STC SA4774NM

SA4774NM Widgeonworks LLC 1331 Saxon Dr #170 New Smyrna Beach, FL 32169 Part 4a Civil Air Regulations (See Continuation Sheet) A-734 Gruman G-44, G-44A, SCAN Type 30 The approval of this change in type design applies to Grumman Model G-44, G-44A, and those SCAN Type 30 airplanes listed by serial number in the Type Certificate Data Sheet. This approval should not be extended to aircraft of these models on which other previously approved modifications are incorporated (Limitations and Conditions continued on page 3 of 4) 03/30/1987 03/03/1993 01/29/2004 10/06/1989 ✔ Michael Linegang Manager, East Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 4 Removal of the two existing engines and installation of one AVCO Lycoming Model TIO-540-J2BD and one LTIO-540-J2BD engine with Hartzell Model HC-C3YR-2UF/FC9587A-10 and HC-C3YR- 2LUF/ FJC9587A-10 propellers in accordance with an FAA approved copy of Turbotech, Inc.

(Description of Type Design Change continued on page 3 of 4) 09/04/1997

SA4774NM 04/09/2026 4

SA4774NM 04/09/2026 Date Reissued continued:

November 30, 2009, August 04, 2010, April 09, 2026

Drawing List Report TT-7, dated September 28, 1989, or later FAA approved revision. Civil Air Regulations (CAR) Part 4a - Used CAR 4a as amended on 4/7/50, except that Section 7 of CAR 04, dated 7/1/44, was used for flight test performance and S 23.25(a)(2) was used instead of CAR 4a.723.

unless it is determined that the interrelationship between this change and any other previously approved modification will introduce no adverse effect on 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. In order for an airplane to be eligible for this installation it must: 1) meet the wing centersection conformity inspection criteria of Turbotech Report TT-6, dated 9/28/89, or later FAA approved revision, and: 2) meet the airplane useful loadcriteria of S

23.25(a)(2).

Airplanes equipped with this modification must be operated in accordance with an FAA approved copy of the new Airplane Flight Manual (AFM) for this installation, dated 10/6/89, or later F.M approved revision. NOTE: This FAA approved AFM currently applies only to those G-44, G-44A or SCAN Type 30 airplanes previously approved for operation at 5500 lbs. gross weight and which are equipped with 152 gallon fuel tank systems. Aircraft approved for operation at any other gross weight or which are equipped with any other fuel tank system arrangement will require further FAA approval and AFM revision.

For inspection, see the new AFM for limitations, placards and markings.

NOISE LEVEL - The corrected noise level of this aircraft is 79.6 dB(A) determined at the maximum normal rated power of2400 RPM and 38.0 inches of manifold pressure.

No determination has been made by the FAA that the noise levels of this airplane are or should be acceptable of unacceptable for operation at, into or out of, any airport.

SA4774NM 04/09/2026 The above statement notwithstanding, the noise level stated above has been verified by and approved by the FAA in noise level test flights conducted in accordance with Part 36, Appendix F "Noise Standards: Aircraft Type and Airworthiness Certification". The aircraft noise is in compliance with all Part 36 noise standards applicable to this type.

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