PARIS (Reuters) - Airbus Group (>> AIRBUS GROUP) on Tuesday sketched out the opening steps of a progressive plan to unwind its 46 percent stake in Dassault Aviation (>> DASSAULT AVIATION), saying it was weighing the possibility of selling a 10 percent stake by placing it with financial institutions.

The European planemaker's chief spokesman said such a move, if it went ahead, would be combined with a further reduction of the company's shareholding by taking part in a share buyback being prepared separately by Dassault Aviation.

Shareholders in family-controlled Dassault Aviation, which makes Rafale fighter planes and Falcon business jets, last month authorized a buyback of up to 10 percent of the French company's thinly traded stock.

"That provides an obvious route for a partial exit," Airbus Group's head of corporate communications, Rainer Ohler, said.

"We believe, however, that longer-term value objectives might be better served through combining a sale to Dassault with the placing of a meaningful amount of shares in the market – enough for there to be much improved liquidity - and so we continue to review our options in this respect," Ohler said.

"A first placing of around 10 percent, combined with a (Dassault) buyback, would allow us to reach this objective. If we take this route, we could hope to capture subsequent value upsides through further secondary placings," Ohler added, commenting on the company's options by email.

Dassault Aviation is controlled by family holding company Groupe Industriel Marcel Dassault, which owns 50.55 percent of the company. Airbus Group owns 46.32 percent and 3.13 percent is held by public investors.

In July, Airbus stepped up the pace in its efforts to end a longstanding arrangement to warehouse the Dassault stake on behalf of the French government, saying a sale of the shares was not a question of 'if' but 'when'.

It inherited the stake from former state-owned Aerospatiale along with a Paris headquarters building, whose recent sale boosted Airbus Group's half-year earnings.

Activist hedge fund TCI last year called the stake in Dassault "a poor use of capital" and urged Airbus to sell it.

Dassault has a market value of just under 10 billion euros.

Ohler said Airbus Group had received "numerous expressions of interest from investors" for its shares.

Analysts say the Dassault family wants to expand its market float and bring in new investors, while keeping control.

Dassault Aviation shares have risen 3.6 percent this year, compared with a 10.5 percent decline in Airbus Group stock.

(Reporting by Tim Hepher; Editing by Dominic Evans, Larry King)

Stocks treated in this article : AIRBUS GROUP, DASSAULT AVIATION