15.21 Flashcards
What direction should an aircraft be parked?
Into the wind
On the ground when the engines are running what is allowed to be carried out?
Engine trimming
What do most manufactures recommended with engine trimming?
Final trim adjustments are made in the increase direction
What does the HP rotor speed N2 measure?
HP spool speed
Low pressure rotor speed N1 measure what?
Rotor speed of low pressure spool
What is used to judge the engine performance?
Comparing N1 and N2 indications
On turbo prop / shaft engines what are the most common sensing systems?
Hydro mechanical, electronic
Are engine components high cost?
Yes
What does ACMS stand for?
Aircraft condition monitoring system
What does DMU stand for?
Data management unit
What does a boroscope do?
Inspects internal parts of the engine
How does a boroscope gain access to the engine?
Through access plugs
What do modern engines use for vibration monitoring?
Piezoelectric accelerometers
What is hard time?
Preventative process involves removing items for overhaul or replacing
What are the 2 types of servicing?
Scheduled and unscheduled
