STC SR02341AT

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number SRO2311AT This certificate issued to: Enviro Systems, Inc.

4000 Hwy. 99 N.

Seminole, OK 74868 Certifies that the change in the type design for the fotloving product with the limitations and conditions therefore as specified horeon nods the aimoorthiness myuinnents of! Part 27 of the Federal Aviation

•Regulations Original Product Type Certifionte Number: ROOOIRD Monks: Eurocopter France Model: EC120B Description of Type Design Change:

Installation of an Aero Aire Corporation Vapor Cycle Air Conditioning System per Aero Aire Master Drawing List 120TA000- 1R015, Rev. A, dated 5-8-01, or later FAA approved revision.

Limitations and Conditions: 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 other previously approved modifications will produce no adverse effect upon the airworthiness of that 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.

FAA Approved Airplane Flight Manual Supplement Aero Aire part number 120TA000-1R070, Rev. IR, dated July 2, 2001, is required part of this STC.

This sertifioate and the supporting duetu cahich is tho hesis for appoceel shull remin in effect until surrendered suspended monked or a termination date is otheroise stublished by the Administrator of the Dude of appliontion: February 01,2001 EntA MAident : September 23, 2001, June 20,2003 Date of Issuance: July 02,2001 Federal Aviation Administration .

EDERAL AVIATION Bey dimchion of the Arminsidrator Eugene L. Bollin (Signature ) ADMI 0 Melvin D. Taylor Manager Atlanta Aircraft Certification Office (Title) this ce exceeding $1,000, or imprisonment not exceeding 3 years, or boch FAA FORM HI:! cificate may o• accordanco with FAR 21