CS-E 180  Propeller Functioning Tests

ED Decision 2007/015/R

(See AMC E 180)

(a)     If approval of the Engine for use with a Variable Pitch Propeller is sought by the Applicant, a sufficient portion of the tests prescribed in CS-P, must be made either during or on the completion of the endurance test of CS-E 440 or CS-E 740 to demonstrate that the Propeller-Engine combination will function satisfactorily. The minimum number of tests which will be acceptable for Engine approval is given below.

(b)     The following tests must be carried out:

(1)     Pitch change cycles

(i)      Turbine Engines

(A)     Fifty forward pitch change cycles, by operation of Propeller control. (Only applicable when a separate Propeller control is provided). Each cycle must include the maximum range of pitch likely to be experienced in normal use.

(B)     100 operations with-drawing the flight fine pitch lock. These may be combined with the Engine decelerations prescribed in CS-E 740 for the endurance test.

(ii)      Piston Engines – For Engines to be approved for use with a variable pitch Propeller, 100 representative forward pitch change cycles must be made across the range of pitch and rotational speed.

(2)     10 feathering cycles. In addition, for turbine Engines, where the oil tank is to be approved as part of the Engine, the ability to complete one cycle (i.e. one feather and unfeather) when the supply of oil has been reduced to the feathering reserve oil (see CS-E 570(f)(3)(i)) must be demonstrated.

(3)     200 reverse pitch change cycles (braking or manoeuvring, whichever is greater), and sustaining the appropriate maximum declared Engine conditions for 1 minute during each cycle. In this case, the periods of the endurance test covering the range of cruising conditions may be reduced by a total of 3 hours.

(4)     1 reverse (manoeuvring) pitch change cycle, sustaining the appropriate maximum declared Engine conditions for 5 minutes.

(c)      Additional tests with Reversible Pitch Propellers on Piston Engines -

(1)     Where approval of an Engine for use with Reversible Pitch Propellers is sought, the appropriate tests of Certification Specifications for Propellers must be run on Engines sufficiently representative of the type design.

(2)     After completion of these tests, those parts of the Engines which may be affected by the reversed thrust or air flow, must be removed and examined and must be shown to have suffered no adverse effects.

(d)     Any other tests considered necessary to demonstrate that the Propeller-Engine combination will function satisfactorily.

[Amdt. No.: E/1]