# STC SA418NW - Type: Supplemental type certificate - Status: Current, Amended - Holder: Jobmaster Company Inc, United States - Description: Installation of a float spreader assembly. - Applied: February 14, 1977 - Status date: June 28, 1988 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS 7A12](https://openairdocs.org/tcds/7A12), [TCDS TC 679](https://openairdocs.org/tcds/TC%20679), [TCDS A-717](https://openairdocs.org/tcds/A-717), [TCDS 7A15](https://openairdocs.org/tcds/7A15), [TCDS 1A10](https://openairdocs.org/tcds/1A10), [TCDS A-806](https://openairdocs.org/tcds/A-806) - Certificate PDF: https://openairdocs.org/files/sha256/b6/69/b669cea155929f774b1589a6015f7090c92ce4f29fb7715dfc0973dc21879ba7 - Approved model list and other attachments: [AML_SA418NW.pdf](https://openairdocs.org/files/sha256/74/a2/74a2d0a60ad9cd894f7408382b4d545da101ad32a09ab08a56aac25f3493f5a8) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/490467C745CC16CE85256CC2000E3A40.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA418NW ## ADs that name it (0) None. ## Approved models (12) - Aeronautica Macchi S.p.A. AL 60-C5 ([TCDS 7A12](https://openairdocs.org/tcds/7A12)) - Aeronautica Macchi S.p.A. AL 60-F5 ([TCDS 7A12](https://openairdocs.org/tcds/7A12)) - Consolidated Vultee Aircraft Corporation Stinson Division SR-10D ([TCDS TC 679](https://openairdocs.org/tcds/TC%20679)) - Consolidated Vultee Aircraft Corporation Stinson Division SR-10E (Army UC-81H) ([TCDS TC 679](https://openairdocs.org/tcds/TC%20679)) - Consolidated Vultee Aircraft Corporation Stinson Division SR-10K ([TCDS TC 679](https://openairdocs.org/tcds/TC%20679)) - Howard Aircraft Foundation DGA-15P (Army UC-70; Navy GH-1; -2; -3; NH-1) ([TCDS A-717](https://openairdocs.org/tcds/A-717)) - Pilatus Aircraft Limited PC-6-H2 ([TCDS 7A15](https://openairdocs.org/tcds/7A15)) - Pilatus Aircraft Limited PC-6/350-H2 ([TCDS 7A15](https://openairdocs.org/tcds/7A15)) - Pilatus Aircraft Limited PC-6/A-H2 ([TCDS 7A15](https://openairdocs.org/tcds/7A15)) - Pilatus Aircraft Limited PC-6/B-H2 ([TCDS 7A15](https://openairdocs.org/tcds/7A15)) - Piper Aircraft Inc. PA-23-250 ([TCDS 1A10](https://openairdocs.org/tcds/1A10)) - Viking Air Limited DHC-2 Mk.I ([TCDS A-806](https://openairdocs.org/tcds/A-806)) ## 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 SAA18NW This certificate issued to: Jobmaster Company, Inc. Purt * of the Regulations. Original Product -Type Certificate Number: * *See attached Approved Model List (AML,) Make: * No. SA418NW for list of approved aircraft models and applicable airworthiness Model: * regulations Description of Type Design Change: Installation of a float spreader assembly in accordance with Jobmaster Company Document JB77, Revision A, or Document JB77A, or later FAA approved revisions. NOTE: This installation is applicable to Edo float models 58-4580, 679-4930, 59-5250, and 61-5870 only. Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate and Approved Model List (AML) No. SA418NW must be maintained as part of the permanent records for the modified Date of Application: February 14, 1977 Date of Issuance: Apri1 19, 1977 FEDERAL AVIATION Date Reissued: Date Amended: July 6, 1977; June 28, 1988 Hey dination the cheminister 2. Keen TOMINISTRATO Asst. Manager, Seattle Aircraft Certification Office (Title) ### AML_SA418NW.pdf This is OCR from the scanned FAA attachment. OCR can misread letters and numbers. AML AMENDMENT DATE 07/06/77 06/28/88 LL/90/L0 06/28/88 07/06/77 06/28/88 07/06/77 06/28/88 1977 April 19 AFM SUPPLEMENT NUMBER/DATE Issue Date: FAA APPROVED MODEL LIST (AML) NO. SA418HW FLOAT SPREADER ASSEMBLY INSTALLATION FAA SEALED DRAWING/ DRAWING LIST REVISION NO. AND DATE 06/27/77 İNC 02/01/88 06/27/77 02/01/88 06/27/77 02/01/88 INC 06/27/77 02/01/88 INC JOBMASTER COMPANY, INC. NUMBER J B77 or J B77A J B77 or J B77A J B77 or JB77A JB77 or JB77A FOR Equivalent to CAR 10, Equivalent to Page 1 of 2 CERTIFICATION BASIS FOR ALTERATION CAR 3, 5-15-56 |CAR 3, 11-13-45 CAR 3, 11-1-49 CAR 10, **61-5870 CAR 4a ORIGINAL TYPE CERTIFICATE NUMBER 7A12 A-806 Models 58-4580, 679-4930, *59-5250, A717 1A10 AIRCRAFT MODEL 60-F5, AL C5 Reference: ISTC SA1864WE 'DeHavilland DHC-2 Mk I *Reference: STC SA305NW **Reference:STC SA416NW DGA15P PA 23-250 'Model 679-4930 'Reference: ISTC SA1444WE AIRCRAFT MAKE Aeronautica 'Macchi 'Float: Edo| Model 58- 4580 Float: Edo! Howard Float: Edo Model 58- 4580 Piper Float: Edo ITEM AMI AMENDMENT DATE 07/06/77 06/28/88 07/06/77 06/28/88 1977 April 19, AFM SUPPLEMENT NUMBER/DATE 2. Deluja Certification Office Issue Date: JOBMASTER COMPANY, INC. FAA APPROVED MODEL LIST (AML) NO. SA418NW FLOAT SPREADER ASSEMBLY INSTALLATION FAA SEALED DRAWING/ DRAWING LIST REVISION NO. AND DATE NUMBER 06/27/77 J B77 or INC 02/01/88 JB77A A 06/27/77 J B77 or INC 02/01/88 J B77A FAA Approved: Date: June 28, 1988 FOR CAR 10, Equivalent to Page 2 of 2 CERTIFICATION BASIS FOR ALTERATION |CAR 3, 5-15-56 ITC 679 ORIGINAL TYPE CERTIFICATE NUMBER 7A15 AIRCRAFT MODEL PC-6-H2 Float: Edo/PC-6/350-H2 PC-6/A-H2 PC-5/B-H2 SR-10D, E, AIRCRAFT MAKE Pilatus |Model 58- 14580 Float: Edo Models 58- 4580, 679- 4930 Stinson Float: Edo|F, K Model 59- 5250 ITEM ## Every issue (1) - June 28, 1988: Amended, Current. [certificate](https://openairdocs.org/files/sha256/b6/69/b669cea155929f774b1589a6015f7090c92ce4f29fb7715dfc0973dc21879ba7), [AML_SA418NW.pdf](https://openairdocs.org/files/sha256/74/a2/74a2d0a60ad9cd894f7408382b4d545da101ad32a09ab08a56aac25f3493f5a8) --- 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.