STC SA4387NM

United States of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate This certificate has been reissued to replace the original certificate reported lost.

Number SA4387NM

This certificate, issued to Air Mods N.W.

1424 Ridge Ave Snohomish, WA 98290

Part 23 of the Federal Air Regulations, dated February 1,1965 Original ProductType Certificate Number: A11EA Make: Gulfstream American Model: AA-1, AA-1A, AA-1B, and AA-1C

Description of the Type Design Change: Installation of a Lycoming 0-320-A, C or E Series engine and Sensenich 74DM6-0-58/64 or 74DM7-0-58/64 propeller, in accordance with Drawing List No. KD-320-DL, dated January 20, 1989, or later FAA approved revision, together with a 5% increase in takeoff gross weight for each model aircraft. An option of this modification is the installation of main gear fairings in accordance with Supplemental Drawing List KD-320-FO, which is a part of Drawing List KD-320-DL.

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 appro ved modifications will introduce no adverse effect upon the airworthiness of that aircraft. 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: January 26, 1987 Date reissued: August 20, 2019 Date of issuance: February 28, 1989 Date amended: June 4, 1991; June 13, 1991

FAA FORM 8110-2 (5/14) PAGE 1 OF 4 PAGES By direction of the Administrator

(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):

U.S. GPO: 1987-763-289

United States of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate This certificate has been reissued to replace the original certificate reported lost.

Number SA4387NM Air Mods N.W.

Issued: February 26, 1987 Reissued: August 20, 2019 Amended: June 4, 1991; June 13, 1991 Limitations and Conditions continued:

The weight/center of gravity envelope KD-320-LG-1, -2, -3, or -4 must be attached to the permanent weight and balance data for the Model AA-1, AA-1A, AA-1B, and AA-1C aircraft, respectively.

The conditions and limitations of Type Certificate Data Sheet (TCDS) No. A11EA are applicable except where superseded by the following:

This supplemental TCDS, which is part of STC No. SA438NM, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Federal Air Regulations.

SUPPLEMENTAL TYPE CERTIFICATE HOLDER: Air Mods N.W.

Models AA-1A and AA-1A (Normal/Utility Category) and Models AA-1B and AA-1C (Utility Category) as modified by STC No. SA438NM Engine: Lycoming 0-320-A, C, or E Series Fuel: 80/87 minimum grade aviation gasoline Engine Limits: 2700 RPM (150Hp) for all operations Propeller and Propeller Limits: Sensenich 74DM6-0-58/64 or 74DM7-0-58/64 fixed pitch propeller.

Static RPM at maximum permissible throttle setting: 58” pitch - not over 2225, not under 2075; 64” pitch - not over 2075, not under 1900. Diameter: Not over 74”; not under 72”.

C.G. Range: No change Maximum Gross Weight:

Model Landing Takeoff AA-1 AA-1A AA-1B AA-1C

1500 lb.

1500 lb.

1500 lb.

1600 lb.

1579 lb.

1579 lb.

1642 lb.

1684 lb.

FAA FORM 8110-2 (5/14) PAGE 3 OF 4 PAGES

United States of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate This certificate has been reissued to replace the original certificate reported lost.

(Continuation Sheet) Number SA4387NM Air Mods N.W.

Issued: February 28, 1989 Reissued: August 20, 2019 Amended: June 4, 1991; June 13 1991 Limitations and Conditions continued:

Oil Capacity: 8 quarts

Instrument Markings: Oil Pressure -No change Oil Temp. -No change Cylinder Head Temp -No change Tachometer (Red Radial) -AA-1, -1A, –B; @ 2700 RPM -AA-1C; No change Placards: (a) Aft of fuel Filter (AA-1C only):

(b) In full view of the pilot (for specified airplane)

-OR-

-OR-

-OR-

FAA FORM 8110-2 (5/14) PAGE 4 OF 4 PAGES

Fuel Min. 80/87 OCT TAKEOFF GROSS WEIGHT FOR THE AA-1 WITH STC SA4387NM INSTALLED, NORMAL CATEGORY, IS 1579 POUNDS. LANDING WEIGHT – 1500 POUNDS.

TAKEOFF GROSS WEIGHT FOR THE AA-1A WITH STC SA4387NM INSTALLED, NORMAL CATEGORY, IS 1579 POUNDS. LANDING WEIGHT – 1500 POUNDS.

TAKEOFF GROSS WEIGHT FOR THE AA-1B WITH STC SA4387NM INSTALLED, NORMAL CATEGORY, IS 1642 POUNDS. LANDING WEIGHT – 1560 POUNDS.

TAKEOFF GROSS WEIGHT FOR THE AA-1C WITH STC SA4387NM INSTALLED, NORMAL CATEGORY, IS 1684 POUNDS. LANDING WEIGHT – 1600 POUNDS.