US Airways and General Electric have modified an aircraft lease and financing agreement struck last year to keep the carrier airborne during its restructuring, bankruptcy court documents showed on Tuesday.

Without new terms from its largest creditor and aircraft financier, US Airways said it would not be able to conclude its bankruptcy successfully and complete its planned merger with America West.

The agreement accelerates a reduction in aircraft rental rates, extends the time line for credit line payments and speeds the return of certain mainline jets to GE.

It also proposes to shift financing and delivery of certain Brazilian-made Embraer regional jets from US Airways to Republic Airways, a US Airways equity partner.

The restructured deal with GE also requires US Airways to file its bankruptcy reorganization plan by June 30, which the airline says it plans to do, and step out of court protection by October 31.

The new agreement with GE must be approved by a federal bankruptcy judge in Virginia. A hearing on the plan is scheduled for June 23.

US Airways and America West plan to finalize their merger in the autumn.