Presumably what was damaged was a new russian air defense system.
The following has been said about this:
Mid-East sources: Israel’s air strikes hit Russian top-line air defense missiles sent to Syria & Hizballah
DEBKAfile Special Report December 7, 2014, 10:18 PM (IDT)
Israeli air strike
Israel’s air strikes near Damascus international air port and the Syrian-Lebanese border Sunday, Dec. 7, are depicted by Middle East military and intelligence sources as Israel’s first overt military clash with Russia in the course of the more than three-year Syrian war. Those sources assert that the strikes demolished components of Russian SA-25 or other types of top-line anti air missile systems that Moscow had destined for Syria and the Lebanese Hizballah terrorist group.
Russian transport planes are said to have shipped these consignments in the last few days to the military section of Damascus international airport. It was pointed out that the Israeli air strikes occurred less than 24 hours after Deputy Russian Foreign Minister Mikhail Bogdanov, the Kremlin’s point man for the Syrian war, met with Hizballah leader Hassan Nasrallah Saturday in Beirut. The Russians for the first time insisted on widely circulating photos of the two officials shaking hands.
Israeli military and intelligence sources have not confirmed this account. However, debkafile’s sources have learned that Moscow has been looking for a reckoning with the US and Israel over the fall in the last week of October of the large Russian intelligence post at Tel a-Hara in southern Syria to Syrian rebel units.. One of the most highly sophisticated Russian intelligence bases outside its borders, the secret site was located strategically close to the junction of Syria’s borders with Jordan and Israel.
The prized hi-tech apparatus, much of it unfamiliar to Western spy agencies, was quickly shipped out of Syria for examination in the West.
Other Israeli air force targets struck near Damascus airport in Sunday’s raid were the 103rd brigade of the 4th Division, which is the Syrian president’s republican guard, and the same division’s logistic rear base at Dimas near the Lebanese border.
The fact that Israel conducted air strikes against two facilities of the same Syrian army division along the route to Lebanon indicates that the targeted weapons were on their way from Syria to Hizballah strongholds in Lebanon.
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