Gensol Engineering, promoted by BluSmart founders, defaulted on around Rs 4 crore payment to pass-through certificates holders this month.Funds raised by issuing PTCs were backed by vehicles on BluSmart platform; repayments were tied to revenue from these vehicles.Due to BluSmart cab service cessation and uncertainty in deal talks, loan repayment has become uncertain, with Rs 4.04 crore outstanding.Investors attracted by high returns and brand value of BluSmart now face potential defaults, with over Rs 80 crore of NCDs due for repayment.