STC SA1009NW

Number SA1009NW

This certificate, issued to Air Mods N.W.

1424 Ridge Ave Snohomish, WA 98290

Part 23 of the Federal Aviation Regulations. effective February 1, 1965.

Original ProductType Certificate Number: A11EA Make: Gulfstream American (Grumman) Model: AA-1, AA-1A, AA-1B, AA-1C

Description of the Type Design Change: Installation of a dorsal fin (P/N 5302040-1) and associated assemblies in accordance with Kennis G. Blackman Installation Instructions No. KB 1040.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only.

This approval should not be extended to other aircraft of this model series unless the installer determines that the relationship between this change and any other previously incorporated approved modifications will introduce no adverse effect upon the airworthiness of that aircraft/rotorcraft. A copy of this certificate must be maintained as part of the permanent records of 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.

Date of application: March 31, 1980 Date reissued: August 20, 2019 Date of issuance: August 21, 1980 Date amended:

FAA FORM 8110-2 (5/14) PAGE 1 OF 2 PAGES

(Signature)

Manager, Seattle ACO Branch (Title)

Transfer the ownership of Supplemental Type Certificate Number

to (Name of Transferee)

(Address of Transferee)

(Number and Street)

(City, State, and ZIP Code)

from (Name of Grantor) (Print or Type)

(Address of Grantor)

(Number and Street)

(City, State, and ZIP Code)

Signature of Grantor (In Ink):

PAGE 2 OF 2 PAGES U.S. GPO: 1987-763-289