* Polish PMI flat at 48.2, output falls slightly to 50.5
* Czech PMI creeps higher to 49.5 vs 47.1 in August
* Hungarian PMI, different methodology, 49.0 vs 46 in Aug * Analysts say risk of repeated slowdown remain
By Michael Winfrey
PRAGUE, Oct 1 (Reuters) - Manufacturing held ground or moved closer to recovery in September in the European Union's biggest ex-communist economies, data showed on Thursday, but analysts warned of a possible double dip slowdown on the horizon.
Industry-heavy eastern Europe is clawing back from recession in all but its largest member Poland, which looks set to be the only EU state to avoid economic contraction this year but showed stagnation in manufacturing this month.
The Czech PMI edged closer to the 50 break-even point that marks the barrier between expansion and contraction, rising to 49.5 from 47.1 in August, Markit Economics said.
Production and new orders cleared that hurdle for a second month in a row, and the new export orders index edged above 50 for the first time in 15 months.
Poland's PMI was flat at 48.2, ending a run of seven monthly increases this year. Seasonally adjusted output fell slightly but was still above 50 at 50.5.
Hungary's PMI, compiled under different methodology than the Markit data, rose to 49.0 in September from 46.0.
Analysts said the data was positive and showed a continued climb toward recovery.
But they said the structure of production faced risks ahead, not least after a long draw-down of inventories and the approaching end to car-scrap subsidy schemes in the euro zone that pushed up orders for eastern-made cars.
"At least part of the industrial rebound has been due to the slowdown in the pace of inventory rundowns, and then also you've got the car schemes too," said Capital Economics analyst Neil Shearing.
"That just brings demand forward and raises the risk of a double-dip recession next year. On the face of it, (the PMI data is) good news, but there are still plenty of reasons to be cautious."
DOUBLE DIP?
Clear signs of improvement appeared in other data on Thursday with a much-lower-than expected drop in Czech industrial output, which fell just 8.1 percent year-on-year in August, decelerating from a 18.2 percent fall in July.
It was the first single-digit fall after nine months of double-digit drops. Analysts had forecast a 12.5 percent fall.
But risks remain. The Czech central bank has said it expects a "W"-shaped recession, with positive growth increasing and then dipping back towards zero in the middle of next year.
And on Thursday Czech carmaker Skoda <VWOG.DE> said it was considering halting production for two days this month.
Skoda, the largest Czech company by sales, said the idea was tied to a fall in demand following the end of a German scheme in which consumers received government funds to buy new cars.
"Overall we expect that the entire processing industry, due to an end of the scrap subsidy, (will) cool and recovery in the dynamics will slow down," said Jaromir Sindel of Citibank.
Poland, with its region-leading 38-million domestic consumer market, is also expected to show weaker growth through around 2011 and worries persist over next year's sharply higher budget deficit target and over public debt, which may breach a second safety level of 55 percent of gross domestic product.
But Poland is still less dependent on industry and exports than the Hungarians and Czechs, whose economies are 70-80 percent driven by sales abroad, and analysts said its recovery picture, while still not completely clear, was positive.
"A protracted decline in employment suggests consumption may falter in the months ahead and that 3Q GDP is softer than 2Q," Juliet Sampson, chief economist for emerging Europe at HSBC.
"However, Poland appears to have avoided recession ... and while the recovery may slow, it is unlikely to stop." (Reporting by Reuters Polish, Hungarian and Czech bureaus; Editing by Victoria Main)