2015-20-51: Model UH-12-series helicopters
Emergency order 2015-20-51 is an airworthiness directive. It names Hiller UH-12: about 217 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: other and general.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Hiller Aviation; Siam Hiller Holdings, Inc.
- Models
- UH-12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12L, UH-12L4, UH-12E, UH-12E-L
- On this site
- Hiller UH-12 217 registered
Dates and paperwork
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/2015-20-51.json · aircraft systems.