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

Post graduation, i am doing be in mechanical engg in india. so can i do my ...

i am doing be in mechanical engg in india. so can i do my masters in geoophysic ?

Lead time, Enumerate possible impact of having inadequate system design in ...

Enumerate possible impact of having inadequate system design in the lead time and engineering cost?

Longitudinal trim, A trimmed flight condition is perhaps best thought of as...

A trimmed flight condition is perhaps best thought of as an equilibrium condition. The simplest trim condition is straight-and-level flight, in which the forces (weight, propulsive

Highway maintenance, Various types of Bituminous Course? Explain each

Various types of Bituminous Course? Explain each

Sonic airflow - aircraft maintenance, Sonic airflow though divergent and co...

Sonic airflow though divergent and convergent ducts When a flow of fluid (i.e. gas) flows at sonic speed through a convergent duct a shock wave forms at the exit area of the du

Corporate Governance, What is the status of corporate governance in UAE?

What is the status of corporate governance in UAE?

Java, 2. Differentiate between stream oriented and data gram oriented socke...

2. Differentiate between stream oriented and data gram oriented socket in java?

Retaining wall design, #questionYour search - design a trapezoidal retainin...

#questionYour search - design a trapezoidal retaining wall(assume dimensions) ,bulk density 15kN per metre cube ,coefficient of friction of 0.7,angle of internal friction 15degres

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