On December 21, 2018, an incident occurred within the Delhi Airspace in India involving a Boeing 747-428, registration N919CA, operated by National Airlines.
Following notification from the Aircraft Accident Investigation Bureau (AAIB) of India, the NTSB appointed a U.S. Accredited Representative to support the investigation conducted by the Indian authorities, acting as the State of Manufacturer and Design under ICAO Annex 13.