747-400 AMM 飞机维护手册限制/维护检查(33)_航空信息_民用航空_通用航空

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747-400 MAINTENANCE MANUAL
(h) Use a 10X hand lens to examine the seat track rails.
1) Look for bare metal, scratches, or chipped paint.
(i) If the mercury has touched the airplane near a frame or beam
component, examine the frame or beam.
NOTE:____ A device which can find mercury (mercury sniffer) is
recommended 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 chipped 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 penetrate 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 142-006
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 AND CAN CAUSE INJURY.
(2) Use cardboard troughs, tape, eye droppers, 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.
(b) You must follow strict cleanup and inspection procedures during the first airplane service at a main base. Use a mercury vacuum cleaner, mercury sniffers and X-ray equipment. 1) Use mercury sniffers and X-ray equipment to detect any free
mercury in the airplane. 2) Make sure there is no free mercury in the airplane.
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747-400
MAINTENANCE MANUAL

(c)
If signs of mercury are in joints, between faying surfaces, or trapped in any way between structural members, the parts must be disassembled and replaced as necessary to fully remove the mercury.

(d)
Use soap and hot water at the end of the task to clean hands, clothes, and tools.

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FIRE-RESISTANT HYDRAULIC FLUID REACTION WITH TITANIUM -
_______________________________________________________ MAINTENANCE PRACTICES (CONDITIONAL INSPECTION)
______________________________________________
1. General
_______
A. One task is supplied in this procedure. The task is examine titanium parts in fire-resistant hydraulic fluid contamination areas.
TASK 05-51-12-202-001
2. Examine Titanium Parts in Fire-Resistant Hydraulic Fluid Contamination Areas
_____________________________________________________________________________
A. General
(1) This section supplies an examination of bare titanium parts which have been touched by fire-resistant hydraulic fluid (Hydraulic Fluid) which is at a temperature greater than 270 F.
NOTE: Hydraulic fluid above 270 F will cause embrittlement of
____
the titanium.