SIZE CURRENT PLUG TYPES DISCONTINUED PLUG TYPES

18mm 1/2” Reach: M40J* AY4

M41E M42E, M41N, D41N, C27, C26

REM40E EM41E, EM42E, ED41N, C27S, C26S, REM39N, RED39N, RC26S

REM38E REM37N, RED37N, R25S

REM38S REM38P, REM38W

RHM40E HM41E

RHM40E RHM39N, RHD39N

RHM38E RHM37N, RHD37N

RHM38S RHM38P, RHM38W

18mm 13/16” Reach: REB37E REB37N, REA37N, R37S-1, RC35S, C35S,

REB36S REB87N, REA87N, REB36W, R819, HO14S

REB32E REB32N, REA32N, R56S, RC34S, C34S

– REB29N, REA29N, R33S

RHB37E RHB38E, RHB37N, RHA37E, RHA37N,

– RHB87N, RHA87N, R119, R115

RHB32E RHB32N, RHB33E, RHA32E, RHA32N, R111

RHB29E RHB29N, RHA29E, RHA29N, R103

RHB36S R214D, RHB36P, RHB36W

RHB32S RHB32P, RHB32W

RHB27S RHB27P

RHB27S RHB27W

18mm 1-1/8” Reach: RHU32E RHU37E

RHU27E RHU30P, RHU30W

RHU32S

14mm 3/8” Reach: REJ38 C10S4, 78S

NON-SHIELDED

UNAVAILABLE J43, AJ66

14mm 1/2” Reach: RHL27SA* HL26P/HL601P*

RHL28SA* HL31P/HL602P*

REL37B REL37W, REL38B

NON-SHIELDED

UNAVAILABLE L34R, AJ10

EL602YC EL601Y

14mm 3/4” Reach: REN30S

Current/Discontinued Aviation Spark Plugs

Champion service tools are distributed under license by Ideal Aviation, Mesa, AZ. * Racing Spark Plug Only.

Service Tools & Equipment

Over Pressurized Lube Oil Filters

Have you ever had a filter that appears to be “BLOWN UP”? Looks like a balloon or the

gasket is protruding from the base of the filter? Often the deformed filter is the only sign

that a problem existed in the lube oil system.

The first thing you want to blame is the filter. However, if the pressure was sufficient to blow

out the gasket or unroll the lockseam, the pilot may have experienced immediate and

costly problems. This should be considered a non- airworthy condition.

A look at how a lube oil system functions will show that the oil pump creates oil pressure. A

pressure-regulating valve controls the upper limit of this pressure, which is usually an integral

part of the pump.

Figure 1 is a simplified diagram of the lube oil system showing the pump, regulating valve, filter

and bearings.

The oil pump supplies sufficient flow to lubricate the bearings and other moving parts of the

engine. This oil must be under pressure if it is to properly separate the highly loaded parts of an

engine and prevent excessive wear. The purpose of the regulating valve is to provide a constant

pressure for the system.

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Bearings

Spin-On Filter

Pressure Regulating

Valve

in Open Position

Excess Oil

Pump

NORMAL PRESSURE

FIG. 1

76022_Champion_INS 8/29/06 9:47 AM Page 1

NOTES