JOINT BASE LEWIS-MCCHORD, Wash. (AP) -- An investigation into December's collision of two helicopters from Joint Base Lewis-McChord cites pilot and air traffic control errors and "dark spots" in aviation communication.
The initial investigation by Lewis-McChord's 16th Combat Aviation Brigade says one pilot of a Kiowa helicopter should have seen and avoided the other. Four soldiers were killed in the crash in rural Thurston County.
The News Tribune reports (http://is.gd/aemj8o ) the crash is still under investigation by the Army Combat Readiness and Safety Center at Fort Rucker, Ala.
Lewis-McChord has 143 copters in its active-duty fleet.
Information from: The News Tribune, http://www.thenewstribune.com