By America Hernandez

PARIS, Feb 22 - France's Engie stated on Thursday it scheduled a 714 million euro ($ 774 million) disability charge in 2015 as an outcome of problems with onshore wind turbines in the United States and a fall in some U.S. long-term energy rates.

Engie said in its yearly results that the functional problem concerned wind turbines produced by Germany's Nordex, while the cost drop remained in the U.S. Southwest Power Swimming Pool (SPP),. which ranges from Montana in the north to New Mexico in the south.

It's a very local concern, it's company-related, the bulk of. it is one market and one portfolio of possessions ... The task. started a few years back, we needed to fix it and now it's effectively. done, Engie CFO Pierre-François Riolacci told analysts.

We have one wind farm on which the Nordex turbines do not. work, so we have a rate of accessibility of about 30%, which is. really low compared to what we should have, so it renders the. operation uneconomic ... We have assessed the loss of worth. connected to this asset, provided it is not at a typical level of. working, Riolacci added on a separate media call.

Nordex did not instantly respond to a Reuters request for. comment on Riolacci's remarks.

Engie was not the only energy company suffering from cost. presumptions that did not materialise in the SPP market, he said.

The fall in long-term power rates had a favorable overall. impact on the fair value of associated virtual Power Purchase. Arrangement (PPA) agreements amounting to about 300 million euros,. Engie's outcomes declaration showed.

We have actually reorganized all our PPAs in this portfolio, so we. are now in control of operations, and so we decided to take this. hit, Riolacci stated.

Shares in Engie were up 2.7% at 1111 GMT.