STC SR01839AT

FFAA Form 8110-2 (03/21) Page 1 of ___ SR01839AT Thoroughbred Aviation Maintenance, Inc.

4316 Hangar Drive Lexington, KY 40510 Part 6 Civil Air Regulations H3WE McDonnell Douglas 369 Series; 500N; 600N Installation of Cyclic Friction Release Levers in accordance with Heli-Tech Inc. Installation Instructions for McDonnell Douglas 369 series, 500N and 600N helicopters, HT301 Friction Release Levers, Revision B, date March 3, 1999, or later FAA approved revision This approval should not be extended to other rotorcraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of these other approved modifications will produce no adverse effect upon the airworthiness of that rotorcraft. If the holder of this STC agrees to permit (see continuation sheet 3) April 10, 1998 February 25, 2022 February 18, 1999 March 22, 2000 (for) Christina M. Underwood Manager, Atlanta ACO Branch 3

4316 Hangar Drive Lexington, KY 40510 3

FAA Form 8110-2 (03/21) Page ___ of ___ SR01839AT Limitations and Conditions (continued) another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. The FAA approved Rotorcraft Flight Manual Supplement dated March 29, 2000 or later FAA approved revision is a required part of the STC.

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