STC SA00481DE

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA00481DE This certificate issued to: Quiet Flight LLC 11740 Airport Way, Hanger 36E Broomfield, CO 80021 Part 23 of the Federal Aviation Regulations.

Original Product - Type Certificate Number: 2A4 Make: Twin Commander Model: Model: 560-F, 680, 680-E, 680-F, 720, 680FL, 680FL(P), 680T, 680V, 680W, 681, 685, 690, 690A, 690B, 690C, 690D, 695, 695A, 695B Description of Type Design Change:

Installation of an Aircraft Noise Control (ANC) System in accordance with Master Data List for Twin 2002, or later FAA approved revision. Commander 690, Document No. 142401257, revision C, dated July 01, 2002, FAA approved September 24, Limitations and Conditions:

1. Compatibility of this design change with previously approved modifications must be determined by installer.

2. A copy of this certificate and FAA approved Airplane Flight Manual Supplement, Document No. 142401269, Revision A, dated September 24, 2002, or later FAA approved revision must be maintained as part of the permanent records of the modified aircraft.

3. Instructions for Continued Airworthiness, Document No. 900000003, entitled, SRC360 Active Noise Cancellation System", Revision E, dated May 29, 2002, or later FAA accepted revision is required for this installation.

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: March 5, 2002 Date Reissued:

Date of Issuance: September 25, 2002 Date Amended:

FEDER By Direction of the Administrator Melissa Sandow (Signature) Small Airplane Program Manager Melissa findow OMINIST RATION Northwest Mountain Region Denver Aircraft Certification Office (Title)