Lycoming TEO-540-C1A Maintenance Manual page 106

Guidelines for Identification of Metal Particulates and Chips & Corrective Action
Metals/
Tests & Characteristics
Alloys
Chrome
Copper When placed in nitric
acid, turns bright green
Brass When placed in nitric
acid, turns bright green
Lead
Aluminum When placed in 50%
flakes solution of nitric acid and
muriatic acid
(approximately 30%
hydrochloric acid and
water), or a sodium
hydroxide solution, the
aluminum particles bubble
and fizz and form a black
residue
Magnesium
Tin Soft, malleable
Not picked up by magnet
When dropped onto a hot
(500◦F) soldering iron, tin
particle will melt and fuse
with 50/50 solder
Cadmium
Zinc
12-10
Page 76
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Table 2 (Continued)
Possible Source of
Origin on Lycoming
Engine
Piston rings
Exhaust valve stems
Platings
Oil suction screen
Pressure relief valve
spacer
Bearings
Crankcase
Accessory housing
Oil pump body
Cylinder head
Pistons
Piston pin plugs
Oil sump baffle
Turbocharger inlet
housing
Sleeve bearings
Oil sump
Tin-plated parts
Plating
Plating
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Next Step
Refer to Table 3 for
the quantity and size
of the particles
Refer to Table 3 for
the quantity and size
of the particles
Refer to Table 3 for
the quantity and size
of the particles
If lead chips, chunks,
or balls are found,
complete Corrective
Action 4 in Table 4.
Refer to Table 3 for
the quantity and size
of the particles
Refer to Table 3 for
the quantity and size
of the particles
Refer to Table 3 for
the quantity and size
of the particles
Refer to Table 3 for
the quantity and size
of the particles
Refer to Table 3 for
the quantity and size
of the particles
November 2018