Credits to OwnerzZ
https://www.simpleplanes.com/a/722qyA/Robinson-R44-Raven-II
@Hedero

AG:1 - Nothing

AG:2 - Nav Lights

AG:3 - Light

https://en.wikipedia.org/wiki/Robinson_R44

Designed during the 1980s by Frank Robinson and his staff of engineers, the R44 first flew on 31 March 1990. The R44 Astro was awarded an FAA Type Certificate in December 1992, with the first deliveries taking place in January 1993. The first R44 Newscopter featuring onboard electronic news gathering equipment was delivered in 1998.[3] In January 2000, Robinson introduced the Raven with hydraulically assisted controls[4] and adjustable pedals. In July 2002, Robinson introduced the Raven II featuring a more powerful, fuel-injected engine and wider blades, allowing a higher gross weight and improved altitude performance.

During November 2015 Robinson announced the Cadet, a Raven I with a cargo area instead of the two back seats, a slightly less powerful engine and a more efficient muffler.[5]

Robinson has carried out ground run testing with an aircraft diesel engine that could replace its Lycoming IO-540 avgas engine. The diesel could provide better altitude performance, a fuel burn reduced from 16 to 12 US gal (61 to 45 L) per hour and better fuel availability.[6]