STC SR00350DE

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number SRO0350DE This certificate issued to: Rocky Mountain Holdings, L.L.C.

800 South 3110 West Provo, UT 84601 Part 29 of the Federal Aviation Regulations.

Original Product -Type Certificate Number: H13EU Make: Messerschmitt-Bolkow-Blohm, GMBH Model: BK 117, A-1, A-3, A-4, B-1, B-2, C-1 Description of Type Design Change:

Installation of a Co-Pilot Control Covers in accordance with Rocky Mountain Helicopters Master Drawing List, Document No. MDL-054098, Rev. IR, dated May 4,1998, FAA Approved July 2, 1998 or later FAA approved revision.

1. FAA Approved Rotorcraft Flight Manual Supplement dated July 2, 1998 or later approved revision is required.

2. This approval should not be extended to rotorcraft of this model 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, including changes in type design, will introduce no adverse effect upon the airworthiness of that rotorcraft.

3. A copy of this Certificate and FAA Approved Rotorcraft Flight Manual Supplement, dated July 2, 1998 or later FAA approved revision must be maintained as part of the permanent records for the modified rotorcraft.

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.

Date of Application: May 21, 1998 Date Reissued: January 15, 2001 Date of Issuance: July 2, 1998 Date Amended:

FEDERAL By Direction of the Administrator David T. Grossman (Signature) Rotocraft Program Manager HO MINISTRATION Northwest Mountain Region Denver Aircraft Certification Office (Title)