Clarifying Letter

OIL FILTER DEBRIS COLLECTION,

CLARIFYING INFORMATION

While the instructions, in the MORE Company PT6A Instructions For Continued Airworthiness, for collecting oil filter debris are entirely adequate, experience has shown that additional clarifying information will be helpful.

Proper Use of the Filter Funnel Assembly

The Filter Funnel Assembly is included in the oil analysis and oil filter rinsing kit. The kit part number is GA-001-OFRK-MORE. The Filter Funnel Assembly is a clear filter funnel top and blue base for holding the filter paper and backup pad.

The Filter Funnel Assembly is preloaded with filtration media that consists of two (2) distinct and important layers. The bottom layer is a thicker filter back up pad. The top layer is a thinner piece of 8-micron nitrocellulose filter paper. The filter backup pad supports the filter paper and helps seal the clear upper funnel to its blue base.

It is critical that BOTH filter layers are in place before using the Filter Funnel Assembly, AND that the filter paper is on top of the filter back up pad. Whenever the Filter Funnel Assembly is used you must make absolutely sure that the filter back up pad AND the filter paper are in place in the blue base of the assembly.

If you need to use an additional piece of filter paper in accordance with the MORE Instructions For Continued Airworthiness, or any time that you use any Filter Funnel Assembly, be sure that you insert both layers, the filter paper on top of the filter back up pad, into the blue base of the assembly.

From MORE Instruction Manual Step Number 28

“… A second clear plastic petri dish with a piece of filter paper and a filter backup pad is included in each oil analysis and oil filter rinsing kit. Open this clear plastic petri dish and, using your flat tipped forceps, carefully pick up the filter backup pad and the filter paper and place them onto the blue base of the filter funnel assembly. Be sure the thinner filter paper is on top of the thicker backup pad. Snap the clear funnel top back onto the blue base. Now repeat steps 17-24.”

From MORE Instruction Manual Step Number 14

“14. The filter funnel assembly is pre-loaded with a piece of filter paper and one filter backup pad. The thinner filter paper must always be on top of the thicker backup pad. (See photo 7). There is an empty clear plastic petri dish enclosed in each oil analysis and oil filter rinsing kit to store this pre-loaded filter paper and backup pad after you use them. (See photo 8). A second additional piece of filter paper and filter backup pad are enclosed in the oil analysis and oil filter rinsing kit in another clear plastic petri dish. The filter backup pad supports the filter paper and helps seal the clear upper funnel to its blue base. A small label is enclosed with each Petri dish. These labels are used to label, seal, and tape the Petri dishes closed.”

From MORE Instruction Manual Step Number 32

32. Additional filters and back up pads can be purchased from MORE Company Inc. An extra set is provided in each oil analysis and oil filter rinsing kit. It is important to keep extra filters on hand. They would be used if: a filter and back up pad was contaminated (i.e. dropped on the floor). Your oil filter is extremely dirty and more filters are needed.”

We recommend that persons and facilities performing oil filter debris collection have a supply of extra filters on hand in order to avoid situations requiring a “work around method” when an additional filter is needed and not immediately available.

Oil Filter Rinsing Solvent

The solvent used to rinse the oil filter MUST be clean, virgin, and free from contaminants.

During the analysis by Aviation Laboratories, they are looking for very small traces of foreign material from the engine oil filter. For this reason it is absolutely necessary to use CLEAN, NEW solvent in order to avoid contamination of the oil filter debris, resulting in an erroneous report from Aviation Laboratories.

You should consider using one of the following rinsing solvents: 140 solvent, mineral spirits, charcoal lighter, or kerosene.

The solvent must be clean, virgin, and free from contaminants. You should not use a solvent with a flash point less than 140 degrees Fahrenheit. Do not use light solvents such as xylene or toluene as they may react with the plastic parts in this apparatus. Do not use leaded gasoline. Do not use any type of chlorinated solvents such as perchloroethane or trichloroethane. The use of aviation gasoline or automotive gasoline is not recommended, because of the flammability factor and because these gasolines contain additives that can contaminate the oil filter debris. The use of alcohols are not recommended because of the flammability factor.

Jet A contains a mixture of kerosene and benzene related compounds (aromatic hydrocarbons). It is necessary to minimize skin contact with these benzene related compounds (or mixtures containing these benzene related compounds) because they can be toxic and can be absorbed through the skin.

For additional information please contact, MORE Company Inc. Tel: 775 782 3346, FAX: 775 782 3349, e-mail: info@morecompany.net

MORE Company has been assisted in the preparation of this information pamphlet by Mr. Rory Hammond, President, Aviation Laboratories.

February 6, 2007

Ralph Hawkins

Chief Engineer

MORE Company Inc.