BONN, FEB. 11 -- For the last three days, German television has shown unchanging footage of a chartered Soviet cargo plane parked beside a runway at the Cologne military airport.

The plane was supposed to deliver German antiaircraft missiles to NATO ally Turkey as part of Chancellor Helmut Kohl's campaign to prove that, despite a slow start, Germany is a dependable ally of the anti-Iraq coalition. But the pilot -- on instructions from Moscow -- has refused to take off with the shipment, and the cargo plane, like Germany's Persian Gulf policy, remains firmly in park.

Two weeks ago, the Kohl government broke its initial silence on the gulf war with a series of moves designed to ease suspicions in Washington, London and other Western capitals over Bonn's reluctance to play an active role in the battle against Iraq. Kohl and Foreign Minister Hans-Dietrich Genscher announced more than $11 billion in aid to the U.S.-led coalition, weapons for Turkey and Israel and all manner of assurances that Germany fully supports the alliance.

But nothing the Germans do seems to ease doubts about Bonn's role in the conflict. Today, a beaming Kohl stood here beside British Prime Minister John Major as Major thanked Germany for $550 million in financial support and added that "there is no difference in our assessment and objectives in the gulf conflict." But the British remain angry over what they say has been Germany's refusal to give British forces other needed support.

British diplomats even blame Germany for the loss of British aircraft over Iraq, saying that Germany-based British pilots would have been better prepared for their missions if Bonn had permitted training flights at low altitude -- a noisy practice that the Germans have banned in recent months.

Germany also announced today that it will give Israel $3.3 million to help rebuild neighborhoods hit by Iraqi Scud missiles. But the gesture, part of a $660 million package of humanitarian and military aid for the Jewish state, has done little to stem Israeli resentment of the fact that German technology allowed Iraq to extend the range of the Scuds so they could reach Israel. In Germany, Jewish groups have joined with Israeli politicians in the most severe criticism of a German government in decades -- a sharp break from the cordial relations that Bonn has labored to build as a symbol of its break with the Nazi past.

Revelations that German companies helped Iraq put together its arsenal of chemical weapons -- some of them direct descendants of the Zyklon B gas used to murder millions of Jews during the Holocaust -- have led many Israelis to argue that their country should not accept Germany's new offers of aid. Television images of German neo-Nazis volunteering to fight for Iraq have opened the old wounds further.

Rita Suessmuth, president of the German Parliament, said after visiting Israel last week that she found "deep skepticism and shaken trust" toward Germany. "You can imagine how the link between air-raid alarms, poison-gas masks and neo-Nazis raised the question among Israelis about whether there is any sense at all to maintaining contacts with Germans," she said in a radio interview.

New charges of German corporate aid to Iraq emerged today as prosecutors confirmed they are investigating officials at Strabag Bau AG, a Cologne-based construction company that the news magazine Der Spiegel says broke the U.N. embargo against Iraq about 70 times. The magazine reported that the company delivered about $350,000 worth of spare parts, tools, water-treatment chemicals and 500 gas masks to Iraq via Jordan. Strabag got around German export controls by saying it was working on a mixing station for the Iraqi petrochemical industry, Der Spiegel reported. The magazine said prosecutors searching Strabag files found an instruction manual for the use of fuel in Iraqi Scud missiles.

Strabag spokesman Anton Guenter Cromme said the company sent supplies to the site of an airport it was building in Basra, Iraq, between August and December -- after the Iraqi invasion of Kuwait -- but that it had agreed to continue the construction only to prevent its 500 employees there from being taken as human shields. The Bonn Economics Ministry is looking into allegations that as many as 110 German companies violated the embargo against Iraq, and nine firms are under criminal investigation.

As part of the drive to steer attention away from the role of German companies, Genscher this week is traveling to Egypt, Syria and Jordan on what aides describe as a "peace-seeking mission." But the foreign minister's decision to include Jordan on his itinerary after King Hussein's strongly anti-U.S. speech last week has raised new criticism of the German position. By going to Amman, said Germany's largest newspaper, Bild, Genscher is making a "gesture of solidarity to a country which daily preaches hatred against Israel and the annihilation of the Jews. Mr. Genscher, this trip is superfluous and detrimental to Germany's position in the West."

Genscher today defended Bonn's gulf policy, saying that the same foreign critics who now scold Germany for not committing troops to the gulf war expressed the opposite fear a year ago, worrying that a reunited Germany might regain the military might that plunged the world into two wars this century.

Meanwhile, the Soviet plane sits in Cologne, its cargo going nowhere. Defense Minister Gerhard Stoltenberg has now asked the United States to fly the Roland antiaircraft missiles to Turkey. "We know {Washington's} capacity is very strained in the gulf," Stoltenberg said, "but I believe we will be able to get the equipment to Turkey with some delay, with American help."