CS 25.1585 Operating procedures

• ED Decision 2003/2/RM found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

CS 25.1585 Operating procedures ED Decision 2003/2/RM (a) Operating procedures must be furnished for – (1) Normal procedures peculiar to the particular type or model encountered in connection with routine operations; (2) Non-normal procedures for malfunction cases and failure conditions involving the use of special systems or the alternative use of regular systems; and (3) Emergency procedures for foreseeable but unusual situations in which immediate and precise action by the crew may be expected to substantially reduce the risk of catastrophe. (b) Information or procedures not directly related to airworthiness or not under the control of the crew, must not be included, nor must any procedure that is accepted as basic airmanship. (c) Information identifying each operating condition in which the fuel system independence prescribed in [CS 25.953](#_DxCrossRefBm1709821424) is necessary for safety must be furnished, together with instructions for placing the fuel system in a configuration used to show compliance with that section. (d) The buffet onset envelopes determined under [CS 25.251](#_DxCrossRefBm1709820667) must be furnished. The buffet onset envelopes presented may reflect the centre of gravity at which the aeroplane is normally loaded during cruise if corrections for the effect of different centre of gravity locations are furnished. (e) Information must be furnished that indicates that when the fuel quantity indicator reads ‘zero’ in level flight, any fuel remaining in the fuel tank cannot be used safely in flight. (f) Information on the total quantity of usable fuel for each fuel tank must be furnished.