STC SA00403DE

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA00403DE This certificate issued to: West Star Aviation, Inc.

796 Heritage Way Grand Junction, Colorado 81506-8643 Purt. 23 of the Federal Aviation Regulations.

Original Product Type Certificate Number : AIWI Make: Cessna Aircraft Company Model: 525 Description of Type Design Change:

Installation of the Puritan Bennett Sweep On 2000 Crew Oxygen Masks in accordance with West Star Aviation Inc. Master Document List Number 500240351002, Revision A, dated November 30, 1999 or later FAA approved revisions.

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

2. This modification did not increase the noise level and was not considered an acoustical change as defined in paragraph 21.93(b) of the Federal Aviation Regulations.

Date of Application: November 20, 1999 Date Reissued:

Dule of issuunce : December 6, 1999 Date Amended:

FEDERAL AVIATION By direction of the Soda could i In (Signature) Ronald F. May TOMNISTRATO Manager, Denver Aircraft Certification Office Northwest Mountain Region (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA00103DE Date of Issuance: December 6, 1999 Limitations and Conditions: (Continued):

2. Weight & Balance and C.G. data is altered by 3.68 Ibs. at 150 inches as noted in West Star Aviation, Inc. Document Number 50024035100-WB1, Revision IR, dated March 1, 1999.

3. FAA Approved Airplane Flight Manual Supplement for West Star Aviation, Inc. Puritan Bennett Sweep On 2000 Crew Oxygen Masks installed in a Cessna Citation Model 525 with the 50 Cubic Foot Oxygen Containers, Document Number 5002403514006 dated and approved December 6, 1999, or later FAA approved revisions, and is required and must be maintained as a part of the permanent records for each aircraft.

5. A copy of this certificate, and the Instructions for Continued Airworthiness as addressed in West Star Aviation, Inc. Maintenance Supplement Report Puritan Bennett Sweep On 2000 Crew Mask Installation Document Number 5002403514003, Revision A, dated November 30, 1999, is required and must be maintained as a part of the permanent records for each aircraft.

6. 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.

..End.….

FAA FORM 8110-2-1 (10-69) PAGE 3 of 3 PAGES