S 212-033
(14)
Examine the constant speed drive and oil cooler for ash (AMM 5-51-21/201).
S 212-034
(15)
Examine these parts of the landing gear for ash:
(a)
the exposed inner cylinders of the landing gear shocks struts
(b)
the exposed piston rods on all hydraulic actuators
(c)
all attachment points for the landing gear components
(d)
landing gear door hinges and lock mechanisms
(e)
manual release wheel well mechanisms
(f)
all cables and pulleys
(g)
landing gear brakes
(h)
landing gear selector valve and brake metering valves
(i)
proximity sensors.
S 212-035
(16) Examine the hydraulic system.
(a) Remove the air pressure filter (AMM 29-09-11/201) and look for ash. 1) If there is ash in the air pressure filter, do these steps:
a) Look for ash in a sample of hydraulic fluid (AMM 29-15-00/601). b) Remove the manual bleed/air charging valve and check for ash. c) Remove the reservoir depressurization valve and check for ash. d) Remove the reservoir pressure relief valves and check the valves for ash.
S 212-036
(17) Examine these parts of the flight controls for ash:
NOTE: The flight control include the ailerons, elevator, rudder,
____
leading edge flaps and slats, and spoilers.
(a)
all exposed mechanisms and piston rods
(b)
the control cables in unpressurized areas
(c)
the stabilizer jackscrew
(d)
flight control surface hinges
(e)
trailing edge flap tracks
(f)
flap ball screw surfaces
(g)
flap mechanisms
(h)
trailing edge flap track fairings and linkages
(i)
leading edge flap and slat mechanisms
(j)
aileron and elevator balance panels
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737-300/400/500MAINTENANCE MANUAL
S 212-037
(18)
Examine the anti-ice system (AMM 5-51-21/201).
S 212-038
(19)
If there is ash found in the passenger and control cabin, look for ash on these components:
(a)
closets
(b)
seats
(c)
crew seats
(d)
floor coverings
(e)
lavatories and components
(f)
galleys and components
(g)
refrigeration/chiller units (if installed)
(h)
baggage and cargo systems
(i)
electrical and electronic compartments
(j)
control cables and mechanisms.
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737-300/400/500MAINTENANCE MANUAL
ACID SPILLAGE CONDITION - MAINTENANCE PRACTICE
______________________________________________
(CONDITIONAL INSPECTION)
________________________
1. General_______
A. This procedure has one task.
(1) A conditional inspection for acid spillage.
B. This task has an inspection and clean up procedures for areas where acid has touched the airplane. Acid spills, unless neutralized, can rapidly corrode metallic structure.
C. The primary source of acid spillage is in the battery compoartments where acid el ectrolytes may overflow during charging or spill during battery servicing.
D. Acid-based corrosion removal compounds and airplane cleaners are used quite exten sively during routine maintenance and repair. Spills do occur at times and thoro ugh neutralizing and/or rinsing is necessary to preclude corrosion damage.
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