# STC SA993NW - Type: Supplemental type certificate - Status: Current, Amended - Holder: Air-Sea Enterprises, United States - Description: Installation of a Lycoming O-360-A1A engine, a McCauley 1A200-HFA/8041 propeller cowling, air inlet filter assembly, baffling, and Edo 248-2440 floats (with aileron/rudder interconnect) - Applied: March 13, 1980 - Status date: September 17, 1980 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS 1A6](https://openairdocs.org/tcds/1A6) - Certificate PDF: https://openairdocs.org/files/sha256/46/8c/468cf0cabcc90b66c057050b0579dc7a0eaa4175c836483cd709bc932fb97f01 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D4CE6D491754F07C86257A08004CAAAB.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA993NW ## ADs that name it (0) None. ## Approved models (1) - Piper Aircraft Inc. PA-22-160 ([TCDS 1A6](https://openairdocs.org/tcds/1A6)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA993NW This certificate issued to: Air-Sea Enterprises Part 3 of the CIViI Ait Kegulations: Original Product - Typebertificate Number: 1A6 Make: Piper Model: PA-22-160 McCauley 1A200-HFA/8041 propeller cowling, air inlet filter assembly, baffling, Description of Type Design Change: Installation of a Lycoming 0-360-ALA engine, a and Edo 248-2440 floats (with aileron/rudder interconnect) in accordance with Air-Sea Enterprises Installation Instructions ASE-1001. Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Piper PA-22-160 with extended wings and fuselage in accordance with STC SA819SW, Serial Number 22-6264 only. A copy of this Certificate and Addendum No. SA993NW shall be maintained as part of the permanent records Date of Application: March 13, 1980 Date Reissued: Date of Issuance: July 18, 1980 Lalcamended: September 17, 1980 FEDERAL AVIATION karelen TOMINIST ALO Chief, Engineering and Manufacturing Branch (Title) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Amended September 17, 1980 Number 5A993NW Supplemental Type Certificate ADDENDUM NO. SA993NW The conditions and limitations of Type Certificate Data Sheet Number 1A6 apply except where superseded by the following: Supplemental Type Certificate Data Sheet, which is part of STC SA993NW, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Civil Air Regulations. Supplemental Type Certificate HOLDER: Air-Sea Enterprises I. PA-22-160 4 PCLM/4 PCSM (NORMAL CATEGORY ONLY) AS MODIFIED BY STC SA993NW Engine: Lycoming 0-360-A1A Fuel: 91/96 minimum grade aviation gasoline Engine Limits: For all operations 2700 rpm (180 Hp) Propeller and Propeller Limits: McCauley 1A200-HFA/8041 Diameter: 80" maximum; 79" minimum AVOID CONTINUOUS OPERATION WHILE DESCENDING BETWEEN 1700 TO 2100 RPM Powerplant Instrument Markings: Tachometer: 2700 rpm (red line) maximum Oil Temperature Gauge: 245°F (red line) maximum Oil Pressure Gauge: 25 psi (red line) minimum 100 psi (red line) maximum 60 to 90 psi (green arc) normal operating range Fuel Pressure Gauge: .5 psi (red line) minimum 8 psi (red line) maximum 3 to 5 psi (green arc) normal operating range C. G. Range: Seaplane (Normal Category) (15.0) to (20.0) at 2000 pounds (12.0) to (20.0) at 1800 pounds 47 PAGE 3 OF 4PAGES FAA AC 73-2651 ## Every issue (1) - September 17, 1980: Amended, Current. [certificate](https://openairdocs.org/files/sha256/46/8c/468cf0cabcc90b66c057050b0579dc7a0eaa4175c836483cd709bc932fb97f01) --- 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.