The names and contact detail of some good Aeronautical institutes or colleges in Madras or Chennai as your cousin wants to take admission in it are as follows:

Anna University - Chennai
Sardar Patel Road, Guindy
Chennai, Tamil Nadu

Tagore Engineering College
Rathinamangalam, Vandalur
Chennai, Tamil Nadu

Apollo Engineering College
Chettipedu, Poonamallee,
Chennai, Tamil Nadu

Dhanalakshmi Srinivasan College of Engineering and Technology
East Coast Road, Mamallapuram
Chennai, Tamil Nadu

Sathyabama University
Jeppiaar Nagar, Rajiv Gandhi Road
Chennai, Tamil Nadu

Gojan School of Business and Technology
80 Feet Road, Edapalayam, Alamathi, Redhills, Thiruvallore Road
Chennai, Tamil Nadu

P.M.R. Institute of Technology
Adayalampattu
Chennai, Tamil Nadu

Hindustan University
P.O. Box No. 1, Rajiv Gandhi Salai (OMR), Padur, (Via) Kelambakkam
Chennai, Tamil Nadu

Jaya Engineering College
C.T.H.Road, Prakash Nagar Tiruninravur
Chennai, Tamil Nadu

Jeppiaar Engineering College
Semmenchery Village, Old Mamallapuram Road
Chennai, Tamil Nadu

St. Peter's University
Avadi
Chennai, Tamil Nadu