The problem with tracking down this specific incident is that the details you're describing - 17,000 feet drop, audio of crew asking for help - could match a few different events depending on whether we're talking about commercial or private aviation, and the year matters a lot. Without the airline, approximate date, or flight number nailed down, you're basically hunting blind. If you're trying to verify this actually happened, check accident databases like the Aviation Safety Network instead of relying on forum posts or YouTube videos, since those often mash together details from multiple incidents or get the numbers wrong.
One thing people usually skip when researching these: look for NTSB reports or official investigation documents if it happened in US airspace, or the equivalent from other countries' aviation authorities. Those reports have the actual transcript data, flight recorder information, and root cause analysis - way more solid than any secondhand retelling. They're public and searchable, so if the incident is real and notable enough, there's almost always an official record you can pull instead of guessing which accident you're actually looking for.