NEW DELHI, May 28 -- US firm Honeywell has overcome supply chain bottlenecks and delivered the first batch of engines for the overdue indigenous basic trainer aircraft-critical for the Indian Air Force-to Bengaluru-based Hindustan Aeronautics Limited (HAL), officials aware of the matter said on Wednesday.

Honeywell has delivered three TPE331-12B turboprop engines for the HTT-40 (Hindustan Turbo Trainer-40) aircraft being built at HAL, and assured the state-run firm of timely supplies, the officials said, asking not to be named.

"HAL aims to fast-track aircraft deliveries as engine supplies stabilise," one of the officials said. The platform will serve as a stepping stone for pilots to develop critical flying skills.

The air force order...