Oakland Airport Closed to Private Planes; Trucks Block Entrancetht Oakland Airport was cllt;»edl l« all but tommercf*] and military Plight* today on orders o( the Civilian Aeronautics Authority, grounding all private airplanes in theUnited State* and it* possesaionr.The airport entrance was blocked by a row of 12 city trucks, and the ReW and hangars were' guarded by city police, airport police and Army tod Navy guards,Officials of the airport were notified that additional Army personnel will arrive today at the Held, and some officials thought it Hkeljr that the Army woujd “take w*r completely.’*UCSNSCft SVSrtNDISHa C.A.A. order suspended temporarily all pilot license* except thole bald by pilots oo regular airDaly parsons with legitimate busi-[ MMI at‘ fiw airport, or those who{ tead btokad passage on th* com-i tesrdal air lines, were allowed to; PdW through the row of trucks-which btqck the aiipoil uiiruoce. iAir lines passengers found il j nactfWry to purchase tickets ini advance at downtown offices, or to] telephone in advance to the airport,; ttt gat past the guards at the gate.;Aa entrance wide enough for only'one automobile to pass was left In the row of truck?, and every automobile entering the airport eras stopped .and .searched.ttlUCtOCASH DODBLCDThe Airport police doubled its guar# W six men during the riight,! and fca« Oakland police radio cars patrojbd road* in the vicinity of the Held. Th* United Air Lines placed; four men on guard at it* building! at the airport end friends and rela-! tiaas Mdding air pa?»engcrj goodbye |war* iwt allbwad to enter the1buJkftac. 1Th* CAA. order grounding all privalt° plane* was received at *l1 pm. at th* airport and was posted . Immediately in the administration!Wilding.The airport already had taken* **her precautions earlier, however, by placing the special guard at 151 ataon yetlerdsy.n* Associated Pre«s repnrtc-d frw Washington. I,C.. that Robert Hinckley, chairman of th** C A K. Air Safety Board, sent tele^ramc to the Governors of the 48 SI sir* Alaska and ihe Canal Zone asking than t# assign pohce immed;aicly *• all known landing field*- to pro-feet fociUl Set and to hf;j ,‘uHr.i!’ an the fields unless they %verc engaged In scheduled ;ir Vanporta-were publicly owned or ’.vt JJWWI under contract with the rHMial Government.AWAIT IftCIFIC OIDERSTltft aetioai was to remain effrc-thrt, Hinckley said, until aecretmericommanding officers of Army or Navy air fields issued instructions permitting specific planes to fly.It was to remain effective also. Hinckley said, until the office of civilian defense issued further instructions for the formation of a civil air patrol.The order susrwndJn* pilot*' licenses was signed by D, H. Connolly, C.A.A. administrator, and made provisions for reinstatement of private licenses in these cases:Pilots at schools engaged in training operations for the Government may regain their licenses when supervising Army. Navy or C.A.A. officials are satisfied (he holder “is an American citizen of unquestionable loyalty.”test pilots exceptedPilots at aircraft manufacturing plants and at other defense manufacturing plants, upon certification by Army or Navy Inspectors at the plants, ‘this apparently applied to test pilots.Pilot* engaged in ferry activities (delivering planes under lend-lease agreements.)AIJ other certificates may be reinstated only after satisfactory evidence of citizenship and loyalty accompanied by positive identification has been accrptrd by ti dcjr'gnaled representative of the C.A.A,lejwesFntaffves o:the