According to Article 6 of the Act, after a major aviation occurrence or an alleged major aviation occurrence arises, the owner of the aircraft, the operator of the aircraft and the air traffic control authority (organization) agency shall, within the time limit specified in Article 9 of the Act, promptly notify TTSB duty officer by telephone on present situations of the occurrence and fill out a Major Aviation Occurrence Notification Form transmitting to the TTSB by fax or email.

The owner of the aircraft, the operator of the aircraft and the air traffic control authority (organization) shall notify the TTSB of the following occurrence or alleged occurrence:
1. Death or injury of any person;
2. The aircraft is missing or is completely inaccessibility;
3. Substantial damage to aircraft or existence of sufficient ground to believe that the aircraft is subjected to substantial damage;
4. An aircraft is in close proximity to another aircraft within five hundred feet in the air and requiring an avoidance maneuver to avoid a collision or an unsafe situation;
5. The aircraft collision event may cause substantial damage to the aircraft;
6. During controllable flights, those who deviate from the course or fail to comply with the air traffic control instructions must take emergency avoidance maneuver to avoid collision with terrain or ground barriers;
7. Aborted take-offs on a closed or engaged runway, on a taxiway or unassigned runway;
8. Take-offs from a closed or engaged runway, from a taxiway or unassigned runway;
9. Landings or attempted landings on a closed or engaged runway, on a taxiway or unassigned runway (height lower than three hundred feet above the ground, or instructed by the air traffic controller to make a correction);
10. Gross failures to achieve predicted performance during take-off or initial climb;
11. Fire and/or smoke in the cockpit, passenger compartment or cargo compartment, or engine fire.
12. The flight crew must use oxygen in an emergency situation pursuant to the operation manual;
13. Aircraft structural failures or engine disintegrations, including uncontained turbine engine failures, not classified as an accident;
14. Multiple malfunctions of one or more aircraft systems seriously affecting the operation of the aircraft;
15. Flight crew incapacitation in flight;
16. Fuel quantity level or distribution situations requiring the declaration of an emergency by the pilot, such as insufficient fuel, fuel exhaustion or inability to use all usable fuel on board;
17. Runway incursion occurred due to the aircraft is close to an obstacle or other aircraft in take-off or landing phase;
18. Take-off or landing incidents, such as under-shooting, overrunning or running off the side of runways;
19. System failures, weather phenomena, operations outside the approved flight envelope or other occurrences which caused or could have caused difficulties controlling the aircraft;
20. Failures of more than one system in a redundancy system mandatory for flight guidance and navigation;
21. The unintentional or, as an emergency measure, the intentional release of a slung load or any other load carried external to the aircraft; or
22.Any other situation that may cause death, injury or conform to the content of paragraph 17 of Article 2 of the Civil Aviation Law.