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

Scr, briefly explain the switching characteristics of SCR

briefly explain the switching characteristics of SCR

Gated pattern, Gated pattern is used to produce good casting. It is esse...

Gated pattern is used to produce good casting. It is essential to make sure that full supply of molten metal flow into every part of the mould. Provision for easy passage of the

Programming, A charitable organization wants to design a special ATM machin...

A charitable organization wants to design a special ATM machine to be used by needy people. The association supplies the needy person with a pin number to be able to use the ATM

Propeller construction, PROPELLER CONSTRUCTION METAL PROPELLERS Mo...

PROPELLER CONSTRUCTION METAL PROPELLERS Most metal propellers have forged alloy blades protected from corrosion by anodising and often further protected by polyurethane en

Engineering signals, Engineering Signals A signal is a variation of a m...

Engineering Signals A signal is a variation of a measurable quantity that conveys information about the behaviour of a system. • A signal can depend upon a single variable o

Aviation legislation - dealer’s certificate , DEALER'S CERTIFICATE Refere...

DEALER'S CERTIFICATE Reference: When the sale of an aircraft involves flight without a Certificate of Registration, The C.A.A. will permit the aircraft to fly under certain re

Types of patterns in manufacturing, Types of patterns : These  depends upo...

Types of patterns : These  depends upon many factors like the bulk of casting, type of moulding processes, number of castings required and the anticipated difficulty of moulding,

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