Powerplant - AM.III.M.K6 - Propeller servicing, maintenance, and inspection requirements Flashcards
Where do you find a list of the lubricants that are approved for use in a constant speed propeller?
in the maintenance manual for the propeller
what is the extent of the repairs a mechanic with a powerplant ratingcan make to a propeller?
only minor repairs or minor alterations
where can examples of acceptable repairs to aluminium alloy propeller blades be found?
- in AC 43.13-1B, chapter 8, section 4
- and in the propeller manufacturer’s service manuals
Is it permissible to cold straighten a damaged aluminium alloy propeller blade to facilitate shipping it to a repair station?
no, this could cause hidden damage that may render the blade non-repairable
What would be the classification of maintenance for shortening a propeller blade?
major repair
May transverse cracks in a metal propeller blade be repaired?
no, a transverse crack of any size is reason for rejecting the blade
what damage to an aluminium alloy propeller blade can be repaired by a mechanic holding a powerplant rating?
- small roughness
- nicks
- scratches in the leading edge of the blades
How are small nicks removed from the leading edge of a propeller blade?
file them out with a fine file or stone, leaving a smooth contour
How can you determine that a surface scratch in an aluminium alloy propeller blade is nit actually a crack?
- clean the damage out to a saucer shaped depression
- spray area with a dye penetrant liquid
- allow time to seep into potential crack
- apply developer
- if crack is present, developer will blot the dye and highlight a crack
Who, or what facility, is authorised to perform major repairs to a propeller?
An FAA approved propeller repair station that is authorised for that specific propeller
What checks and maintenance is a mechanic with a powerplant rating allowed to make on a propeller? (4)
- check the track of the peopeller blades
- remove small nicks and scratches from the blades
- check the dynamic balance of a propeller
- lubricate the propeller
What adjustment can a mechanic with a powerplant rating make to a propeller governor?
adjust the maximum RPM stop
What instrument is used to measure the blade angle of a propeller?
a universal propeller protractor
Where is the propeller protractor placed to measure the propeller blade angle?
- at a distance from the center of the propeller hub
- this distance is specified in the propeller maintenance manual in terms of propeller blade stations
