How to develop maintenance program in aviation industry with considering cost, operational aspect. Comparing MSG System, FMEA principal and commercial aspect. Airline maintenance program is ultimately important for sustainability of airline business

2. Maintenance Steering Group
Conditioning
Monitoring
• Applies to
items that
have neither
Hard Time
limits nor On
Condition
maintenance
as their
primary
maintenance
policies
On –Condition
• A repetitive
inspections
or tests to
determine the
condition of
units or
systems,
comprising
servicing,
inspecting,
testing,
calibrating
and
replacement.
Hard Time limit
• A maximum
interval for
performing
maintenance
tasks on a
part or unit.
Such intervals
apply to
overhaul, but
also to the
total life of
the part or
unit.

3. Maintenance Steering Group
MSG 2
•Process
Oriented
MSG 3
•Task
Oriented

4. MSG 2 Analysis
Task that can be
done
Tasks that have
to be done
Tasks that
should be done

5. MSG 3
0 Task oriented process, analyses through system failure
from the top down.
0 Results in maintenance tasks that are performed for safety,
operational or economic reasons.
0 It involves preventive maintenance, performed before
failure occurs (and is intended to prevent failure) as well
as failure finding tasks.
RCM
• The Reliability Centered
Maintenance (RCM)
concept refined the logic
process leading to MSG-
3.
MSG 3 Rev 1
• This was a refining of
the original MSG-3 in
order to make it user-
friendlier. It led to the
elimination of the
Operating Crew
Monitoring strategy in
the original MSG-3
MSG 3 Rev 2
• This is a revision of the
MSG-3 policy. It provides
additional clarification
and guidelines on
development of
Corrosion Prevention
Control Programs
(CPCP).

6. MSG 3 Objective
0 To ensure realization of inherent safety and reliability
levels of the equipment
0 To restore safety and reliability to their inherent levels
when deterioration has occurred
0 To obtain the information necessary for the design
improvement of those items whose inherent reliability
proves inadequate
0 To accomplish these goals at minimum total cost, including
maintenance costs and the cost of residual failure

7. MSG 3 Divided Into 2 Sub Task
Scheduled Task
• Lubrication/servicing
(LU/SV)
• Operational Visual check
(OP/VC)
• Inspection-General
Visual/ Functional check
(GV/FC)
• Detailed Inspection (IN)
• Restoration (RS)
• Discard (DS)
Unscheduled Task
• Scheduled tasks
accomplished at specific
intervals
• Reports of malfunction
(usually originating
from operating crew)
• Data analysis

8. MSG 3 Flow Analysis

9. Maintenance Package
Manufacturer
• To provide the operator
with packaging options
for fleet maintenance
program
• Increase the production
efficiency of an
organization
Operator
• Increase aircraft
availability
• Reduce production
costs

10. Maintenance Package
Considerations
Operational
considerations
• Route structure
• Flight length
• Frequency of flight
Commercial
considerations
• Traffic patterns
• Seasonal
constraints
Technical
considerations
• Maintenance
program
• Manpower skills
• Tooling

11. Block Packaging
Background
0 This is focused on the principle of grouping all
maintenance tasks that require frequent repetition under
a letter check (i.e. “A”, “B”, “C”, “D” Checks).
0 This method produces a small number of relatively large
work packages having the disadvantage of a relatively long
maintenance ground time.

12. Block Packaging Conditions
Large airplane
fleet
High utilization
Spare airplane
available
Long range
operation
Flexible
manpower
Non-scheduled
maintenance
Single centrally
located
maintenance base
Utilization varies
with calendar
season
Contract
maintenance

13. Block Packaging Advantage
Disadvantage
Advantage
• Reduces spare requirements at
out stations
• Increased ground time
• Logistical considerations for
spares are also simplified.
• Accomplishment of
modifications
• Rectification of non-routines
• More efficient sequencing of
long jobs
Disadvantage
• Manpower requirements
• the risk of the airplane
becoming a parts department
• High component removal

14. Equalized/Phase/Progressive
Package
• Tasks are arranged into many small packages all
having approximately the same ground time, less
than 8 hours
Ground
Time
• Satisfies the availability requirements specified by
airline operations and scheduling
• The larger letter checks are segmented into smaller
but more frequent work packages
Commercial
• Helps to get the maximum life out of life-limited
componentsComponent

15. Equalized Considerations
Small aircraft
fleet
Low &
Constant
utilisation
No spare
airplane
Short range
operations
Manpower
equalization
Scheduled
operations
Multiple
maintenance
locations
Maintenance
performed in
house

16. Equalized Benefit & Loss
Advantage
• Simplifies manpower planning
• High aircraft availability
• Reduced ground time
• Frequent visit supports full
component life
• Balanced workload on small fleets
Disadvantage
• High spare requirement at out
stations
• Increase in production planning and
scheduling workload
• Careful planning is required due to
the limited ground time
• There is limited time for the
accomplishment of modifications
• Short jobs are inherently inefficient
• Limited time to identify and rectify
non-routines

17. Thank You