Appendix G
Group, Aging Transport Systems Rulemaking Advisory Committee, December 29, 2000, http://www.mitrecaasd.org/atsrac/intrusive_inspection.html.
• FAA Aging Transport Non-Structural Systems Plan, July 1998, http://www.faa.gov/aircraft/air_cert/design_approvals/transport/Aging_Aircraft/media/aging_tra nsport_plan.pdf.
• National Transportation Safety Board Safety Recommendations A-00-105 through -108, September 19, 2000, http://www.ntsb.gov/recs/letters/2000/A00_105_108.pdf.
• Wire System Safety Interagency Working Group, National Science and Technology Council Committee on Technology, “Review of Federal Programs for Wire System Safety, Final Report” (2000), http://www.ostp.gov/html/wire_rpt.pdf.
• Aging Systems Task Force, Aging Transport Systems Task 1 & 2 Final Report, August 1, 2000, http://www.mitrecaasd.org/atsrac/final_reports/Task_1&2_Final%20_August_2000.pdf.
• Aging Transport Systems Rulemaking Advisory Committee Task 3 Final Report, March 26, 2001, http://www.mitrecaasd.org/atsrac/final_reports/Task_3_Final.pdf.
• Aging Transport Systems Rulemaking Advisory Committee Task Group 4 Final Report, Standard Wiring Practices, September 28, 2000, http://www.mitrecaasd.org/atsrac/final_reports/Task_4_Final_Report_Sept_2000.pdf.
• Aging Transport Systems Rulemaking Advisory Committee (ATSRAC) Task 5 Final Report, Aircraft Wiring Systems Training Curriculum and Lesson Plans, March 9, 2001, http://www.mitrecaasd.org/atsrac/final_reports/Task_5_Final_March_2001%20.pdf.
• ATA Specification 117, Wiring Maintenance Practices/Guidelines, http://www.iasa.com.au/folders/Safety_Issues/Aircraft_Wire/ATAonwiring.html.
e. Other Documents.
• Operator/Manufacturer Scheduled Maintenance Development, Revision 2009.1, ATA Maintenance Steering Group (MSG-3). (May be obtained from the Air Transport Association of America; Suite 1100, 1301 Pennsylvania Ave, NW, Washington, DC 20004-1707.)
G-3
Appendix H
Appendix H
1. EZAP Worksheets for Use by Applicants.
• EZAP Worksheet 1: Enhanced Zonal Analysis – Details of Zone
• EZAP Worksheet 2: Enhanced Zonal Analysis – Assesment of Zone Attributes
• EZAP Worksheet 3A – For Airplane Models with a Dedicated Zonal Inspection Program (ZIP): Enhanced Zonal Analysis – Inspection Level Determination Based on Zone Size, Density, and Potential Impact of Fire
• EZAP Worksheet 3B – For Programs without a Dedicated Zonal Inspection Program (ZIP): Enhanced Zonal Analysis – Inspection Level Determination Based on Zone Size, Density, and Potential Impact of Fire
• EZAP Worksheet 4: Enhanced Zonal Analysis – Interval Determination Based on Hostility of Environment and Likelihood of Accidental Damage
• EZAP Worksheet 5: Task Summary H-1
EZAP WORKSHEET 1 05/04/10 Enhanced Zonal Analysis - Details of Zone (steps 1 and 2 of figure 1) Zone Number: Zone Description:
Hydraulic plumbing Comments Hydraulic component (valves, actuators, pumps) Pneumatic plumbing Pneumatic components (valves, actuators) EWIS - power feeder (high voltage, high amperage) EWIS - motor driven devices H-2 EWIS - instrumentation and monitoring EWIS - data bus Electrical components Primary flight control mechanisms Secondary flight control mechanisms Engine control mechanisms Fuel system components Insulation Oxygen system components Potable water system components Appendix H AC 25-27A Waste water system components
EZAP WORKSHEET 2 05/04/10 Enhanced Zonal Analysis - Assessment of Zone Attributes (steps 3 through 7 of figure 1) Zone Number: Zone Description:
Answers and Explanations NO (Notes: Steps 1 and 2 completed on worksheet 1)
3. Does the zone No further action is contain EWIS? YES necessary
3.
NO . Is wiring or other NO
4. Are there, or are there EWIS components likely to be, close to both primary combustibles in the YES AND back-up hydraulic, YES zone? mechanical, or electrical flight controls?
5. Is there an effective NO 8. EWIS inspection task to significantly tasks determination.
reduce the likelihood of accumulation of YES 3A and 3B See worksheets combustible materials?
6.
6. Define task and interval. List on Continue the analysis 7. Appendix H AC 25-27A worksheet 5, Task Summary area
EZAP WORKSHEET 3A - For Airplane Models with a Dedicated Zonal Inspection Program (ZIP) 05/04/10 Enhanced Zonal Analysis - Inspection Level Determination Based on Zone Size, Density, and Potential Impact of Fire (step 8 of figure 1, refer to figure 2) Zone Number: Zone Description:
Density / Zone Size —→ Zone Size Inspection Level Determination Based on Potential Effect of Fire in the Zone + Assessment Small Medium Large → Size / Density Factor 1 3 Low 1 2 Low Zonal GVI Zonal GVI Zonal GVI Density Medium 2 2 Potential Zonal GVI + Zonal GVI + Effects of Fire Medium Zonal GVI stand-alone GVI of stand-alone GVI of in the Zone some EWIS some EWIS High 2 Zonal GVI + Zonal GVI + Zonal GVI + High stand-alone GVI of stand-alone GVI and/or stand-alone GVI and/or some EWIS DET of some EWIS DET of some EWIS Circle appropriate result & insert below RESULT Circle appropriate result and answer questions in the boxes below YES Answers and Explanations
1. Is a zonal GVI alone 2. List zone effective for the entire description and zone?* boundaries for zonal GVI
3. Define specific items/areas in the 2 Zonal GVI must be zone for which a augmented with a stand-alone GVI is stand-alone GVI and/or a DET justified inspection
• If answer to box 1 is "YES," answer box 2 only and then continue the analysis on worksheet 4 in order items/areas in the 4. Define specific zone for which a DET Appendix H AC 25-27A to determine the task interval. is justified If answer to box 1 is "NO," answer boxes 2, 3, and 4 and then continue the analysis on Worksheet 4 in order to determine the task interval.
EZAP WORKSHEET 3B - For Programs without a Dedicated Zonal Inspection Program (ZIP) 05/04/10 Enhanced Zonal Analysis - Inspection Level Determination Based on Zone Size, Density, and Potential Impact of Fire (step 8 of figure 1, refer to figure 2) Zone Number: Zone Description:
Density / Zone Size -• Zone Size Inspection Level Determination Based on Potential Effect of Fire in the Zone
• Assessment Small Medium Large • Size / Density Factor 2 Low 1 2 GVI of all EWIS in zone at GVI of all EWIS in zone at GVI of all EWIS in zone at Low same interval same interval same interval Density Medium 2 2 Effects of Potential Medium GVI of all EWIS in zone at same interval same interval + GVI of some GVI of all EWIS in zone at EWIS at more frequent GVI of all EWIS in zone at same interval + GVI of some EWIS at more Fire in the Zone interval frequent interval High 3 GVI of all EWIS in zone at GVI of all EWIS in zone at GVI of all EWIS in zone at same interval + GVI of some same interval + GVI of some High same interval + GV of some EWIS at more EWIS at more frequent EWIS at more frequent Circle appropriate result & insert below frequent interval interval and/or DET of some EWIS interval and/or DET of some EWIS RESULT Circle appropriate result and answer questions in the boxes below YES Answers and Explanations
1. Is a GVI alone 2. List zone effective for all EWIS in description and the zone at the same NO boundaries for GVI of interval?* all EWIS in the zone
3. Define specific items/areas in the zone for which GVI at Some EWIS requires more frequent GVI at more frequent interval is justified interval and/or DET inspection
4. Define specific * If answer to box 1 is "YES," answer box 2 only and then continue the analysis on worksheet 4 in order to items/areas in the zone for which a DET Appendix H AC 25-27A determine the task interval. is justified If answer to box 1 is "NO." answer boxes 2, 3, and 4, and then continue the analysis on Worksheet 4 in order to determine the task interval.
EZAP WORKSHEET 4 05/04/10 Enhanced Zonal Analysis - Interval Determination Based on Hostility of Environment and Likelihood of Accidental Damage (step 8 of figure 1, refer to figure 2) Zone Number: Zone Description:
Likelihood of Accidental Damage Hostility of Environment Enter Number Here L 1 - Passive / 2 - Moderate / 3 - Severe Enter Number Here 1 - Passive / 2 - Moderate / 3 - Severe Ground handling equipment Temperature Foreign object debris (FOD) Vibration Weather effects (hail, rain, etc.)
Chemicals (toilet fluids, de-icing fluid, etc.)
Frequency of maintenance activities Humidity Fluid spillage Contamination Passenger Traffic Other Other Enter the Highest Number Here Enter the Highest Number Here Likelihood of Accidental Damage Interval Determination 2 3 Interval selection is specific to each task identified on worksheet 3А or 3B. For GVI of entire zone, consider overall zone environment and likelihood of damage. For stand-alone GVI or DET, consider environment and likelihood of damage 1 only in respect to the specific item/area defined for inspection.
NOTE: Interval ranges are quoted in the rating table to 2 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 (as detailed in the current MRBR). They may be expressed in terms of usage parameter (for example, flight hours or calendar time) or in terms of letter check.
The inspection frequency should be based on increasing risk Appendix H AC 25-27A of accidental damage and increasing severity of the local Upon completion, enter all task and interval selections onto environment within the zone. In other words, the more ratings identified as moderate and severe should drive the inspection towards the lower end of the interval
Enhanced Zonal Analysis - Task Summary EZAP WORKSHEET 5 05/04/10 Zone Number: Zone Description:
TASK SUMMARY Task Number Access Task Interval Task Description and Applicable Comments/Rationale/Assumptions H-7 Appendix H AC 25-27A