GE has been grappling with cash headwinds since before Larry Culp took the reins as chief executive officer in October. The former Danaher Corp. boss has made progress in reducing GE's debt, addressing operational challenges and boosting cash, including a sale of Wabtec Corp. shares this week that will bring in about $1.5 billion. Culp himself has said GE's turnaround effort will be a "multiyear transformation."