[Federal Register Volume 89, Number 109 (Wednesday, June 5, 2024)]
[Notices]
[Pages 48210-48211]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-12310]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

[Docket No. FAA-2024-1481]


Notice of Intent To Designate as Abandoned Turbine Conversions, 
Int. Supplemental Type Certificate No. SA4293WE

AGENCY: Federal Aviation Administration (FAA) DOT.

ACTION: Notice of intent to designate Turbine Conversions, Int. 
Supplemental Type Certificate as abandoned; request for comments.

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SUMMARY: This notice announces the FAA's intent to designate Turbine 
Conversions, Int. Supplemental Type Certificate (STC) No. SA4293WE as 
abandoned and make the related engineering data available upon request. 
The FAA has received a request to provide engineering data concerning 
this STC. The FAA has been unsuccessful in contacting Turbine 
Conversions, Int. concerning the STC. This action is intended to 
enhance aviation safety.

DATES: The FAA must receive all comments by December 2, 2024.

ADDRESSES: You may send comments on this notice by any of the following 
methods:
     Federal eRulemaking Portal: Go to regulations.gov. Follow 
the instructions for submitting comments.
     Mail: Chuck Ayala, Aviation Safety Engineer, West 
Certification Branch, FAA, 3960 Paramount Blvd., Suite 100 Lakewood, CA 
90712-4137.
     Email: [email protected]. Include ``Docket No. FAA-
2024-1481'' in the subject line of the message.
     Hand Delivery: Deliver to mailing address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.

FOR FURTHER INFORMATION CONTACT: Chuck Ayala, Aviation Safety Engineer, 
FAA; telephone: 562-627-5226; email: [email protected].

SUPPLEMENTARY INFORMATION:

[[Page 48211]]

Comments Invited

    The FAA invites interested parties to provide comments, written 
data, views, or arguments relating to this notice. Send your comments 
to an address listed under the ADDRESSES section. Include ``Docket No. 
FAA-2024-1481'' at the beginning of your comments. The FAA will 
consider all comments received on or before the closing date. All 
comments received will be available in the docket for examination by 
interested persons.

Background

    The FAA is posting this notice to inform the public of the intent 
to designate as abandoned Turbine Conversions, Int. STC No. SA4293WE 
and subsequently release the related engineering data. Turbine 
Conversions, Int. STC No. SA4293WE is for the removal of the original 
equipment engines and propellers and the installation of two Lycoming 
LTP101-600A-1A turbo-propeller engines and two three-bladed Hartzell 
HC-B3TN-3C/T10173-13Q propellers and controls including a major fuel 
system modification, in accordance with Riley Aircraft Corporation 
data, in Cessna Aircraft 421B and 421C series airplanes.
    The FAA has received a third-party request for the release of the 
aforementioned engineering data under the provisions of the Freedom of 
Information Act (FOIA), 5 U.S.C. 552. The FAA cannot release commercial 
or financial information under FOIA without the permission of the data 
owner. However, in accordance with 49 U.S.C. 44704(a)(5), the FAA can 
provide STC ``engineering data'' it possesses for STC maintenance or 
improvement, upon request, if the following conditions are met:
    1. The FAA determines the STC has been inactive for three years or 
more;
    2. Using due diligence, the FAA is unable to locate the owner of 
record or the owner of record's heir; and
    3. The availability of such data will enhance aviation safety.
    There has been no activity on this STC for more than three years.
    On October 13, 2023, the FAA sent a certified letter to Turbine 
Conversions, Int. at its last known address, 2016 Palomar Airport Road, 
Carlsbad, California 92008. The letter was returned, unable to be 
forwarded. The letter informed Turbine Conversions, Int. that the FAA 
had received a request for engineering data related to STC No. SA4293WE 
and was conducting a due diligence search to determine whether the STC 
was inactive and may be considered abandoned. The letter further 
requested Turbine Conversions, Int. to respond in writing within 60 
days and state whether it is the holder of the STC. The FAA also 
attempted to make contact with Turbine Conversions, Int. by other 
means, including telephone communication and emails, without success.

Information Requested

    If you are the owner or heir or a transferee of STC No. SA4293WE or 
have any knowledge regarding who may now hold STC No. SA4293WE, please 
contact Chuck Ayala using a method described in this notice under FOR 
FURTHER INFORMATION CONTACT. If you are the heir of the owner, or the 
owner by transfer, of STC No. SA4293WE, you must provide a notarized 
copy of your government-issued identification with a letter and 
background establishing your ownership of the STC and, if applicable, 
your relationship as the heir to the deceased holder of the STC.

Conclusion

    If the FAA does not receive any response by December 2, 2024, the 
FAA will consider STC No. SA4293WE abandoned, and the FAA will proceed 
with the release of the requested data. This action is for the purpose 
of maintaining the airworthiness of an aircraft and enhancing aviation 
safety.

    Issued on May 31, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2024-12310 Filed 6-4-24; 8:45 am]
BILLING CODE 4910-13-P