Engine and system sounds

Service Update 1 reworked engine, pack, GPU, APU and other sounds. One user reported that the engines were unusually quiet; another said they had the same issue. On 5 November, FSS staff said they would discuss it internally, then said a potential fix should be in the next update. The original poster asked on 8 November when that update would arrive. No release containing the fix had been announced by then. Separately, a 7 November report said the flight-deck air-conditioning sound was unusually loud and did not seem to respond to the expected simulator volume control; no staff reply or cause was visible. These reports do not establish a fault in every aircraft. Check the aircraft version and simulator sound mix, then compare the same sound in cockpit and external views. FSS Service Update 1 ^[2] · Engine sound discussion, 4–8 November 2026 ^[195] · Air-conditioning sound report, 7 November 2026 ^[196].