India, July 29 -- Once hailed as the future of air travel, the world's largest passenger aircraft is now proving to be a costly engineering marvel not prepared to age or go down quietly.

Airbus A380 was once grounded and nearly phased out. It found a new lease on life after the pandemic. However, Bloomberg has reported that regulatory bulletins ordering repairs, inspections or replacement parts for the massive four-engine plane are piling up. While some are procedural, such as a demand for timely equipment checks, others are more serious.

Leaking escape slides, cracked seals and a ruptured landing-gear axle feature among 95 airworthiness directives for the A380 listed by the European Union Aviation Safety Agency since January 2020.

Air...