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Rules and Regulations
Federal Register Vol. 86, No. 13
Friday, January 22, 2021

This section of the FEDERAL REGISTER
contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20200910; Project Identifier 2018CE044AD; Amendment 3921378; AD 20210102
RIN 2120AA64

Airworthiness Directives; M7
Aerospace LLC Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for M7
Aerospace LLC Models SA26AT and SA26T airplanes. This AD was prompted by reports of the airplane power lever linkage detaching from the TPE331 engine propeller pitch control PPC shaft. This AD requires repetitively inspecting the PPC for proper torque and making any necessary corrections until the replacement of the PPC assembly and the installation of a secondary retention feature safety wire are done. The FAA is issuing this AD to address the unsafe condition on these products.

SUMMARY:

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DATES:

This AD is effective February 26,
2021.
The Director of the Federal Register approved the incorporation by reference IBR of a certain publication listed in this AD as of May 5, 2017 82 FR 15982, March 31, 2017.
ADDRESSES: For service information identified in this final rule, contact Honeywell International Inc., 111 S 34th Street, Phoenix, Arizona 850342802;
phone: 8558086500; email:
AeroTechSupport@honeywell.com;
internet: https

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17:17 Jan 21, 2021

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aerospace.honeywell.com/en/services/
maintenance-and-monitoring. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, Missouri 64106. For information on the availability of this material at the FAA, call 8163294148.
It is also available at https
www.regulations.gov by searching for and locating Docket No. FAA2020
0910.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20200910; 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 final rule, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Jonas Perez, Aerospace Engineer, Fort Worth ACO Branch, FAA, 10101
Hillwood Parkway, Fort Worth, Texas 761771524; phone: 8172225145; fax:
8172225960; email: jonas.perez@
faa.gov.
SUPPLEMENTARY INFORMATION:
Background The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to M7 Aerospace LLC Models SA26AT and SA26T airplanes. The NPRM published in the Federal Register on October 14, 2020 85 FR
64993. The NPRM was prompted by reports of the airplane power lever linkage detaching from the TPE331
engine PPC shaft. In the NPRM, the FAA
proposed to require repetitively inspecting the PPC for proper torque and making any necessary corrections until the replacement of the PPC
assembly and the installation of a secondary retention feature safety wire are done. The FAA is issuing this AD to prevent uncommanded change to the
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engine power settings with consequent loss of control.
Discussion of Final Airworthiness Directive Comments The FAA received no comments on the NPRM or on the determination of the costs.
Conclusion The FAA reviewed the relevant data and determined that air safety requires adopting this AD as proposed.
Accordingly, the FAA is issuing this AD
to address the unsafe condition on these products. This AD is adopted as proposed in the NPRM.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Honeywell International Inc. Service Bulletin TPE331722190, dated December 21, 2011, which contains procedures for replacing or reworking the propeller pitch control assembly, incorporating a threaded hole in the splined end of the shouldered shaft, and reassembling the propeller pitch control assembly.
Honeywell International Inc. Service Bulletin TPE331722190, dated December 21, 2011, was previously approved for IBR on May 5, 2017 82 FR
15982, March 31, 2017. 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.
Other Related Service Information The FAA also reviewed paragraph j.
of M7 Aerospace SA26 Series Maintenance Manual Temporary Revision 402, dated July 22, 2020, which contains information related to the installation of the secondary retention feature safety wire on the airplane PPC lever and the PPC
assembly.
Costs of Compliance The FAA estimates that this AD
affects 55 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:

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