Dehradun, Jan. 10 -- The pilot of the helicopter that crashed near Kedarnath on June 15, killing all seven people on board, radioed "cannot see anything, turning ." moments before the aircraft disappeared into clouds at the valley exit point, according to an interim report released by the Aircraft Accident Investigation Bureau (AAIB). The transmission, overheard by another pilot in the vicinity, was the last communication from the Bell 407 helicopter operated by Aryan Aviation before it crashed at 5.35am near Gaurikund in Rudraprayag district. No distress call was received after that radio message. The AAIB interim report, seen by HT, revealed that the pilot of helicopter VT-BKA had radioed other pilots that he could see clouds near the Kedarnath valley exit point before making the final transmission. CCTV footage analysed by investigators confirmed the valley exit point was covered with clouds that were moving down into the valley at the time of the accident. The helicopter crashed into a mountain on the right side of its flight path while maintaining the prescribed altitude of 9,000 feet. The aircraft caught fire on impact and was destroyed, with wreckage scattered across the accident site at an elevation of 9,051 feet, approximately 5.65 nautical miles from the Kedarnath helipad. The crash underscores the treacherous conditions helicopter pilots face while operating on the Char Dham pilgrimage route, where terrain-induced blind spots and rapidly changing weather create hazardous flying conditions. The Kedarnath valley has no dedicated weather stations or air traffic control systems, with pilots relying on CCTV footage and automated weather instruments that do not provide cloud information. The helicopter took off from Guptkashi at around 5.10am - timed with sunrise - and landed uneventfully at Kedarnath at about 5.20am. After disembarking passengers, it took off from the Kedarnath helipad with six passengers who had boarded there. CCTV footage showed no abnormality during take-off or while the helicopter entered the valley. As per standard operating procedures, helicopters must maintain an altitude of 8,500 feet while entering the Kedarnath valley and 9,000 feet while exiting. The pilot of VT-BKA was maintaining the prescribed 9,000 feet altitude while approaching the valley exit point when he encountered the cloud cover. The operator's operations team interviewed the pilot of VT-TBC, which was third in the flying sequence that morning. The pilot said that when VT-BKA was near the valley exit point, its pilot made a radio transmission saying he could see clouds at the exit point, followed by the final message: "cannot see anything, turning ."...