In July 2025, President Trump signed the One Big Beautiful Bill Act. Section 40002 of that law re-institutes the Federal Communications Commission’s general auction authority and specifically directs the Commission to complete a system of competitive bidding for not less than 100 megahertz in the 3.98-4.2 gigahertz band (Upper C-band). To ensure safe, efficient, and reliable aviation operations in the presence of wireless signals in the Upper C-band, the Federal Aviation Administration is proposing new regulations that would require all radio altimeters to meet specific minimum performance requirements. These new radio altimeters must withstand interference from wireless signals in neighboring spectrum bands and continue to provide accurate altitude readings to both pilots and integrated aircraft safety systems. The minimum interference tolerance requirements proposed in this rule reflect the best achievable interference rejection using current technology without compromising radio altimeter system performance. These regulations would require all aircraft equipped with radio altimeters operating under part 121 and those aircraft with radio altimeters operating under part 129 with 30 or more passenger seats or a payload capacity of more than 7,500 pounds to comply with the minimum performance requirements by the date the Federal Communications Commission authorizes wireless services in the Upper C-band. All other aircraft equipped with radio altimeters would be required to comply with the same minimum performance requirements two years later. This proposed rule is a companion to the Federal Communications Commission’s NPRM to expand the ecosystem for next-generation wireless services in the 3.7-4.2 gigahertz band by making as much as 180, and at least 100, megahertz of the Upper C-band available for terrestrial wireless flexible use via a system of competitive bidding.

This InFO serves to inform Title 14 of the Code of Federal Regulations (14 CFR) part 145 repair stations, part 65 mechanic certificate holders who maintain TCCA registered aircraft or articles and United States (U.S.) operators who may have maintenance performed on aircraft or articles in Canada that revision 2 of the FAA/TCCA MIP was signed on September 9, 2025, with an effective date of January 7, 2026. This revision supersedes and replaces FAA/TCCA MIP dated June 14, 2019.

This notice provides guidance related to the Corporate-Aviation
Safety Action Program (C-ASAP). This notice gives instruction and guidance to allow
corporations with eligible entities to establish a C-ASAP for their corporate Safety Management
Systems (SMS). A C-ASAP meets the requirement for a Title 14 of the Code of Federal
Regulations (14 CFR) § 5.71 Safety Assurance (SA) confidential reporting system.

This notice announces revisions to guidance on reviewing and
approving the use of noncertified weather observations in noncontiguous states. This notice
contains guidance that is pertinent to Title 14 of the Code of Federal Regulations (14 CFR)
§ 135.213.

This notice replaces notice N 8900.727, dated December 13, 2024.
This notice announces changes to regulations and guidance related to flight training, checking,
and testing in aircraft holding experimental and limited category airworthiness certificates. This
notice also informs inspectors of a revision to the A115 template in the Safety Assurance System
(SAS) Operations Safety System (OPSS) that must be issued to all current holders of Letter of
Deviation Authority (LODA) A115 (HQ Revision: 010 is replacing HQ Revision: 00a). This
notice announces revised Federal Aviation Administration (FAA) Order 8900.1, Volume 3,
Chapter 11, Section 1, Issue a Letter of Deviation Authority to Conduct Flight Training,
Checking, or Testing for Compensation or Hire in Aircraft Issued Limited Category or
Experimental Airworthiness Certificates, guidance associated with issuance of the new
LODA A115 (HQ Revision: 010). This notice also provides a letter to be used by the responsible
Flight Standards office as formal notification to all holders of LODA A115, HQ Revision: 00a.
Finally, this notice provides additional information related to the issuance of new LODAs for
current LODA holders

This notice contains guidance that is pertinent to Title 14 of the
Code of Federal Regulations (14 CFR) § 141.63 examining authority qualification requirements.

This notice provides guidance related to the use of a
government-issued driver’s license to satisfy identification requirements when applying for or
exercising the privileges of a certificate, rating, or authorization under Title 14 of the Code of
Federal Regulations (14 CFR) part 61, 63, 65, 67, 107, or 183.

This AC provides information
and recommendations to air carriers operating under the authority of Title 14 of the Code
of Federal Regulations (14 CFR) part 135 and in the noncontiguous States (i.e., Alaska
or Hawaii) on the use of noncertified weather information in support of instrument
approaches conducted under instrument flight rules (IFR) at airports without destination
weather reporting approved by the National Weather Service (NWS) or the Federal
Aviation Administration (FAA).