14 C.F.R. § 121.549 Flying equipment.
Title 14 - Aeronautics and Space
(a) The pilot in command shall ensure that appropriate aeronautical charts containing adequate information concerning navigation aids and instrument approach procedures are aboard the aircraft for each flight. (b) Each crewmember shall, on each flight, have readily available for his use a flashlight that is in good working order.
Title 14: Aeronautics and Space
PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS
Subpart T—Flight Operations
§ 121.549 Flying equipment.