Lycoming TEO-540-C1A, Руководство по обслуживанию

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TEO-540-C1A Engine Maintenance Manual
12-10 © 2018 Avco Corporation. All Rights Reserved
Page 76 November 2018
TEO-540-C1A Engine Maintenance Manual
Table 2 (Continued)
Guidelines for Identification of Metal Particulates and Chips & Corrective Action
Metals/
Alloys
Tests & Characteristics
Possible Source of
Origin on Lycoming
Engine
Next Step
Chrome Piston rings
Exhaust valve stems Refer to Table 3 for
the quantity and size
of the particles
Copper When placed in nitric
acid, turns bright green Platings Refer to Table 3 for
the quantity and size
of the particles
Brass When placed in nitric
acid, turns bright green Oil suction screen
Pressure relief valve
spacer Refer to Table 3 for
the quantity and size
of the particles
Lead Bearings If lead chips, chunks,
or balls are found,
complete Corrective
Action 4 in Table 4.
Aluminum
flakes When placed in 50%
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 Crankcase
Accessory housing
Oil pump body
Cylinder head
Pistons
Piston pin plugs
Oil sump baffle
Turbocharger inlet
housing
Sleeve bearings Refer to Table 3 for
the quantity and size
of the particles
Magnesium Oil sump Refer to Table 3 for
the quantity and size
of the particles
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 Tin-plated parts Refer to Table 3 for
the quantity and size
of the particles
Cadmium Plating Refer to Table 3 for
the quantity and size
of the particles
Zinc Plating Refer to Table 3 for
the quantity and size
of the particles