Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: In his description of the wreckage   NTSB investigator Stephen Stein  explained there was "evidence of a post-crash fire" in the Quartermaster section of the Grand Canyon where the helicopter went down.
 Stein  said that three NTSB investigators have been dispatched to the crash site since Sunday and plan to go through the aircraft's inspection records  the pilot's certificate and status of the engine.
 He  also said that everything from survivor and witness interviews to weather will be examined and included in a preliminary report in the coming days. A final report would be released after 18 months.
"We have reports of some wind "  Stein  said  but  he  cautioned that the reports of gusts would need to be corroborated with radar data calibrated at the time of the crash.
Output:
Investigators looking 'very closely' to see if fatal Grand Canyon chopper was equipped with 'crash