STC SA531NW

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Nimber SA531NW This certificate issued to: JACK SHANNON Purt 3 of the CiViI Air Regulations:, Dated November 1, 1949, As Amended by 3-1 Through 3-12 Original Product -Typo-bertificate Number: 3A12 Make: Cessna Model: 172 and 172A and 172B Description of Type Design Change: Installation of a Cee Bailey (one-piece) plexiglass windshield (item No. 63R) in accordance with Shannon Aerodynamic Engineering and Installation Instructions as amended October 6, 1977.

Similulionsund Conditions Approval of this change in type design applies basically to the above model aircraft only. This approval should not be extended to other aircraft 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 aircraft. A copy of this Certificate shall be maintained as part of the permanent Tie ordi/cate a the desa freding see attich is the basis for approval shall remain in effet until sur rendered, suspended, revcked, or a termination date is thorwise is tablished by the Sidministrater of the Federal Aviation Administration .

Jule sf upplication: September 22, 1977 Date Reissued:

Date of Issuance: October 12, 1977 Date Amended:

FEDERAL AVIATION Chards & Ahoeder (Signature)

TOHINISTRATO Chief, Engineering and Manufacturing Branch (Title)