MSG-3 Awareness Flashcards
Maintenance program history
The first primary process of maintenance was called________________
Hard Time (HT) this was when a part was removed and overhauled, essentially zero timing it.
Maintenance program history
Secondary primary maintenance process was referred to as________________
On-Condition(OC) On- Condition required a part to be periodically inspected or checked against a standard.
History
MSG
Maintenance Steering Group-formed with a mandate to formulate a
decision logic process used for development of the initial scheduled maintenance requirements for new aircraft.
History
MSG-1
Maintenance Steering Group created MSG-1 using a decision logic diagram for the first time, both hard-time and On-Condition processes were sued for developing routine Maintenace tasks.
History
MSG-2
In 1970 MSG-2 introduced the third maintenance process called Condition- Monitoring(CM). Looking at acceptable levels of mechanical performance, the monitoring of the failure of parts allowed for forecasting of parts failure without adverse effect on operational safety.
History
MSG-2 processes ware derived from one of three primary processes.
Hard time
ON- Condition
Condition Monitoring
or some combination of these
History
MSG-2 was difficult to manage because…
it required so many components to be individually tracked and it did not differentiate between safety reasons vs economic reasons.
Historical MSG-2 bottom up process..
inspections were performed from small to large.
Starting with
Components
Assemblies
SUbystems
Systems
Major Division(like structures, powerplant, and systems)
Maintenace Steering Group Downfalls
In 1979 ATA identified shortcomings in MSG-2 and sought to improve on it because of increased complexity of new aircraft, large amount of component tracking and economic vs safety differentiation.
MSG-2 did not address regulations related to _______ and ________ of structures. These are now accounted for in the __________programs.
damage tolerance and fatigue evaluation
Corrosion Prevention and Control Programs (CPCP)
In 1979 the ATA task force started the development of MSG-3 a__________ Maintenace process.
Task Oriented
The decision tree methodology of MSG-3 had the primary purpose of
Separating safety related items from economic and
Defining adequate treatment of hidden functional failures
MSG-3 eliminates all non-significant functions and produces_____________
higher safety standards
MSG-3 is a system drive, _____________, and task oriented process.
Top-Down
Under MSG-3 logic tasks are separated into _______________.
Safety and Economic Categories
MSG-3 assesses maintenance tasks at the _____________________ Level rather than _____________ level
system level, component level
FAA policy states that the latest MSG analysis
procedures must be used for the development of routine scheduled maintenance tasks for all new or derivative [Part 121] aircraft. It Is the ONLY METHODOLOGY accepted by the airworthiness authorities.
According to Advisory Circular AC-121-22A
What MSG methodology does soutwest follow?
MSG-3
What Advisory Circular states that the latest MSG analysis procedure must be used for the development of routine scheduled maintenance tasks for all new or derivative aircraft?
Advisory Circular AC-121-22A
MSG-3 activities are assessed at the _____ level rather than the _____ level.
system , component
