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

The compression after impact test, This Compression After Impact (CAI) test...

This Compression After Impact (CAI) test fixture was developed by the Boeing Company. The specimen, typically, but not necessarily, a quasi-isotropic laminate, is 6" long, 4" wide,

Cascaded, circit diagram and operation

circit diagram and operation

Compressor damage, Compressor Damage Foreign objects often enter engine...

Compressor Damage Foreign objects often enter engine air intakes either accidentally or through carelessness. Items such as pens, pencils cigarette lighters etc. can be drawn o

Qualitative risk assessment - fire protection engineering, Qualitative risk...

Qualitative risk assessment - fire protection engineering: NFPA 551 discusses the differences between qualitative risk assessment and quantitative risk assessment. Qualitat

Factors affecting accuracy, Factors affecting accuracy 1. The transduce...

Factors affecting accuracy 1. The transducer must be located in an appropriate place and with an appropriate orientation to measure the measurand accurately. 2. The introduc

Materials, Why Industries that manufacture racing cars prefers nickel based...

Why Industries that manufacture racing cars prefers nickel based alloys for engine components and iron based alloys for structural parts?

The ideal operational amplifier, THE IDEAL OPERATIONAL AMPLIFIER Althou...

THE IDEAL OPERATIONAL AMPLIFIER Although the characteristics of an ideal operational amplifier are unattainable, modern integrated circuit types can provide an extremely close

Help please, Judy Johnson is choosing between investing in two Treasury sec...

Judy Johnson is choosing between investing in two Treasury securities that mature in five years and have par values of $1,000. One is a Treasury note paying an annual coupon of 5.

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