Aircraft Maintenance Fundamentals Flashcards
(60 cards)
What are the 2 types of maintenance
Scheduled and non Scheduled
What is scheduled maintenance?
Scheduled maintenance consists of planned maintenance and inspections that are carried out at
specified intervals in accordance with an approved maintenance programme.
What is non scheduled maintenance
Non-scheduled maintenance is that which can’t be
planned. It could arise from failures, defects or damage
that occur during the day to day running of the aircraft.
What are the 3 types of maintenance frequency? What do they mean?
●Fixed life, (or hard life) is where the
maintenance interval is defined, after this time
it must be overhauled or scrapped.
● On Condition, where the life is dependent on
the condition of the item as observed at regular
periodic inspections.
● Condition Monitored, which relies on routine
surveillance and evaluation of the system
and/or component performance and failure rates.
What is an approved facility? Who is it approved by?
All work, including Repair and Overhauls must be
carried out at facilities approved by the Civil Aviation
Authority (CAA) in the case of New Zealand , this being
the CAANZ.
Name the maintenance periods
Calander time
Airframe hours
Flight cycles
Operating hours
Difference between airframe hours and operating hours
Airframe hours are calculated and recorded from take off and touch down
Operating hours is time measured from when an engine, component or unit is being operated
How are light aircraft scheduled inspections typically designated
Pre-flight; the inspection is completed before
each flight. This is usually followed by an Afterflight service, which includes aircraft
replenishments.
100 hour; the inspection is completed following
every 100 flying/airframe hours.
Annual inspections are completed once every
calendar year (12 months from date of last
annual inspection).
Progressive inspections can be used instead of
a single annual inspection if it is not
economical to have the aircraft out of service
for the time taken for an annual inspection.
Then the annual inspection can be divided into
smaller portions and spread throughout the
year
How do large commercial aircrafts break up work?
Workcards
What are the large aircraft checks
Service check
A check
B check
C check
D check
What is a service check?
Review of the Log book and
maintenance forms (i.e.
time controlled items)
Exterior visual checks.
Routine aircraft servicing,
such as checking hydraulic
fluids, engine oil & general
lubrication.
Required no more than 48
elapsed calendar hours
from the last Check
maintenance, A, B or C
Check
What is an A check
Review of the Log book and
maintenance forms.
Exterior visual checks.
Routine and specific
aircraft inspections.
Replacement of timelimited items
Required no more than 125
flight hours from the last A
and/or C Check
What is a B check
Includes A Check items,
plus calendar items
Every 3 months
What is a C check
Includes A and B Check
items.
Detailed inspections of the
aircraft, components,
engines, and appliances.
Required every 24 months
or no more than 4000 flight
hours from the last C
Check
What is a D check
Includes all C Check items.
Extensive disassembly and
opening up of the aircraft.
Weight and balance check.
Flight test after operational
checks.
no more than 9000 flight
hours or 4 calendar years,
from the last D Check
Definition of inspection
The depth of any inspection shall be sufficient to
ascertain that the item is free from any defect
detrimental to airworthiness and that it will remain
serviceable until it is next inspected on a check of the
same level.
Scheduled inspections are usually for “condition” and
“security
What is condition and security
Condition is the wear and tear of something and the condition it’s in and security is how secure it is to the aircraft
Types of inspections
In situ
Detailed inspection
Special detailed inspection
Structural inspection
Internal and external Inspection
What is an in situ inspection
Inspection of part without removal from the aircraft. Carried out within the limits of access
What is a detailed inspection
Detailed Inspection
Close intensive visual inspections of highly defined
structural details or locations searching for evidence of
structural irregularity.
What do you use for special detailed inspections?
Non-destructive tests (NDT)
What is a structural inspection
A “Structural Inspection” is an examination of an item
against a specific standard to detect irregularities and
discrepancies such as wear, deterioration, damage,
corrosion, cracking etc.
e. External & Inte
Difference between functional test and inspection
Functional check is operating the system where as inspection is not operating
What does replacement mean
To remove an item and install a new serviceable item
