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Category quoted.
For programs without a Zonal Inspection Program (ZIP):
Although non-ZIP programs may already include some dedicated inspections of
wiring that may be reviewed for equivalency to new tasks identified by application
of the Enhanced Zonal Analysis Procedure, it is expected that a significant number
of new wiring inspections will be identified for introduction as dedicated tasks in the
System & Powerplant program. All new tasks identified by application of EZAP
PROGRAM TO ENHANCE AIRCRAFT ELECTRICAL WIRING INTERCONNECTION SYSTEM MAINTENANCE
Appendix A. Enhanced Zonal Analysis Logic Diagram and Steps 30
shall be uniquely identified to ensure they are not deleted during future program
development.
The following guide can be used to determine proper consolidation between EZAP
derived inspections and existing inspections of the same item or area with the caveat
that EZAP Stand-alone GVIs and DETs cannot be consolidated into a Zonal GVI.
Where a task is selected to be consolidated, the program documentation must
include a record identifying the task which has been consolidated for traceability
purposes.
a) Where the EZAP inspection interval and existing inspection interval are equal,
but the inspection levels are different, the more intense inspection will take
precedent (i.e., a 1C DET takes precedent over a 1C GVI).
b) Where the EZAP inspection interval and existing inspection interval are different,
but the inspection levels are equal, the more frequent inspection will take
precedent (i.e, a 1C GVI takes precedent over a 2C GVI).
c) Where the EZAP inspection interval and level are different than the existing
inspection interval and level, these tasks may be consolidated only when the
more frequent inspection is also the more intense (i.e., a 1C DET takes
precedent over a 2C GVI). When the more frequent inspection is less intense,
the tasks should not be consolidated.
For all programs, EZAP stand-alone tasks shall be uniquely identified in the program
documentation for traceability during future changes to the program. This is intended
to prevent the inadvertent deletion or escalation of EZAP stand-alone tasks without
proper consideration of the basis for the task and its interval.
For EZAP derived STC tasks, it may not be possible for the STC holder to determine
whether a ZIP exists on specific aircraft that will utilize the STC. Therefore, where a ZIP
exists, consolidation of EZAP derived STC tasks into a specific operator’s ZIP will be the
responsibility of the operator and subject to approval by the cognizant Civil Aviation
Authorities PMI.
In cases where the STC holder determines a requirement for a GVI that should not be
consolidated into a ZIP, this Stand-alone GVI should be specifically identified as such in
the EZAP derived ICAW for the STC.
PROGRAM TO ENHANCE AIRCRAFT ELECTRICAL WIRING INTERCONNECTION SYSTEM MAINTENANCE
Appendix B. Examples of Typical EZAP Worksheets 31
APPENDIX B. EXAMPLES OF TYPICAL EZAP WORKSHEETS
The following worksheets are provided as an example to assist in application of the EZAP logic. The worksheets may be adjusted by
the analyst to suit specific applications.
Sheet 1 Details of Zone
Sheet 2 Assessment of Zone Attributes
Sheet 3A Inspection Level Determination based on Rating Tables (for use where a dedicated Zonal Inspection Program exists)
Sheet 3B Inspection Level Determination based on Rating Tables (for use where no dedicated Zonal Inspection Program exists)
Sheet 4 Interval Determination based on Rating Tables
Sheet 5 Task Summary
Note: The interval ranges quoted in the rating table on Sheet 4 are solely to explain a typical arrangement of
values. For a particular application, these must be compatible with the interval framework used in the existing
maintenance or inspection program. They may be expressed in terms of usage parameter (e.g., flight hours or
calendar time) or in terms of letter check (as in the example).
For this report, the worksheets have been electronically pasted into this section. TCCA is in possession of the source files that can be
reformatted as necessary to achieve the level of quality required for distribution to industry review for review.
PROGRAM TO ENHANCE AIRCRAFT ELECTRICAL WIRING INTERCONNECTION SYSTEM MAINTENANCE
Appendix B. Examples of Typical EZAP Worksheets 32
Enhanced Zonal Analysis - Details of Zone Sheet 1 of 5
1. Zone Details (Boundaries, Access):
Pneumatic Components (valves, actuators)
Electrical Wiring - Power Feeder (high voltage, high amperage)
Electrical Wiring - Data Bus
Primary Flight Control Mechanisms
Electrical Components
ZONE NO: ZONE DESCRIPTION:
2. EQUIPMENT INSTALLED COMMENTS
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