STC SR00143DE

(See Continuation Sheet Page 3 of 3 Pages) FAA Form 8110-2 (03/21) SR00143DE Midwest Aerospace TC LLC 9465 Joliet Street St. John, IN 46373 7 the Civil Air Regulations * * * See attached FAA Approved Model List (AML) No. SR00143DE for list of approved rotorcraft models and applicable airworthiness regulations Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003 in accordance with Garlick Helicopters, Inc. Drawing GUI-94200, Revision A, dated August 11, 1994, or later FAA approved revisions.

November 8, 1993 July 10, 2007; February 4, 2009; February 8, 2023 February 1, 1995 January 26, 2012 for Manager, West Certification Branch

1. Compatibility of this design change with previously approved modifications must be determined by the installers.

2. If the holder agrees to permit another person to use this certificate, the holder shall give the other person written evidence of that permission.

3. A copy of this Certificate, Eligibility List, Flight Manual Supplement, and Maintenance Manual Supplement must be maintained as part of the permanent records of the aircraft.

FAA Form 8110-2 (03/21) SR00143DE

End FAA Form 8110-2 (03/21) Limitations and Conditions Continued:

SR00143DE

4. Garlick Helicopters Rotorcraft Maintenance Manual Supplement for the UH-1H or UH-1F model is required for this STC. Airworthiness Limitations FAA approved February 1, 1995, or later FAA approved of revisions are required.

5. Aircraft modified by this STC are limited for use per 14 CFR 21.93(b)(4) to:

a) Agricultural aircraft operations as defined in 14 CFR 137.3, effective January 1, 1996, and for dispensing of Fire Fighting Materials.

b) External Load Operations. Carrying of External Loads as defined in 14 CFR 133.1(b) effective December 20, 1976.