STC SR01741SE

Number SR01741SE

This certificate issued to Helicopter Transport Services, LLC 14497 Keil Road NE Aurora, OR 97002

Part 21.25(a)(2) and (b) of the Federal Aviation Regulations Original ProductType Certificate Number: H14NM Make: Helicopter Transport Services Model: CH-54B

Description of the Type Design Change: Installation of an upgraded Fuel Quantity Indicating System;

manufactured and installed in accordance with Master Drawing List OAS-455-MDL, Revision B, dated December 9, 2006, and maintained in accordance with Maintenance Manual Supplement HTIS-FQISICA-001, Revision IR, dated January 30, 2007, or later Federal Aviation Administration (FAA) approved revisions.

Limitations and Conditions: Approval of this change in type design applies to the above model rotorcraft only.

This approval should not be extended to other rotorcraft 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. Rotorcraft modified by this supplemental type certificate must be operated in accordance with an FAA approved copy of Helicopter Transport Services, Inc. Rotorcraft Flight Manual Supplement (RFMS). A copy of this certificate and the FAA approved RFMS must be maintained as part of the permanent records of the modified rotorcraft.

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.

Date of application: January 18, 2006 Date reissued: January 9, 2014 Date of issuance: March 2, 2007 Date amended:

FAA FORM 8110-2(10-68 PAGE 1 OF 2 PAGES

(Signature)

Manager, Seattle Aircraft Certification Office (Title)