Possible Clues:

• Worry a hit might spoil Dreamliner's quality?
• Fit to fly
• Fit to go up?
• Like a well-made kite, suitable for Auntie?
• Bearing dignitary, fit to fly
• How rarity became fit to fly
• Ready to take off
• Permitted to fly - casual about price
• How rarity may be fit to fly
• Safe to fly