# Presentation: 538107

## Contamination 

- Daniel Slaton
- Boeing Commercial Airplanes
- Material & Process Technology
- December, 2006

## Topics:

**Topics:**
-  Contamination Testing –
- 	Flammability Testing of Cleaners and CIC’s
-  Maintenance Review Board Report
- 	Overview of inspection and cleaning requirements during 	maintenance
-  Contamination Roadmap – Ray Cherry

## Flammability of Cleaners and Corrosion Inhibiting Compound on Insulation Blankets

|                 Cleaning Agents |  |  |  |
| --- | --- | --- | --- |
| Acetone | Aliphatic Naphtha | Isopropyl Alcohol | Citra-Safe |

| Corrosion Inhibiting Compounds |  |  |
| --- | --- | --- |
| AV8 | AV30 | Socopar 65 |

**In-Work**

## Flammability of Cleaners

|   |   |  | Cleaning Agent |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
|   |   | Test  | Uncoated | Acetone | Aliphatic Naphtha | Isopropyl Alcohol | Citra-Safe |
|  | PET | Q-Tip | P | F | P | P | F |
|  | MPVF | Rad.Pan. | P | P | P | P | P |
|  | PEKK | Rad.Pan. | P | F | P | P | F |
|  | PVF | Rad.Pan. | P | P |   |   |   |

## Flammability Testing Results and Next Steps

- Naphtha and IPA appear to be benign. Further review with film manufactures is required, as well as airline maintenance groups to determine acceptability at the airplane level.
- Complete CIC testing.
- Develop test matrix for other contaminates such as hydraulic fluids, etc...

## Maintenance Review Board (MRB) Report

- OVERVIEW

**Document Purpose:**
- The Maintenance Review Board Report (MRBR) is model specific:
- 1) Defines the initial minimum scheduled maintenance/inspection requirements to be 	used in the development of an approved continuous airworthiness maintenance 	program.
- 2) Basis from which each operator may develop their own Continuous Airworthiness 	Maintenance Program.
- 3) Forms part of the instructions considered essential for proper maintenance as 	required by FAR 25.1529 and FAR 25 Appendix H (Instructions for Continued 	Airworthiness).
- The Maintenance Review Board Report is developed from review & analysis of the industry proposal developed by the Industry Steering Committee representing airline operators, FAA, and OEM.
- Derived through the MSG-3 process (Maintenance Steering Group).

## Maintenance Review Board Report

- Inspection Intervals

- A-Check: The Systems/Zonal A-Check Interval is 500 flight hours.
- 	1A Tasks (500 flight hours)
- 	2A Tasks (1,000 flight hours)
- 	3A Tasks (1,500 flight hours), and so on.
- C-Check: The Systems/Zonal C-Check Interval is 6,000 flight hours or 18 mo.
- 	1C Tasks (6,000 flight hours/18 months)
- 	2C Tasks (12,000 flight hours/36 months)
- 	3C Tasks (18,000 flight hours/54 months), and
- 	4C Tasks (24,000 flight hours/72 months).

## Maintenance Review Board Report

**Systems Requirements **
- 	Tasks are defined through the MSG-3 Revision 2005.1 Enhanced Zonal Analysis Procedure (EZAP). These tasks (Restoration, Detailed Inspection and General Visual Inspection) are considered applicable and effective to ...
- 		1) minimize wiring contamination
-   		2) detect wiring installation discrepancies which may not be reliably
-      		    detected through a zonal inspection.
-   		3) included under ATA Chapter 20 (Standard Practices).

## Maintenance Review Board Report

- Standard Practices

|   |   |   | APPLICABILITY |  |   |
| --- | --- | --- | --- | --- | --- |
| MRB ITEM NUMBER | TASK | INTERVAL | APL | ENG | ZONAL INSPECTION REQUIREMENT |
| 20-005 | RS | 4C | ALL | ALL | CLEAN THE MAIN EQUIPMENT CENTER (EZAP) |
| 20-006 | GV | 4C | ALL | ALL | GENERAL VISULA INSPECTION OF POWERR FEEDERS AND EWIS IN BACK OF THE EE TRAYS (EZAP) |
| 20-007 | RS | 4C | ALL | ALL | CLEAN THE AREA BEHIND THE SIDEWALL - LEFT HAND,ZONE 121 (EZAP) |
| 20-008 | RS | 4C | ALL | ALL | CLEAN THE AREA BEHIND THE EQUIPMENT RACKS AND SIDEWALL,ZONE 122 (EZAP) |
| 20-009 | RS | 4C | ALL | ALL | CLEAN THE AREAS BELOW THE FORWARD CARGO COMPARTMENT FLOOR (EZAP) |
| 20-017 | DI | 4C | ALL | ALL | INSPECT (DETAILED) THE EXPOSED EWIS BUNDLES IN THE AREA BELOW THE AFT CARGO COMPARTMENT (EZAP |
| 20-018 | RS | 4C | ALL | ALL | CLEAN THE AREA BELOW THE AFT CARRGO COMPARTMENT FLOOR (EZAP) |
| 20-026 | RS | 4C | ALL | ALL | CLEAN THE AREAS UNDER THE RACEWAY COVER PLATES ON BOTH SIDES OF THE FLIGHT COMPARTMENT AND TAREA BEHIND P13, P6 RUDDER PEDALS AND CENTER CONSOLE (EZAP) |

- Example

## Maintenance Review Board Report

- Zonal Inspection Requirements

-  Zonal Inspection Requirements assures that all systems/components/installations and structure contained in a zone receive adequate inspection to determine security of installation and general condition.
-  Zones which contain systems/components/installations are assigned zonal general visual inspection tasks to be performed at specified intervals.
-  An enhanced zonal analysis was performed for zones containing electrical wiring and having a potential for combustible materials being present. This enhanced zonal analysis provides a means to identify applicable and effective tasks to minimize contamination and to address wiring installation discrepancies that may not be reliably detected through a standard zonal inspection.
-  All Zonal inspection requirements constitute Electrical Wiring Interconnection System (EWIS) Instructions for Continued Airworthiness (ICA).
-  The term EWIS means any wire, wiring device, or combination of these, including termination devices, installed in the airplane for transmitting electrical energy between two or more termination points.

## Maintenance Review Board Report

- Maintenance Zones

**100 Fuselage - Lower Half **
**200 Fuselage - Upper Half**
- 300 Empennage
- 400 Powerplants and Struts

- 500 Wing - Left
- 600 Wing - Right
- 700 Landing Gear and Gear Doors
- 800 Doors (Passenger/Cargo)

## Maintenance Review Board Report

- Zonal Inspection

|   |   | APPLICABILITY |  |   |   |
| --- | --- | --- | --- | --- | --- |
| MRB ITEM NUMBER | INTERVAL | APL | ENG | ZONE | ZONAL INSPECTION REQUIREMENT |
| 0600-119-01Z | 1C | ALL | ALL | 119 | *** MAIN EQUIPMENT CENTER; PERFORM INTERNAL GENERAL VISUAL INSPECTION OF ZONES. ACCESS NOTE: REMOVAL OF INSULATION AND EQUIPMENT NOT REQURIED. |
| 0600-200-01Z | 1C | ALL | ALL | 200 | *** CONTROL CABIN; PERFORM INTERNAL GENERAL VISUAL INSPECTION OF ZONES. |

- Example

## Contamination Roadmap

- See Ray Cherry Presentation
- http://www.fire.tc.faa.gov/pdf/materials/Dec06Meeting/Cherry-1206-routemap.pdf