Maintenance Test Army Chief Warrant Officer 4 Eric Ridilla, a maintenance test pilot with Company B, 628th Aviation Support Battalion, Pennsylvania National Guard, performs final checks on a CH-47 Chinook helicopter at Fort Indiantown Gap, Pa., before a flight mission to Puerto Rico in support of Hurricane Maria relief efforts, Sept. 26, 2017. Army National Guard photo by Spc. Anna Churco SHARE IMAGE: Download Image: Full Size (0.42 MB) Photo By: Army National Guard photo by Spc. Anna Churco VIRIN: 170926-Z-XN160-040.JPG Photo Gallery