Sir: Incidents of plane crashes have become a routine now, which is very disturbing news. In order to check these accidents, the concerned authorities need to take serious steps. They must look into the technology being used, especially in those flights that crashed in the recent past. Only a complete monitoring of all the processes and systems will help ensure safe travelling by air. The airline companies across the world must come forward and look into this particular aspect in the larger interests of the air passengers. SENTHIL SARAVANA DURAI Mumbai India