NetJets has filed lawsuits against Signature Flight Support and Landmark Aviation in an attempt to force the two FBO chains to extend contracted high-volume fuel discounts to Support Services clients at NetJets aircraft charter and management arm Executive Jet Management. Announced at the NBAA Convention in October, EJM’s Support Services provides flight departments and aircraft owners with a suite of services that offer cost savings via discounts leveraged by the buying power of NetJets and its subsidiaries.

In the Landmark case filed in the Franklin County Court in Columbus, Ohio, NetJets said that the FBO chain’s San Diego facility refused to provide discount fuel under the contract to a Support Services client last month. On March 22, the FBO chain then informed NetJets that it would not provide the contract fuel discount to any of “NetJets’ corporate flight department clientele” at any Landmark location.

Though the initial filing against Signature and parent BBA Aviation in the New York State Court is sealed, follow-on court documents suggest a nearly identical complaint against this FBO chain. In both cases, until court hearings start this summer the judges are requiring the FBO chains to provide contract discount fuel to existing, but not new, Support Services clients.

While Landmark and NetJets would not comment on pending litigation, Signature sidestepped its usual policy on these matters, saying, “NetJets is a highly valued customer and otherwise it’s business as usual” between the two companies. “Through the court order, Signature will provide established market contract fuel rates to existing Flight Support customers, but no new ones,” a Signature spokesman told AIN.