STC SH4173NM

Number SH4173NM

This certificate, issued to: Simplex Manufacturing Company 13340 NE Whitaker Way Portland, OR 97230

Part * of the * Regulations.

Original ProductType Certificate Number: * See Attached Approved Model List Number Make: SH4173NM for List of Approved Helicopter Models Model: and Applicable Airworthiness Regulations

Description of the Type Design Change: Installation of Simplex Model 7600 modular electrical system in accordance with Simplex Drawing List entitled “Model 7600 Electrical System,” Revision A, dated January 08, 1988, or later FAA-approved revision.

Limitations and Conditions: Approval of this change in type design applies to the above model helicopters only. This approval should not be extended to other helicopters 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 I type design, will introduce no adverse effect upon the airworthiness of that helicopter.

A copy of this Certificate and Approved Model List (AML) must be maintained as part of the permanent records for the modified helicopter.

Date of application: November 30, 1987 Date reissued:

Date of issuance: February 18, 1988 Date amended:

FAA FORM 8110-2-1 (10-69)

(Signature) Manager, Seattle Aircraft Certification Office (Title) Original Signed by William B. Ashworth