Corrosion Fundamentals
The electrochemical deterioration of a material or its properties due to its chemical reaction with the surrounding environment.
What is corrosion?
The most widely used method for inspecting aircraft structures for corrosion.
What is visual inspection?
Mandatory maintenance action required anytime an aircraft operates below 3,000 ft ASL over salt water.
What is a daily fresh water rinse?
The primary operational purpose of the Data Transfer Set (DTS).
What is loading and storage of mission and maintenance data?
The primary operational purpose of force generators within the AVCS architecture.
What is to counterbalance airframe vibration?
Identified as the most common type of corrosion encountered on aircraft structures.
What is uniform surface corrosion?
The primary advantages of maintaining an effective Corrosion Prevention and Control (CPC) Program.
What is minimizing damage, increasing operational efficiency, providing a safer environment, and reducing downtime?
The primary prerequisite requirement prior to the application and installation of adhesives and sealants.
What is a thoroughly cleaned area to which the material is applied?
The specific HUMS functions officially categorized as "Health Monitoring."
What are rotor track/balance, mechanical diagnostics, bearing monitoring, and engine vibration monitoring?
The two specific mechanical units that comprise Force Generator No. 2.
What are Mechanical Units No. 3 and No. 4?
Personnel required to ensure that Army policy and procedures for detection and treatment of corrosion on aviation assets are followed.
Who are leaders at all levels?
The primary purpose of conducting frequent, scheduled corrosion inspections.
What is reducing maintenance costs through early detection, identification, and treatment?
The approved material used to remove corrosion preventive compound (CPC) buildup.
What is a machinery wiping towel dampened with technical isopropyl alcohol?
The total number of bearing monitor sensors that provide analog signals to the IVHMU.
What is seven (7)?
Maximum allowable resistance when checking electrical bonding between the AVCS Electronic Unit and mounting brackets.
What is less than 2.5 milliohms?
The duty position responsible for conducting periodic training record reviews to ensure CPC training is current.
Who is the Unit Corrosion Monitor?
The mandatory distance around an involved area that must be inspected for corrosion during any maintenance action.
What is 3 feet / 36 inches (18 inches on each side)?
Maximum allowable depth of corrosion pitting on main rotor blade balance washers during a 90-day corrosion inspection.
What is 0.020 inch?
The primary function of the mechanical diagnostic sensors within the IVHMS suite.
What is monitoring vibration characteristics of bearings, gears, and shafts of each gearbox during flight?
Electrical connectors that must be disconnected when removing Mechanical Unit No. 5 on Force Generator No. 3.
What are P1187R and P1186R?
The four essential conditions necessary for metal corrosion to occur.
What are an anode, a cathode, an electrolyte, and electrical contact between them?
The required wash interval for Army aircraft operating in a Moderate Severity Zone.
What is every 45 calendar days?
The correct orientation of cotter pins installed in the left and right hinge bolt nuts on the center stabilator.
What is with the head facing up?
Key parameters supplied by the Air Data Computer (ADC) to the IVHMU.
What are pressure/baro altitude, airspeed, air temps, altitude rate, baro setting, static pressure, and acceleration?
Cockpit controls providing an alternate method to manually slew the stabilator up from a trailing edge down condition.
What are the cyclic stick slew-up switches?