STC ST00174BO

Number ST00174BO This Certificate issued to Simmonds Precision Products, Inc.

d/b/a Goodrich Corporation Fuel and Utility Systems 100 Panton Road Vergennes, Vermont 05491

Part 25 of the Federal Aviation Regulations.

Original Product Type Certificate Number : A16WE Make : Boeing Company 737-200, -200C, -300, -400, -500, -600, -700, -700C, -800, and -900 Series Model :

Installation of Goodrich Corporation Float Switch Transient Suppression Device in accordance with Goodrich Corporation Master Drawing List, Document No. T3055-MDL-0101, Revision A, dated August 29, 2003, or later FAA-approved revision.

1. This approval must not be incorporated in any aircraft on which other previously approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of those aircraft.

2. Instructions for Continued Airworthiness (ICAW), Goodrich Document No. T3055-0005-01, Revision Init, dated July 21, 2003, or later FAA accepted revision, shall be made available to the operator at the time of installation.

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 : February 10, 2003

Date of issuance : August 27, 2003 Date reissued :

Date amended : February 3, 2004; June 2, 2004

( Signature) Robert G. Mann Manager Boston Aircraft Certification Office

( Title)