Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria under the specified conditions of assessment, and must include:
applying relevant WHS practices
using approved maintenance documentation and aircraft publications relating to the instrument system being maintained
recognition of system and component defects/external damage, correct installation, connection of plugs, terminations, and attaching hardware (including cabling/harnesses) and security in:
pitot/static systems and associated instruments and systems
flight instruments
GPWS and FDR
stall warning, angle of attack and stall avoidance systems
navigation systems (compasses and AHRS)
pressure measurement, position indicators, engine/auxiliary system indication systems, including fuel quantity and flow.
It is essential that inspection procedures, cleanliness requirements and safety precautions applicable to the instrument system being maintained are fully observed, understood and complied with. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice (including the timely involvement of supervisors or other trades) is critical.
Evidence of transferability of skills and knowledge related to inspection is essential. This is to be demonstrated through application across a range of aircraft instrument systems and components listed in the Assessment Conditions.
Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:
component attachment methods
connection of hardware
instrument system maintenance requirements
the basic layout (block diagram level), function and operation of:
flight instruments, including:
ASIs
VSIs
air data systems and components
machmeters
altimeters, including servo and encoding altimeters
turn and slip indicators
AHs
DGs
angle of attack and stall warning/avoidance systems
pitot/static systems
navigation systems:
direct reading compasses
gyro compasses
AHRS
GPWS
turbine engine instruments, including:
temperature and pressure, including thermocouples, sensors and transmitters
speed, including mechanical and electric tachometers
thrust, including fan, propeller and jet
torque
fuel flow
vibration
auxiliary transmitter/indicator measuring systems, including:
hydraulic pressure and temperature
pneumatic pressure
transmission oil pressure and temperature
fuel remaining/used
fuel quantity indication
component position (e.g. doors, flaps, speed brakes and landing gear)
FDR systems
relevant WHS practices
instrument system maintenance requirements
relevant maintenance manuals
relevant regulatory requirements and standard procedures.