AMC E 60 Provision for instruments

(1)Under the specifications of CS-E 60(a), the Engine manufacturer should define the instrumentation which is necessary for Engine operation within its limitations and also make provision for installation of this instrumentation. In addition to powerplant instrumentation required for aircraft certification, the Engine safety analysis might show the need for specific instrumentation providing information to the flight crew or maintenance personnel for taking the appropriate actions in order to prevent the occurrence of a Failure or to mitigate any associated consequences.

(2)Care should also be exercised in selecting the position on the Engine at which a particular parameter, such as oil pressure, is sensed in order to ensure that the indication is appropriate for the intended protection of relevant components. For example:

(a)The pick-up point on the Engine for the oil pressure gauge and the low oil pressure warning device, where applicable, should be suitably chosen with due regard to all critical components to ensure a satisfactory indication of the oil pressure to the main Engine bearings.

(b)Unless otherwise agreed, there should be no relief valve or other component liable to Failure between the oil pressure gauge and warning device connection and the main Engine bearings. Filters necessary to protect oil jets or metering orifices should be suitably chosen to reduce the possibility of blockage to a minimum and should be accessible for periodic inspection.

(3)In complying with CS-E 60(c), for example, because the inadvertent deployment of a reverser in-flight is a Hazardous Engine Effect, the thrust reverser position control and position indicating systems should be separate, such that Failures which could affect the thrust reverser position would not cause loss of the correct flight deck indication of reverser position.

(4)In complying with CS-E 60(d), the recording system should only be able to be reset by the maintenance personnel and not by the flight crew, in order to prevent further Engine operation without having taken the prescribed mandatory post-flight inspection and maintenance action.

[Amdt. No.: E/1]