STC SE00027EN

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Ninter SE00027EN This certificate issued to: . Pratt & Whitney Engine Services, Inc.

249 Vanderbilt Ave.

Norwood, MA 02062 Part 33 of the Federal Aviation Regulations.

Original Product Type Certificate Number: E4CE Make: Rolls Royce Allison Engine Company (Formerly Allison Engine) Model: 250-C10, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C19, 250-C18B, 250-C18C, 250-C20, 250-C20B, 250-C20C, 250-C20F, 250-C2OJ, 250-C2OS, 250-C20R, 250-C20R/1, 250-C2OR/2, 250 C20R/4, 225-C10, 225-C10A and 250-C20W Description of Type Design Change: Installation of Pratt & Whitney Engine Services, Inc. IntelliStart Plus +™ Electronic Control Unit (ECU), P/N DPU-K-010 on the specified 250 engine models. Airframe installation of the Pratt & Whitney Engine Services, Inc. IntelliStart Plus +™ to be accomplished in accordance with applicable airframe STC.

Limitations and Conditions: 1) The IntelliStart Plus +T ECU is designed to limit start temperatures and to provide an electronic aid for recording engine trend and cycle data. 2) The IntelliStart Plus +™M ECU is designed as non-essential, ground use only equipment and cannot be used to replace pilot monitoring during start as required by FAA approved operating instructions for the aircraft. This system does not eliminate any Rotorcraft Flight Manual monitoring requirements or limitations during engine starts or the requirement for manual recording of engine operating data required by the FAA approved operating specifications or maintenance programs. 3) This approval shall not be incorporated in any engines of these models on which other previously approved modifications are incorporated, unless it is determined that the inter-relationship between this change and any previously approved modification will introduce no adverse effect upon the airworthiness of those aircraft. 4) 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.

(City Date of Application: December 07, 1998 Date Reissued: August 21, 2002, November 1, 2005, October 22, 2007 Date of Issuance: January 19, 2000 Date Amended:

FEDERAL AVIATION By Direction of the Administrator • (Signature) Diane M. Cook TOMINISTRATO Manager, Engine Certification Branch Aircraft Certification Office (Tile) Any alt.

FAA Form 81