

PREAMBLE

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

SUMMARY: We are adopting a new airworthiness directive (AD) for certain
Lycoming Engines reciprocating engines. This AD was prompted by a
report of a ``machined-from-billet'' HA-6 carburetor having a loose
mixture control sleeve that rotated in the carburetor body causing
restriction of fuel and power loss. This AD requires removing certain
``machined-from-billet'' Volare LLC (formerly Precision Airmotive
Corporation, formerly Facet Aerospace Products Company, formerly
Marvel-Schebler (BorgWarner)) HA-6 carburetors, inspecting for a loose
mixture control sleeve or for a sleeve that may become loose, repairing
the carburetor, or replacing the carburetor with one eligible for
installation. We are issuing this AD to prevent engine in-flight
shutdown, power loss, and reduced control of the airplane.

DATES: This AD is effective March 27, 2012.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in the AD as of March 27,
2012.

ADDRESSES: For service information identified in this AD, contact
Marvel-Schebler Aircraft Carburetors LLC, 125 Piedmont Avenue,
Gibsonville NC 27249; phone: 336-446-0002; fax: 336-446-0007; email:
customerservice@msacarbs.com; Web site: www.msacarbs.com. You may
review copies of the referenced service information at the FAA, Engine
& Propeller Directorate, 12 New England Executive Park, Burlington, MA.
For information on the availability of this material at the FAA, call
781-238-7125.

Examining the AD Docket

You may examine the AD docket on the Internet at http://www.regulations.gov;
or in person at the Docket Management Facility
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this AD, the regulatory evaluation,
any comments received, and other information. The address for the
Docket Office (phone: 800-647-5527) is Document Management Facility,
U.S. Department of Transportation, Docket Operations, M-30, West
Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE.,
Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Kevin Brane, Aerospace Engineer,
Propulsion, Atlanta Aircraft Certification Office, FAA, Small Airplane
Directorate; 1701 Columbia Avenue, College Park, Georgia 30337; phone:
404-474-5582; fax: 404-474-5606; email: kevin.brane@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 to include an AD that would apply to the specified products.
That NPRM published in the Federal Register on September 1, 2011 (76 FR
54397). That NPRM proposed to require removing certain ``machined-from-
billet'' Volare LLC (formerly Precision Airmotive Corporation, formerly
Facet Aerospace Products Company, formerly Marvel-Schebler
(BorgWarner)) HA-6 carburetors, inspecting for a loose mixture control
sleeve or for a sleeve that may become loose, repairing the carburetor,
or replacing the carburetor with one eligible for installation.

Comments

We gave the public the opportunity to participate in developing
this AD. The following presents the comment received on the proposal
and the FAA's response.

Request To Incorporate All Affected Engine Models

One commenter, a private citizen, requested that we incorporate all
affected engine models with HA-6 model carburetors installed in the AD.
The commenter provided a list, which he compiled from reviewing all
applicable published Type Certificate Data Sheets (TCDS).
We partially agree. We agree that some additional models are
affected because the list provided by the commenter is mostly
consistent with the applicable TCDS. We do not agree with the commenter
on some of the models he thinks are affected, because we could not
confirm they are affected, based on the TCDS. However, we determined
that we need to change the applicability from a table of specific
engine models, to all Lycoming Engines reciprocating engines with
carburetor part numbers listed in Table 1 of the AD. We changed the AD
applicability to all Lycoming Engines reciprocating engines with
carburetor part numbers listed in Table 1 of the AD.

Change to the Alternative Methods of Compliance (AMOC) Paragraph

Since we issued the proposed AD, we found that we referenced the
wrong office in the AMOC paragraph. We changed that sentence to state
that the Manager, Atlanta Aircraft Certification Office, FAA, may
approve AMOCs for this AD.

Change to Service Information

Marvel-Schebler Aircraft Carburetors LLC has revised their Marvel-
Schebler Emergency Service Bulletin (SB) No. SB-18, dated October 14,
2010, to Revision A, dated March 15, 2011. We reviewed Revision A, and
determined that it also is acceptable. We changed the incorporated by
reference paragraph k of the AD to include the original issue and
Revision A.

Conclusion

We reviewed the relevant data, considered the comment received, and
determined that air safety and the public interest require adopting the
AD with the changes described previously. We also determined that these
changes will not increase the economic burden on any operator or
increase the scope of the AD.

Costs of Compliance

We estimate that this AD affects 10,700 engines installed on
aircraft of U.S. registry. We also estimate that it will take about 0.5
work-hours per aircraft to perform the inspection, and that about 409
carburetors will need repair. Approximately 2 work-hours per carburetor
are required to repair the carburetor. The average labor rate is $85
per work-hour. Required parts will cost about $600 per carburetor.
Based on these figures, we estimate the cost of the AD on U.S.
operators to be $769,680. Our estimate is exclusive of possible
warranty coverage.

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

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),
(3) Will not affect intrastate aviation in Alaska, and
(4) 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.

Adoption of the Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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 (AD):