Boeing acquired much of the legacy training IP. Through (maintenance portal), subscribers can access official Boeing CBTs, which are very similar to the Lufthansa version. A subscription requires an employer airline contract.
Even as newer MAX and NG variants dominate the skies, the Classic remains a vital platform for cargo operators, charter airlines, and training academies in developing nations. For maintenance engineers, pilots, and aviation students, the gold standard of systems knowledge has often been the Lufthansa Technical Training (LHT) CBT —an interactive, computer-based training module. Boeing 737-300 500 CBT - Lufthansa Free Download