The largest domestic carrier's admission that problems persist with Pratt & Whitney engines fitted in the new planes assumes significance as IndiGo is betting on neos to steer its ambitious expansion plans amid intense competition.
The airline's net profit declined even as total income from operations jumped to Rs 4,986.49 crore in the third quarter of the current financial year.
In the latest December quarter, IndiGo's overall expenses shot up to Rs 4,480.43 crore from Rs 3,415.66 crore in the same period a year ago, according to a regulatory filing.
This was mainly driven by over 40 per cent rise in aircraft fuel costs, which stood at Rs 1,671.20 crore in the third quarter. The same stood at Rs 1,165.86 crore in the year ago period.
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According to the airline, demonetisation resulted in a sharp decline in yields in November and December last year.
A320 neo is giving better fuel efficiency at 15 per cent, Ghosh said despite continuing to "face operational issues with neo engine".
"We have experienced higher than expected engine replacements... The airline has already extensively discussed these issues with the engine maker Pratt & Whitney last week," the IndiGo chief said.
In the meantime, IndiGo continues to receive necessary operational and technical support including the provision for spare engines, he added.
Currently, the airline has 14 A320 neos in its 126-strong fleet and the number is expected to reach 133 by fiscal end.
"We expect to launch operations in the next 90 days to
Madurai, Amritsar, Mangalore in India apart from Dhaka, Doha and Sharjah on international routes," Ghosh said while talking about expansion plans.
About overall industry trends, a senior IndiGo official said matching low fares offered by rivals is important depending on the fare bucket concerned.
At the end of December 2016, IndiGo's total debt stood at Rs 2,746.6 crore and the entire amount is "aircraft related", as per the filing.
The carrier's total cash balance was Rs 8,455 crore, including free cash to the tune of Rs 3,786.5 crore.