CS-E 60  Provision for Instruments

ED Decision 2007/015/R

(See AMC E 60)

(a)     Provision must be made for the installation of instrumentation necessary to ensure operation in compliance with the Engine operating limitations. Where, in presenting the safety analysis, or complying with any other specification, dependence is placed on instrumentation which is not otherwise mandatory in the assumed aircraft installation, then this instrumentation must be specified in the Engine instructions for installation and declared mandatory in the Engine approval documentation.

(b)     A list of the instruments necessary for control of the Engine must be provided in the Engine instructions for installation. The overall limits of accuracy and transient response required of such instruments for control of the operation of the Engine must also be stated so that the suitability of the instruments as installed may be assessed.

(c)      The sensors together with associated wiring and signal conditioning must be segregated, physically and electrically, to the extent necessary to ensure that the probability of a Fault propagating from instrumentation and monitoring functions to control functions or vice versa is consistent with the Failure effect of the Fault.

(d)     Rotorcraft turbine Engines having 30-Second and 2-Minute OEI Power Ratings must (See AMC E 60(d)):

(1)     Have means, or provision for means, to alert the pilot when the Engine is at the 30-Second OEI and the 2-Minute OEI Power levels, when the event begins, and when the time interval expires.

(2)     Have means or provision for means, which cannot be reset in flight, to

(i)      Automatically record each usage and duration of power at the 30-Second and 2-Minute OEI Power levels.

(ii)     Alert maintenance personnel in a positive manner, that the Engine has been operated at either or both of the 30-Second and 2-Minute OEI Power levels and permit retrieval of recorded data; and

(3)     Have means, or provision for means, to enable routine verification of the proper operation of the above means.

(e)     Instrumentation enabling the flight crew to monitor the functioning of the turbine cooling system must be provided unless evidence shows that:

(1)     Other existing instrumentation provides adequate warning of Failure or impending Failure, or

(2)      Failure of the cooling system would not lead to Hazardous Engine Effects before detection, or

(3)     The probability of Failure of the cooling system is Extremely Remote.

Appropriate inspections must be promulgated in the relevant manuals.

[Amdt. No.: E/1]