FAA Notice N 8900.747 FAA-Approved Deicing Program for Winter 2025–2026

This notice provides inspectors with information on the Federal Aviation Administration (FAA)-approved deicing program for Winter 2025–2026. This notice is designed to be used in conjunction with the FAA Holdover Times (HOT), Degree-Specific Holdover Times (DSHOT), Regression Data, and Allowance Time Guidelines for Winter 2025–2026. This notice replaces Notice N 8900.708, FAA-Approved Deicing Program for Winter 2024–2025, which expired on August 2, 2025. This notice contains guidance that is pertinent to Title 14 of the Code of Federal Regulations (14 CFR) §§ 121.629(c), 125.221(b), and 135.227(b)(3).

FAA AC 91-94 Update, Application and Issuance Process for a Letter of Deviation Authority Issued in Accordance With 14 CFR § 91.326

This AC provides information
and guidance on the application and issuance process for obtaining a Letter of Deviation
Authority (LODA) to operate certain aircraft holding limited category and experimental
Special Airworthiness Certificates for compensation or hire while providing flight
training, checking, or testing. The Federal Aviation Administration (FAA) has the
regulatory authority to issue a LODA in accordance with Title 14 of the Code of Federal
Regulations (14 CFR) §§ 91.315, 91.319, and 91.326.

TSO-C63g, Airborne Weather Radar Equipment

his technical standard order (TSO) is for manufacturers applying for a TSO
authorization (TSOA) or letter of design approval (LODA). In it, we (the Federal Aviation
Administration, (FAA)) tell you what minimum performance standards (MPS) your airborne
weather radar equipment must meet for approval and identification with the applicable TSO
marking. This TSO addresses weather detection and ground mapping, forward-looking
windshear detection, forward-looking turbulence detection, atmospheric threat awareness
capability, and high-altitude ice crystal detection. It does not include flight guidance system
functionality in support of an approved windshear detection and avoidance system