Nos. 72-1990, 72-2129, 72-2207. January 9, 1974. Rehearing Denied February 7, 1974. Marcel Mallet-Prevost, Asst. Gen. Counsel, NLRB, Allison W. Brown, Jr. (argued), Washington, D.C., Abraham Siegel, Director, Region 31, NLRB, Los Angeles, Cal., for NLRB. David A. Maddux, Sheppard, Mullin, Richter Hampton, Los Angeles, Cal., A. D. Gallay (argued), Fellner Rovins, New York City, for Lufthansa. Robert M. Simpson, Rose, Klein Marias, Los Angeles, Cal., Plato E. Papps, Washington, D.C., for IAM. Charles