SA584WE
Installation of oil filter assemblies. Held by Nelson Filter, which holds 3 approved modifications in all. Last revised August 29, 1974. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Rogerson Hiller Corporation; Rogerson Hiller Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation
- Models
- 47J-2A, 47J, 47K, 47J-2, 47G-3B, 47G-4A, 47G-4, 47G-5, 47G-3 (OH-13H), 47G-2A-1, 47G-2A, 47G-3B-1 (TH-13T), 47G-2 (USAF H-13H), 65 (L-23F), 65-80, 65-A80-8800, 65-B80, J50, H50, G50, E50, D50E-5990, B50 (RL-23D), D50E, D50C, C50, D50B, D50A, D50 (L-23E), F50, 50 (L-23A), B50 (L-23B), B50 (L-23D), UH-12E-L, UH-12E, 680-E, 560F, 680-F, 560-E, 560-A
- Type certificates
- 2H1, 2H1, 2H1, 2H1, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, H-1, 3A20, 3A20, 3A20, 3A20, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 4H11, 4H11, 2A4, 2A4, 2A4, 6A1, 6A1
- On this site
- Beechcraft 65 201 registered
Bell 47 477 registered
Hiller UH-12 217 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 7, 2026.