STC SA4-1637

SA4-1637 TALCO Aviation 3015 E. New York St, STE A2-270 Aurora, IL 60504 Part 3 the Civil Air Regulations 1A10 Piper PA-23 and PA-23-160 Installation of Turbocharged Lycoming O-320-A or -B Series engines in accordance with FAA Sealed Roto-Master (Rajay) Project Drawing List No. 1 or later, FAA approved revision.

(See continuation sheet 3 of 3) February 7, 1961 1/6/64; 1/14/69; 2/10/82; 10/30/87; 9/22/95; 1/16/04; 7/3/06; 3/16/07;

3/5/18; 2/2/2021; 8/31/2023 December 5, 1961 May 1, 1962; March 21, 1985 for Paul (Vu) Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3

SA4-1637 3

SA4-1637 Date of Issuance: December 5, 1961 Date Amended: March 21, 1985 Date of Reissuance: August 31, 2023

The engine must be previously modified to incorporate turbochargers in accordance with STC SE4-1638. The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission. FAA approved Roto-Master (Rajay) Airplane Flight Manual Supplement dated December 4, 1961, or later FAA approved revision is required with the installation.

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