STC SR02761LA

SR02761LA Northern X-Treme Helicopters 7181 Howards Crossings Rd.

Kelsey, CA 95667 Part 27 the Code of Federal Regulations See FAA Approved Model List (AML) SR02761LA See FAA AML SR02761LA See FAA AML SR02761LA Installation of UH-1H composite main rotor blades on the UH-1B helicopters in accordance with approved Northern X-Treme Helicopters documentation listed on AML No. SR02761LA, dated March 22, 2022, or later FAA approved revisions.

Approval of this change in type design applies to the aircraft models listed on AML No. SR02761LA only. This approval should not be extended to aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft.

(continued) August 1, 2020 March 22, 2022 Manager, Airframe Section Los Angeles ACO Branch 3

SR02761LA 3

SR02761LA Limitations and Conditions (Continued):

A copy of this Certificate and FAA Approved Model List (AML) No. SR02761LA, dated March 22, 2022, or later FAA Approved revision, must be maintained as part of the permanent records for the modified aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

This installation requires the rotorcraft to be previously modified with tailboom 24” plug extension in accordance with STC SR00026DE and Lycoming T53-L-13 engine in accordance with STC SR00073DE.