STC SE825NE

This Certificate issued to: Pratt & Whitney 400 Main Street.

East Hartford, CT 06108

Part 33 of the Federal Aviation Regulations.

Description of Type Design Change: PW Thrust Reverser identified by the following assemblies: Pratt & Whitney Part Number 70M001, Notice of Revision D/005 – Fan Thrust Reverser Assembly; Pratt & Whitney Part Number 70M002, Notice of revision B002 – Isolation Valve Assembly; Pratt & Whitney Part Number 70M003, Notice of Revision B/002- Filter Assembly; Pratt & Whitney Part Number 76A008, revision C – Primary Exhaust Nozzle Assembly; Pratt & Whitney Part Number 75A001, Revision E – Tailcone Assembly. These assembly part numbers include the fan thrust reverser, primary nozzle/plug assembly and the hydraulic actuation power drive installation.

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.

surrendered, revoked, or a termination date is other wise established by the Administrator of the Federal Aviation Administration.

E36NE Make : PRATT & WHITNEY Model : PW4164, PW4168, PW4168A, PW4164C, PW4164C/B, PW4164-1D, PW4168-1D, PW4168A-1D, PW4164C-1D, PW4164C/B-1D, PW4170 Date of application February 04, 1991 Date of issuance : May 23, 1993

Date reissued: February 2, 1998

Date amended: November 25, 2008

(Signature) Diane M. Cook Manager, Engine Certification Branch, ANE-142 Engine Certification Office

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