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A
737-300/400/500MAINTENANCE MANUAL
(d) If the clean-up cannot be done immediately, apply a layer of corrosion inhibiting compound or engine oil.
NOTE: This will slow the rate at which the mercury goes____ into the airplane structure.
(e) (f) Inspection, clean-up, and repair must be done before the next flight.Examine the lower lobe for mercury contamination. 1) Remove the insulation blankets in the area where the mercury has touched the airplane. a) Discard the insulation blankets. 2) Remove the insulation downstream of the area where the mercury touched the airplane.
NOTE: Remove the insulation to the nearest lateral____
fluid dams.
3) Use a 10X hand lense to visually examine the structure. a) Look for any bare metal, scratches, and/or chiped paint. 4) Any areas from step (f) 3) and any joint which might have been touched by mercury must be X-rayed.
NOTE: Droplets of mercury show on an X-ray negative____ as small white spots. Mercury corrosion and embrittlement show as tree-like forms which
penatrate the structural component.
(g) Examine the main deck for mercury contamination. 1) Examine the floor seals in the area where the mercury has touched the airplane. 2) If the floor seal appears to have been damaged or touched by the mercury, apply a small amount of water to the floor seal.
(h) a) Look to see if the water leaks through the floor seal. 3) If the floor seals show signs of damage, remove the floor panels and examine the structure below.Use a 10X hand lense to examine the seat track rails. 1) Look for bare metal, scratches, and/or chiped paint.
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A 737-300/400/500MAINTENANCE MANUAL
(i) If the mercury has touched the airplane near a frame or beam
components, examine the frame and/or beam.
NOTE:____ A device which can find mercury (mercury sniffer) is
recomended to find hidden deposits of mercury when the
area touched by mercury is large in size. If available,
x-ray equipment should be used to detect mercury.
1) Look for bare metal, scratches, and chiped paint.
(j) Any areas from step (h) or (i) and any joint which might have
been touched by mercury must be X-rayed.
NOTE:____ Droplets of mercury show on an X-ray negative as
small white spots. Mercury corrosion and embrittlement
show as tree-like forms which penatrate the structural
component.
(k) If any airplane structure shows signs of mercury contamination,
the necessary structural repair must be done.
(l) Cargo restraining equipment must be replaced if damaged by
mercury.
S 142-002
WARNING: MAKE SURE THERE IS VENTILATION WHEN THE MERCURY AREA IS
_______ CLEANED. MERCURY VAPORS CAN BE TOXIC.
IF HANDS CONTACT MERCURY, KEEP THEM AWAY FROM MOUTH. DO NOT EAT, SMOKE, OR BLOW NOSE WITHOUT WASHING HANDS CAREFULLY WITH SOAP AND HOT WATER. MERCURY IS POISONOUS.
(2) Use cardboard troughs, tape, eye dropers, or a vacuum to remove the mercury.
(a) Vacuum airplane structure which has been touched by mercury.
1) Use a trap-type glass container and a high flow vacuum cleaner to clean small areas.
NOTE: Vaporized mercury may be left in the
____ commercial vacuum cleaner. Clean the commercial vacuum cleaner after use.
2) Use a mercury vacuum cleaner to clean large areas of mercury contamination.
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