UPDATE 1-Safran Q1 revenue rises 7.8 pct, targets reaffirmed

PARIS, April 26 (Reuters) - France's Safran on Tuesday posted a slightly higher-than-expected 7.8 percent increase in first-quarter revenue to 4.24 billion euros ($4.77 billion), led by double-digit aero engine and security gains, and reaffirmed full-year targets.