# STC SA00280BO - Type: Supplemental type certificate - Status: Current, Amended - Holder: PK Floats Inc, United States - Description: Installation of PK 2250A Amphibious Floats. - Applied: September 11, 2007 - Status date: March 9, 2012 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 21, Part 23 - Data sheets: [TCDS A22NM](https://openairdocs.org/tcds/A22NM) - Certificate PDF: https://openairdocs.org/files/sha256/3d/45/3d454f029fbfec27037af2970768b3e25f03c9745a2f1897dd57239effd2689d - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BA9956F15A073ADB862579C300684EE9.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA00280BO ## ADs that name it (0) None. ## Approved models (5) - Sky International Inc. A-1 ([TCDS A22NM](https://openairdocs.org/tcds/A22NM)) - Sky International Inc. A-1A ([TCDS A22NM](https://openairdocs.org/tcds/A22NM)) - Sky International Inc. A-1B ([TCDS A22NM](https://openairdocs.org/tcds/A22NM)) - Sky International Inc. A-1C-180 ([TCDS A22NM](https://openairdocs.org/tcds/A22NM)) - Sky International Inc. A-1C-200 ([TCDS A22NM](https://openairdocs.org/tcds/A22NM)) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. 32 Flyaway Drive Lincoln, ME 04457 Part 23 (see page 3 of 5) of the Federal Aviation Regulations. Original Product Type Certificate Number : A22NM Make : Sky International Model : A-1, A-1A, A-1B, A-1C-180, A-1C-200 Installation of PK 2250A Amphibious Floats in accordance with PK Floats Drawing List 22DL1100, Initial revision, dated October 24, 2008, or later FAA-approved revision. 1. PK Floats, Inc. Airplane Flight Manual Supplement for Sky International Model A-1 with PK 2250A Amphibious Floats, Initial revision, dated November 7, 2008, or later FAA-approved revision, is required. 2. PK Floats, Inc. Airplane Flight Manual Supplement for Sky International Model A-1A with PK 2250A Amphibious Floats, Initial revision, dated November 7, 2008, or later FAA-approved revision, is required. (Limitations and Conditions continued on page 3 of 5) 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 : September 11, 2007 Date of issuance : November 7, 2008 Date amended : March 9, 2012 ( Signature) Robert G. Mann Manager Boston Aircraft Certification Office ( Title) FAA Form 8110-2-1(10-69) Page 3 of 5 Number SA00280BO Effective Date: March 9, 2012 Limitations and Conditions Cont’d: 3. PK Floats, Inc. Airplane Flight Manual Supplement for Sky International Model A-1B/C with PK 2250A Amphibious Floats, revision A , dated March 9, 2012, or later FAA-approved revision, is required. 4. Instructions for Continued Airworthiness, PK Floats, Inc. document # 2250A, Initial Revision, dated October 31, 2008, or later FAA-accepted revision, shall be made available to the operator at the time of installation. 5. This STC does not apply to Engine Options Group Configurations of the Model A-1B. 6. The installation should not be incorporated in any aircraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft. 7. The weight increase to 2250 lbs for the A-1B and A-1C with PK 2250A Amphibious Floats is valid for serial numbers 2285, 2288 and greater only. The applicable portions of Sky International Service Letter No. 3 must be applied to the A-1B to support the weight increase. Certification Basis: The type certification basis for Aviat Model A-1, A-1A, A-1B, A-1C-180, A-1C-200 airplanes as shown on TCDS A22NM is modified for this STC as follows: Equivalent Level of Safety Finding has been made for the following regulation: 14 CFR §23.777(e), Cockpit controls (documented in ELOS Memorandum ACE-08-20) Type Certificate Data Sheet: Sky International TCDS A22NM is modified for this STC as follows: Model A-1 Propeller and Propeller Limits Diameter: Not over 76 in., not under 76 in. Airspeed Limits (IAS) Never Exceed 133 mph (116 knots) Maximum Structural Cruising 104 mph (90 knots) Maneuvering 91 mph (79 knots) Flaps Extended 73 mph (63 knots) C.G. Range Amphibian (+75.7) to (+78.4) at 1980 lbs (+72.5) to (+78.4) at 1500 lbs and below Straight line variation between points given Maximum Baggage 50 lbs (+120.0) 50 lbs (+66.0) Stowag e compartment in each float Maximum Weight Landplane: 1800 pounds Amphibian: 1980 pounds FAA Form 8110-2-1(10-69) Page 4 of 5 Number SA00280BO Effective Date: March 9, 2012 Model A-1A Propeller and Propeller Limits Diameter: Not over 76 in., not under 76 in. Airspeed Limits (IAS) Never Exceed 133 mph (116 knots) Maximum Structural Cruising 104 mph (90 knots) Maneuvering 91 mph (79 knots) Flaps Extended S/N 1395 to 1429 73 mph (63 knots) S/N 1430 and up 80 mph (70 knots) (See TCDS A22NM, Note 14) C.G. Range Amphibian (+75.5) to (+78.4) at 2079 lbs (+72.5) to (+78.4) at 1500 lbs and below Straight line variation between points given Maximum Baggage 50 lbs (+120.0) 50 lbs (+66.0) Stowag e compartment in each float Maximum Weight Landplane: 1890 pounds Amphibian: 2079 pounds Model A-1B Propeller and Propeller Limits Diameter: Not over 76 in., not under 76 in. Airspeed Limits (IAS) Never Exceed 133 mph (116 knots) Maximum Structural Cruising 104 mph (90 knots) Maneuvering 91 mph (79 knots) Flaps Extended 80 mph (70 knots) C.G. Range Amphibian (+75.0) to (+80.0) at 2250 lbs. (+72.3) to (+80.0) at 1765 lbs. and below Straight line variation between points given Maximum Baggage 50 lbs (+120.0) 50 lbs (+66.0) Stowag e compartment in each float Maximum Weight Landplane: 2000 pounds Amphibian: 2250 pounds FAA Form 8110-2-1(10-69) Page 5 of 5 Number SA00280BO Effective Date: March 9, 2012 Model A-1C-180 Propeller and Hartzell HC-C2YK-1BF/F766A (Constant Speed) Propeller Limits Diameter not over 76 in., not under 76 in. Airspeed Limits (IAS) Never Exceed 133 mph (116 knots) Maximum Structural Cruising 104 mph (90 knots) Maneuvering 91 mph (79 knots) Flaps Extended 80 mph (70 knots) C.G. Range Amphibian (+75.0) to (+80.0) at 2250 lbs. (+72.3) to (+80.0) at 1765 lbs. and below Straight line variation between points given Maximum Baggage 50 lbs (+120.0) 50 lbs (+66.0) Stowag e compartment in each float Maximum Weight Landplane: 2250 pounds Amphibian: 2250 pounds Model A-1C-200 Airspeed Limits (IAS) Never Exceed 133 mph (116 knots) Maximum Structural Cruising 104 mph (90 knots) Maneuvering 91 mph (79 knots) Flaps Extended 80 mph (70 knots) C.G. Range Amphibian (+75.0) to (+80.0) at 2250 lbs. (+72.3) to (+80.0) at 1765 lbs. and below Straight line variation between points given Maximum Baggage 50 lbs (+120.0) 50 lbs (+66.0) Stowag e compartment in each float Maximum Weight Landplane: 2250 pounds Amphibian: 2250 pounds -END- ## Every issue (2) - March 9, 2012: Amended, Current. [certificate](https://openairdocs.org/files/sha256/3d/45/3d454f029fbfec27037af2970768b3e25f03c9745a2f1897dd57239effd2689d) - November 7, 2008: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/ca/dd/caddcc7546ef243a418cab85bdfe1dc1fe7d7993a2f0ad3b0932fec510483fdb) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.