IndiGo challenges Rs 900 Cr customs duty on re-imported aircraft parts in Delhi HC.

• IndiGo seeks over Rs 900 crore customs duty refund from the Delhi High Court.
• The refund is for duty paid on aircraft parts re-imported after overseas repairs.
• IndiGo argues re-import after repairs is a service, not goods, leading to double taxation.
• A Delhi High Court judge recused from the case due to a conflict of interest.
• IndiGo paid the duty "under protest" to prevent aircraft grounding, citing a prior favorable ruling.

Why It Matters: This case impacts all Indian airlines' recurring costs for aircraft repairs.