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
MRBR
Maintenance Review Board Report, an FAA approved Document.
MRBR was created using MSG-3 methodologies and contains the ____________tasks necessary to maintain the __________ of the aircraft
minimum required, airworthiness.
The process to update the MRBR is outlined in
FAA Advisory Circular 121-22A
The process to update the MRBR involes the following groups
-Maintenance Working Groups (MWG)
– Industry Steering Committee (ISC)
– Maintenance Review Board (MRB)
IP44
Issue Paper 44
MPD
Maintenance Planning Document
Southwest Airlines maintenance program is comprised of several documents
Maintenance Planning Document (MPD),
Boeing Maintenance Manual,
Boeing Task Cards,
Service Letters (SL),
Airworthiness Directives (AD),
Vendor Manuals,
Service Bulletins (SB)
You should not consider the MPD as all inclusive
Southwest has final responsibility of what to do and when to do it except in requirements identified as_______or _____requirements.
AWL or CMR requirements( Airworthiness Limitations and Certification Maintenance requirements)
AWL
Airworthiness Limitations
CMR
Certification Maintenance Requirements
SCI/AWL
Special Compliance Items/Airworthiness Limitations
CDCCL
Critical Design Configuration Control Limitation
What Organizations make up the MRBR process?
(MWG) Maintenance Working Groups
(ISC) Industry Steering Committe
(MRB) Maintenance Review Board
What are the three MSG -3 Program Groupings?
Systems and Powerplant- functional and/or operational checks
Structures Program- Detection of Corrosion
Zonal Program(ZIP) - General Condition of each zone
The MRBR is an FAA Approved report
(True or False?)
TRUE
What are ALI’s ?
Airworthiness Limitations are things that must be checked regularly to keep the airplane safe
CDCCL
Critical Design Configuration Control Limitations-are the most important things that must be checked to keep the airplane safe. They are checked anytime maintenance is done in the area and do not have a regular schedule
Can AWLs be escalated without approval of FAA Oversight Office?
no Airworthiness limitations cannot be escalated without the approval of FAA.
CMR
Certification Maintenance Requirements
About ONe star CMR
One Star CMRs are mandatory and cannot be changed without the approval of the FAA Oversight Office
ABout Two star CMR
Two Star CMRs can be adjusted in accordance with each operator’s approved escalation program or an approved reliability program, but cannot be deleted without prior FAA Oversight Office approval
CCMR
Candidate Certification Maintenance Requirements (CCMR) are MRB requirements that were considered but not selected as CMRs
What do we need to do to escalate CCMRs
Contact Boeing
What is an SSI?
A Structural Significant Item (SSI) is any detail, element or assembly, which contributes
significantly to carrying flight, ground, pressure or control loads, and whose failure could
affect the structural integrity necessary for the safety of the aircraft.
- How many Failure
Effect Category (FEC) are there for Systems and Powerplant
Maintenance Program?
Categories 5-9
Structure not categorized as an SSI will be categorized as _____
Other Structure. Other Structure is defined both externally and internally within zonal boundaries.
What does EZAP stand for?
Enhanced Zonal Analysis Program/Procedure (EZAP) will be used to determine appropriate
inspections for zones containing EWIS and have potential for combustible materials being
present.
- Where are requirements for MX Program Interval Adjustments located?
MPM 15.12
What is MSG-3?
an analytical methodology, officially recognized by (FAA/TCCA/EASA) based on reliability centered maintenance (RCM)
