Section 135.83 - Operating information required(a) The operator of an aircraft must provide the following materials, in current and appropriate form, accessible to the pilot at the pilot station, and the pilot shall use them:(2) For multiengine aircraft or for aircraft with retractable landing gear, an emergency cockpit checklist containing the procedures required by paragraph (c) of this section, as appropriate.(3) Pertinent aeronautical charts.(4) For IFR operations, each pertinent navigational en route, terminal area, and approach and letdown chart.(5) For multiengine aircraft, one-engine-inoperative climb performance data and if the aircraft is approved for use in IFR or over-the-top operations, that data must be sufficient to enable the pilot to determine compliance with § 135.181(a)(2) .(b) Each cockpit checklist required by paragraph (a)(1) of this section must contain the following procedures: (1) Before starting engines;(c) Each emergency cockpit checklist required by paragraph (a)(2) of this section must contain the following procedures, as appropriate:(1) Emergency operation of fuel, hydraulic, electrical, and mechanical systems.(2) Emergency operation of instruments and controls.(3) Engine inoperative procedures.(4) Any other emergency procedures necessary for safety.