Hi,
No you are not eligible for Aviation after B.com.if you are completed HSC with science stream then eligible.
Below am indicating the aviation related information it is usefull for you.

AVIATION:
Aviation relates to all aspects of an aircraft and courses in India deal with

Flying operation,

Aircrew,

Aircraft,

Air Traffic management,

Technical aspects of Flight,

Aviation Safety,

Regulatory policies and economics of airport.

Eligibility Criteria:

HSC certificate

Height requirement:
for boys-5ft.7inches
for girls-5ft.2inches

Weight in proporton to height.

Minimum level of English fluency.
Best of luck