DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0223; Project Identifier AD-2020-00539-A]
Airworthiness Directives; Mooney International Corporation Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Proposed rule; correction.
SUMMARY: The FAA is correcting a notice of proposed rulemaking
that published in the Federal Register. The NPRM proposed to issue an
airworthiness directive (AD) that would apply to certain Mooney
International Corporation (Mooney) Model M20V airplanes. As published,
the docket number referenced throughout is incorrect. This document
corrects that error. In all other respects, the original document
remains the same; however, for clarity, the FAA is publishing the
entire proposed rule in the Federal Register.
DATES: The last date for submitting comments on the NPRM (86 FR
March 9, 2021) remains April 23, 2021.
ADDRESSES: You may send comments, using the procedures found in
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow
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 the NPRM, contact Mooney
International Corporation, 165 Al Mooney Road, North Kerrville, TX
78028; phone: (800) 456-3033; email: firstname.lastname@example.org. You may view
this service information at the FAA, Airworthiness Products Section,
Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For
information on the availability of this material at the FAA, call (816)
Examining the AD Docket
You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0223; or in person at
Docket Operations between 9 a.m. and 5 p.m., Monday through Friday,
except Federal holidays. The AD docket contains the NPRM, any comments
received, and other information. The street address for Docket
Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Jacob Fitch, Aviation Safety Engineer,
Fort Worth ACO Branch, FAA, 10101 Hillwood Pkwy, Fort Worth, TX 76177;
phone: (817) 222-4130; fax: (817) 222-5245; email: email@example.com.
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-2021-0223; Project Identifier
AD-2020-00539-A" 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 the 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
the 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 the NPRM. Submissions containing CBI should be sent to Jacob
Fitch, Aviation Safety Engineer, Fort Worth ACO Branch, FAA, 10101
Hillwood Pkwy, Fort Worth, TX 76177. Any commentary that the FAA
receives which is not specifically designated as CBI will be placed in
the public docket for this rulemaking.
The FAA published an NPRM (86 FR 13502, March 9, 2021) that would
apply to certain serial-numbered Mooney Model M20V airplanes. The NPRM
proposed to require inspecting the alternator main power cable and the
exhaust crossover tube and modifying the alternator main power cable
routing by installing an additional alternator cable clamp, part number
MS21919WCJ6. The NPRM was prompted by reports of short circuit and
arcing of the alternator main power cable in the engine compartment.
This condition, if unaddressed, could result in a fire hazard, loss of
engine thrust control, and reduced control of the airplane.
Need for the Correction
As published, the docket number referenced throughout the NPRM is
incorrect. The NPRM incorrectly references "Docket No. FAA-2020-0991"
instead of "Docket No. FAA-2021-0223."
Although no other part of the preamble or regulatory information
has been corrected, for clarity, the FAA is publishing the entire
proposed rule in the Federal Register.
The comment due date of the NPRM remains April 23, 2021.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Mooney International Corporation Service Bulletin
M20-340C, dated February 14, 2020 (SB M20-340C). The service
information specifies inspecting the alternator main power cable and
the exhaust crossover tube for damage and replacing damaged parts as
necessary. The service information also contains procedures for modifying
the alternator main power cable routing by installing an additional alter-
nator cable clamp, part number MS21919WCJ6.
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.
The FAA is issuing this NPRM after determining the unsafe condition
described previously is likely to exist or develop in other products of
the same type design.
Proposed AD Requirements in This NPRM
This proposed AD would require accomplishing the actions specified
in the service information described previously, except as discussed
under "Differences Between this Proposed AD and the Service
Differences Between This Proposed AD and the Service Information
SB M20-340C specifies sending a compliance card to Mooney upon
completing the actions in the service information. This proposed AD
would not require that action.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 18 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this proposed AD:
||Cost per product
||Cost on U.S. operators
|Inspect the cable and exhaust
crossover tube for damage.
||.5 work-hour x $85 per hour =
|Install additional cable clamp.
||.5 work-hour x $85 per hour =
The FAA estimates the following costs
to do any necessary repairs/
replacements that would be required based on the results of the
proposed inspection. The agency has no way of determining the number of
aircraft that might need these repairs/replacements:
||Cost per product
|Replace alternator main power
||8 work-hours x $85 per hour =
|Replace exhaust crossover tube.
||8 work-hours x $85.00 per hour
The FAA has included all known costs
in its cost estimate.
According to the manufacturer, however, some of the costs of this
proposed AD may be covered under warranty, thereby reducing the cost
impact on affected operators.
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 proposing 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
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
(1) Is not a "significant regulatory action" under Executive
(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
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 [Corrected]
2. The FAA amends Sec. 39.13 by adding the following new airworthiness