STC SR00836DE

United States of America AVIATION Department of Transportation Federal Aviation Administration OMINIS TRANS Supplemental Type Certificate Number: SRO0836DE This certificate issued to: Tandem Rotor, LLC 124 W. Pine Street Missoula, MT 59802 Part 29% of the Federal Aviation Regulations.

*Certification Basis defined on Continuation Sheet on Page 3 Original Product -Type Certificate Number: R0014DE Make: Tandem Rotor, LLC Model: CH-47D Description of Type Design Change:

Modification and Installation of the Pilot Left Seat Cyclic Stick and Thrust Lever Flight Controls in accordance with Federal Aviation Administration (FAA) approved Master Drawing Lists (MDLS) "CHI Modified Cyclic & Thrust Lever Install, L/H Side Only," Document Number: CHI-006-000, Revision IR, dated May 24, 2016, and "Offset Cyclic Stick," Document Number: CHI- 006-001, Revision IR, dated May 24, 2016, or later FAA approved revisions.

This installation should not be incorporated in any rotorcraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of that If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person Installation of a Bubble Window in accordance with Billings Flying Service STC SR00788DE is a prerequisite for this STC.

Both MDLs CHI-006-000 and CHI-006-001 must be installed concurrently.

FAA approved Flight Manual Supplement, Document Number TR-210-103, Revision Original, dated May 16, 2017 or later FAA approved revision must be provided with this STC.

6. Instructions for Continued Airworthiness, Document Number CHI-202-101, Revision IR, dated July 17, 2016, or later FAA accepted revision must be provided and maintained as a part of the permanent records for this aircraft.

Date of Application: October 26, 2016 Date Reissued:

Date of Issuance: May 25, 2017 Date Amended:

By Direction of the Administrator Signature Tarted Todd Dixon Title: Manager Denver Aircraft Certification Office Northwest Mountain Region

FAA Form 8110-2 (5/14) Page 1 of 3

United States of America Department of Transportation Federal Aviation Administration OMINISTRA Supplemental Type Certificate (Continuation Sheet) Number: SR00836DE Date of Issuance: May 25, 2017) Certification Basis:

Based on 14 CPR §9 21.113 and 21.101 the certification basis for the Modified Pilot Left Seat Cyclic Stick and Thrust Lever Flight Controls is as follows:

The type certification basis for Tandem Rotors CH-47Ds is shown on TCDS R0014DE for parts not changed or not affected by the change.

b. The certification basis for parts changed or affected by the change is 14 CFR part 29 dated February 1, 1965, including Amendments 29-1 through 29-20 and 14 CPR § 29.1529, Instructions for Continued Airworthiness, Amendment 20, effective October 11, 1980.

END The ST's supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is the property of the STC holder.

FAA Form 8110-2 (5/14) Page 3 of 3