aula 14 - analise msg-3 zonal

MSG-3 ZONAL MSG-3 ZONAL

The information contained herein is property of Embraer and shall not be copied or used without Embraers written consent

PURPOSE PURPOSE

The Zonal Analysis occurs after the Systems & Powerplant, L/HIRF and Structural analyses are concluded. The Zonal Analysis completes the other analyses.

CONCEPT: Comprises visual inspections, designed per zones, to check for general conditions and safety of several systems components and structural items located in the related zones.

OBJECTIVE: Evaluate some specific items, such as duct lines, wiring, other structures, etc which can contribute to a possible failure.

RESULT: Results in a series of general visual inspections (GVI) requirements and, IF NECESSARY, detailed inspections requirements (DET) or GVI stand alone.


ZONAL TASK TYPE ZONAL TASK TYPE D

ET

D

ET

AN INTENSIVE EXAMINATION OF A SPECIFIC ITEM LIGHTING IS NORMALLY SUPPLEMENTED

MAGNIFYING LENSES ARE USED

ELABORATED ACCESS

AN INTENSIVE EXAMINATION OF A SPECIFIC ITEM

LIGHTING IS NORMALLY SUPPLEMENTED

MAGNIFYING LENSES ARE USED

ELABORATED ACCESS

GV

I G

VI LOOK FOR OBVIOUS DAMAGE

MADE WITHIN TOUCHING DISTANCE

MADE UNDER NORMALLY AVAILABLE LIGHTING CONDITIONS

LOOK FOR OBVIOUS DAMAGE

MADE WITHIN TOUCHING DISTANCE

MADE UNDER NORMALLY AVAILABLE LIGHTING CONDITIONS

GV

I S

T

GV

I S

T

GVI NOT PERFORMED AS PART OF A ZONAL INSPECTION

FOR A DEDICATED ASSEMBLY OR COMPONENT

GVI NOT PERFORMED AS PART OF A ZONAL INSPECTION

FOR A DEDICATED ASSEMBLY OR COMPONENT


ZONAL ANALYSIS FLOWCHART ZONAL ANALYSIS FLOWCHART

PERFORM ENHANCED ZONAL ANALYSIS ZONE

CONTAINS

WIRING

START

IDENTIFY AIRCRAFT ZONES and

ITEM OF ANALYSIS

LIST DETAILS OF ZONE

PERFORM STANDARD ZONAL ANALYSIS

YES

NO

NO FURTHER ACTION


AIRCRAFT ZONING AIRCRAFT ZONING


ITEM OF ANALYSIS ITEM OF ANALYSIS

UNIFORM SOURCE OF

DAMAGE

EACH ZONE IS COVERED

BY JUST ONE ITEM OF

ANALYSIS




CONTAINS

WIRING

START


ITEM OF ANALYSIS



YES

NO

NO FURTHER ACTION


Zonal Analysis Zonal Analysis

Systems & Structures

Installed

Systems & Structures

Installed

Access Doors and

Panels

Access Doors and

Panels

Zonal Safety and

Maintainability

Assessment

Zonal Safety and

Maintainability

Assessment

Zone Activity Zone Activity

Transferred Tasks from

Systems & Power

Plant, Structural and

L/HIRF analysis

Transferred Tasks from

Systems & Power

Plant, Structural and

L/HIRF analysis

Aircraft Zoning Aircraft Zoning

ZONAL ANALYSIS INPUTS ZONAL ANALYSIS INPUTS


ZONAL ANALYSIS INPUTS ZONAL ANALYSIS INPUTS

Zone identification number(s)

Zone side (external/internal), including the references

Zone title

Zone boundaries

Zone illustration

Installed Equipment and Structures

Access illustrations

L/HIRF protection features

Wire bundle installation

Possible combustible materials in zone

Operational activity, also including summary of Systems & Powerplant,

Structure and L/HIRF tasks with the respective intervals, in the zone

Remarks




CONTAINS

WIRING

START


ITEM OF ANALYSIS



YES

NO

NO FURTHER ACTION


Overview of the MSG-3 Zonal Analysis

Standard Zonal Analysis Procedures

Enhanced Zonal Analysis Procedures

MSG-3 Zonal Analysis Example

CONTENTS


STANDARD ZONAL ANALYSIS

DENSITY: the density rating indicates the degree of clustering in

the zone.

IMPORTANCE: this is a measure of how important the various

components in the zone are to the safety and/or economical

operation of the aircraft.

EXPOSURE: this is a measurement of the degree to which the

zone is subjected to temperature extremes, vibration, atmospheric

exposure, and the possibility of accidental damage to systems or

structure.


STANDARD ZONAL ANALYSIS - DENSITY STANDARD ZONAL ANALYSIS - DENSITY

LOW

Bottom rear area of Cargo Compartment, CFI

bottom, CFII bottom

HIGH

CF II Bottom - Main Landing Gear Wheel Well Side

Pylon, Inlet Cowl, Fan Cowl and Aft Core

Cowl, Thrust Reverser and Engine

VERY LOW


STANDARD ZONAL ANALYSIS - IMPORTANCE STANDARD ZONAL ANALYSIS - IMPORTANCE

Wing Main Box from YA 1380 to 10241

HIGH

RAT Compartment

MODERATE

LOW

FWD Fus. Front Area FWD Partition and Floor area


STANDARD ZONAL ANALYSIS - EXPOSURE STANDARD ZONAL ANALYSIS - EXPOSURE

Fwd Fuselage near door including

Galley and Toilet areas

HIGH

Nose Landing Gear, Nose Landing Gear

Doors and Nose Landing Gear Bay

HIGH

Wing Stub

VERY LOW


PROPOSED INTERVAL OF ZONAL TASK: 12,000FH

STANDARD ZONAL ANALYSIS INTERVAL SELECTION STANDARD ZONAL ANALYSIS INTERVAL SELECTION


To be a candidate for the zonal program, these are the requirements that must be fulfilled:

System & Powerplant System & Powerplant

Type: GVI and

CAT: 6,7 or 9 and

Interval: > 6,000 FH*

Type: GVI and

CAT: 6,7 or 9 and

Interval: > 6,000 FH*

L/HIRF L/HIRF

Type : GVI and

Interval:> 6,000 FH*

Type : GVI and

Interval:> 6,000 FH*

Structures Structures

Type: GVI and

CSD = AD and

It is not an ALI and

Interval:> 6,000 FC*

Type: GVI and

CSD = AD and

It is not an ALI and

Interval:> 6,000 FC*

All candidate tasks for the zonal program are analyzed by the Zonal Working Group in order to define if the zonal program can cover these

tasks or if these tasks will be kept in the related program.

STANDARD ZONAL ANALYSIS TASK CONSOLIDATION STANDARD ZONAL ANALYSIS TASK CONSOLIDATION


TASK CONSOLIDATION - EXAMPLE TASK CONSOLIDATION - EXAMPLE

Structural WG

GVI 6,000 FC

Structural WG

GVI 6,000 FC

YES YES

Candidate tasks Candidate tasks

GVI 12,000 FH GVI 12,000 FH

ZONAL STD GVI

12,000 FH

ZONAL STD GVI

12,000 FH

GVI 6,000 FC ~

7,980 FH

GVI 6,000 FC ~

7,980 FH GVI 18,000 FH GVI 18,000 FH

Systems &

Powerplant WG

GVI 18,000 FH

Systems &

Powerplant WG

GVI 18,000 FH

GVI 6,000 FH GVI 6,000 FH

ZWG

acceptance

ZWG

acceptance YES YES

Final Result Final Result

Example 1 Example 1


Structural WG

GVI 6,000 FC

Structural WG

GVI 6,000 FC

YES YES


GVI 12,000 FH GVI 12,000 FH

ZONAL STD GVI

12,000 FH

ZONAL STD GVI

12,000 FH

GVI 18,000 FH GVI 18,000 FH

Systems &

Powerplant WG

GVI 18,000 FH

Systems &

Powerplant WG

GVI 18,000 FH

GVI 12,000 FH GVI 12,000 FH

ZWG

acceptance

ZWG

acceptance NO NO

Final Result Final Result

Example 2 Example 2

Remain in the Structural

Program

Remain in the Structural

Program

TASK CONSOLIDATION - EXAMPLE TASK CONSOLIDATION - EXAMPLE



CONTAINS

WIRING

START


ITEM OF ANALYSIS



YES

NO

NO FURTHER ACTION

ZONE CONTAINS

WIRING



Overview of the MSG-3 Zonal Analysis

Standard Zonal Analysis Procedures

Enhanced Zonal Analysis Procedures

MSG-3 Zonal Analysis Example

CONTENTS


EWIS DEFINITION EWIS DEFINITION

EWIS is not (25.1701(b))

Electrical equipment or avionics qualified to acceptable environmental conditions and testing procedures.

Portable electrical devices not part of airplane's type design.

Fiber optics.

An EWIS is (per new 25.1701(a))

Any wire, wiring device, or combination of these, including

termination devices, installed in any area of the airplane for

the purpose of transmitting electrical energy between two or

more intended termination points....


EWIS OBJECTIVE EWIS OBJECTIVE

Revises the EZAP to include specific approach for wiring

inspection. This new requirement is based on FAA AC 25-27, which

was implemented on December, 10th 2007. The European Authority

required similar analysis.

The new rule addresses the concern about the lack of proper wiring

inspections, helping the improvement of the Instructions for Continued

Airworthiness (ICA) for wiring systems.

General Visual Inspection, Detailed Inspections or other tasks to

minimize the presence of combustible materials.


EXAMPLES EXAMPLES


ENHANCED ZONAL ANALYSIS PROCEDURES ENHANCED ZONAL ANALYSIS PROCEDURES



SELECTION OF WIRING INSPECTION LEVEL AND INTERVAL

INSPECTION LEVEL DEFINITION

Zone Size Based on comparing all the zones in the aircraft: small,

medium or large.

Zone Density Degree of cluster in the zone: low, medium or high.

Potential effects of fire in the Zone Potential for loss of multiple

functions and the resulting effect on continued safe operation of the

airplane: low, medium or high.


INSPECTION LEVEL DEFINITION

PROPOSED TASKS:

ZONAL GVI + STAND ALONE GVI AND/OR DET OF SOME WIRING



SELECTION OF WIRING INSPECTION LEVEL AND INTERVAL

INTERVAL DEFINITION

Hostility of Environment: Passive, moderate or severe.

Likelihood of Accidental Damage: Passive, moderate or severe.



INTERVAL DEFINITION

PROPOSED INTERVAL



EZAP CONSOLIDATION EZAP CONSOLIDATION

EZAP

DET 18,000 FH

EZAP

DET 18,000 FH


SFAR 88 / 25.981

GVI STA 6,000 FH

SFAR 88 / 25.981

GVI STA 6,000 FH

ZONAL STD

GVI 12,000 FH

ZONAL STD

GVI 12,000 FH

Final

Result

Final

Result

EZAP

GVI 18,000 FH

EZAP

GVI 18,000 FH

ZONAL STD

GVI 12,000 FH

ZONAL STD

GVI 12,000 FH

EZAP

DET 18,000 FH

EZAP

DET 18,000 FH

ZONAL STD

GVI 12,000 FH

ZONAL SECTION

ZONAL STD

GVI 12,000 FH

ZONAL SECTION

EZAP

DET 18,000 FH

SYS SECTION

ATA 20

EZAP

DET 18,000 FH

SYS SECTION

ATA 20

SFAR 88 / 25.981

GVI STA 6,000 FH

SFAR 88 / 25.981

GVI STA 6,000 FH

SFAR 88 / 25.981

GVI STA 6,000 FH

SYS SECTION

ATA 28

SFAR 88 / 25.981

GVI STA 6,000 FH

SYS SECTION

ATA 28

aula 14 - analise msg-3 zonal

Documents

standard zonal analysis

enhanced zonal analysis

zonal inspection

zonal msg

property of embraer

specific item lighting

elaborated access gvi

aircraft zones