STC SA01073SE

Number SA01073SE This certificate, issued to Clearwater Air, Inc.

1100 Merrill Field Dr.

Anchorage, AK 99501

Part 3 of the Civil Air Regulations.

Original ProductType Certificate Number: 2A4 Make: Twin Commander Model: 690A Description of the Type Design Change: Increase maximum ramp weight to 11,050 lbs. This increased weight is authorized only when operated under existing restricted category approval, dated April 6, 2000. The weight increase is to be used only for fuel. Maximum zero fuel weight remains at 8,750 lbs. If the aircraft is landed at a landing weight of more than 9,600 lbs., or if a takeoff is aborted at more than 10,250 lbs., an “Abnormal Ground Loads Inspection” will be accomplished prior to further flight, in accordance with Twin Commander 690A/690B Maintenance Manual Section XIII, pages 13-165 and 13-166.

Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in additional aircraft. This approval for change in type design is limited to Twin Commander 690A aircraft, Serial Numbers 11120 and 11338, Registration Numbers N57096 and N222ME, respectively. A copy of this certificate and FAA Approved Flight Manual Supplements, dated April 5, 2002, for N57096, and March 21, 2005 for N222ME, must be maintained as part of the permanent records for the modified aircraft. Airworthiness Directive compliance must be accomplished based on the intervals for survey usage, when given.

Date of application: March 8, 2002 Date reissued: February 23, 2015 Date of issuance: April 4, 2002 Date amended: March 25, 2005

(Signature)

Manager, Seattle Aircraft Certification Office (Title)