Whitehaven Coal Limited (ASX:WHC) has cut its full year production guidance.
The coal miner now expects output to drop to between 9.8 million and 10 million tonnes, down from an earlier forecast of 10.7 million tonnes.
The downgrade has been blamed on an operational issue at its Narrabri mine in New South Wales.
CEO Paul Flynn says he is confident the recovery plan currently being executed will deliver a return to production in the indicated timeframe.
The company has also faced geotechnical challenges at its Rocglen mine.
Whitehaven Coal reported a net loss of $11.6 million in the first half of the 2014 financial year