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6HHH&RQWLQXDWLRQQ6KHHWW3DJHHRII3DJHV SA00734LA Aerospace Welding Minneapolis, Inc.

3344 Highway 149 Eagan, MN 55121 3* Civil Air Regulations *Certification basis is set forth in Type Certificate Data Sheet 1A10 Piper PA-23-250 (S/N 27-2505 and up) Installation of a modified exhaust system in accordance with Knisley Welding, Inc. Manufacturing Drawing List #5, Revision NC, dated January 27, 1999, or later FAA Approved revision.

Approval of this change in type design applies to the above aircraft model(s) only. This approval should not be extended to 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 will introduce no advese effect upon the airworthiness of that aircraft. A copy of this Certificate must be maintained as part of the permanent records for the modified aircraft.

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.

August 31, 1998 November 17, 2023 February 19, 1999 for Manager, West Certification Branch 3

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((QG SA00734LA Limitations and Conditions (Continued):

NOTE 1: This modification requires Lycoming alternator bracket P/N 77756 and Lycoming swing arm P/N 75380.

NOTE 2: Noise characteristics: This modification is not considered an "acoustical change" as defined in § 21.93(b), Amendment 21-75 of the Federal Aviation Regulations.