SA418NW
Installation of a float spreader assembly. Held by Jobmaster Company INC, which holds 16 approved modifications in all. Last revised June 28, 1988. System: airframe structure.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aeronautica Macchi S.p.A.; Aeronautica Macchi S.p.A.; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Howard Aircraft Foundation; Pilatus Aircraft Limited; Pilatus Aircraft Limited; Pilatus Aircraft Limited; Pilatus Aircraft Limited; Piper Aircraft Inc.; Viking Air Limited
- Models
- AL 60-C5, AL 60-F5, SR-10D, SR-10E (Army UC-81H), SR-10K, DGA-15P (Army UC-70; Navy GH-1; -2; -3; NH-1), PC-6-H2, PC-6/350-H2, PC-6/A-H2, PC-6/B-H2, PA-23-250, DHC-2 Mk.I
- Type certificates
- 7A12, 7A12, TC 679, TC 679, TC 679, A-717, 7A15, 7A15, 7A15, 7A15, 1A10, A-806
- On this site
- Howard Aircraft DGA-15 97 registered
Pilatus PC-6 22 registered
Piper PA-23 Apache and Aztec 1,316 registered
Stinson SR-10 17 registered - The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 5, 2026.