Testing of propellers, Other Engineering

Assignment Help:

Testing After Install

After installation of a propeller, the engine must be ground run in order to check the propeller for correct function and operation.  Aircraft propeller installations vary considerably, and no set testing procedure would be satisfactory for all aircraft.  It is imperative, therefore, that any particular installation should be tested in accordance with the approved AMM procedure, which will normally include the following general requirements:

  • The engine should normally be fully cowled, and the aircraft should be facing into wind before starting an engine run. It is sometimes recommended that the pitch change cylinder should be primed with oil before starting, by operation of the feathering pump.
  • The safety precautions appropriate to engine ground running should be taken, the controls should be set as required, and the engine should be started.
  • As soon as the engine is operating satisfactorily, and before using high power, the propeller should be exercised in the manner specified in the Maintenance Manual, to establish that the pitch change mechanism is operating.
  • The checks specified in the Maintenance Manual to confirm satisfactory operation of the propeller system, including constant speed operation, feathering, operation of the propeller pitch change throughout its range, synchronisation with other propellers on the aircraft, and operation of associated warning and indicating systems, should be carried out.
  • Engine running time should be kept to a minimum consistent with satisfactory completion of the checks, and a careful watch should be kept on engine temperatures to avoid overheating. With turbine engines, changes to operating conditions should be carried out slowly, to avoid rapid engine temperature changes, and to conserve engine life.
  • When all checks have been successfully carried out, the engine should be stopped, and a thorough inspection of all propeller system components should be carried out, checking for security, chafing of pipes and cables, and signs of oil leaks.
  • Don't forget to complete all paperwork related to the maintenance activity, including Duplicate Inspections.

Note:  If vibration was experienced during the engine run, the hub retaining nut should be re-tightened after the engine shaft has cooled down. 


Related Discussions:- Testing of propellers

FOCP, THE USER INTERFACE

THE USER INTERFACE

Totipotency, Why do only plant cell have totipotency?

Why do only plant cell have totipotency?

Probability distribution in matlab, I would like to ask in detail. How can ...

I would like to ask in detail. How can I attach the files?

Asset allocation, 7 refer(s) to the ability to convert assets to cash quick...

7 refer(s) to the ability to convert assets to cash quickly and at a fair market price and often increase(s) as one approaches the later stages of the investment life cycle

Difference between income & expenditure statement, Difference between incom...

Difference between income & expenditure statement P&L is to be ready by the Company or Dealing Origination which evolved in Dealing of any commodity or manufacturing of completed e

Hot and cold working, advantages and disadvantages of cold and hot working

advantages and disadvantages of cold and hot working

Principal of assembly buildings- fire protection engineering, Principal of ...

Principal of Assembly buildings- fire protection engineering: As assembly buildings accommodate members of the public they often accommodate people with disabilities. People

Pn junction diode, what is the effect of temperature on pn junction diode o...

what is the effect of temperature on pn junction diode of component

Iosipescu shear test, A second way to determine the shear modulus is to use...

A second way to determine the shear modulus is to use the Isopescu shear test. The sample is placed in a jig and loaded as shown. Under load, a region of pure shear exists

Engine controls - aircraft engine, Engine controls: Engine controls are...

Engine controls: Engine controls are very similar to flying controls, and the same types of equipment are used, such as rods, bellcranks and cables. Most control systems use ei

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd