Corrosion Control in Aircraft Fuel Tanks Prevents Costly Repairs
Proper maintenance is critical to preventing aircraft fuel leaks, particularly when inspecting for corrosion. Repairs are often expensive and time-consuming, aircraft on the ground for much longer than if a proper maintenance routine was followed. To ensure that an aircraft remains airworthy, it is important to first understand what causes corrosion and what are the most effective means of controlling it.
Fuel contamination causes corrosion in aircraft fuel tanks. Bacteria are the main cause of fuel contamination and typically come from already contaminated fuel or the inability to keep fuel tanks properly aspirated and inspected. Fuel contamination occurs when standing water at the bottom of the sump, or contaminated fuel, harbors organisms that live in petroleum products. These organisms, called cladosporium resine and pseudomonas aeroginosa, live in water and feed on hydrocarbons in fuel. The waste products of these organisms create water, sludge and acids which eventually cause corrosion.
Controlling corrosion in aircraft fuel tanks begins with proper maintenance. There are no products that can completely prevent the growth of this bacterium; therefore, ensuring that a proper maintenance routine is performed is the only way to keep corrosion under control. Fortunately, there are several products that minimize bacteria and using them alongside a good maintenance routine will help prevent costly repairs.
If corrosion is found in the fuel system, the first step is to thoroughly inspect the entire fuel system. Damage assessment is necessary to determine the extent and subsequent steps required, such as repairing aircraft fuel leaks. To prepare, document corrosion damage first. Rework of corroded areas requires multiple passes, so it is important to document all areas that appear corrosion first.
Rework involves cleaning and removing all finish from corroded areas, removing corrosion products, and restoring the surface protective film. After rework, corrosion damage repair will include the removal of all corrosion and corrosion products. If the damage is severe and exceeds the manufacturer’s established damage limits, the part must be replaced.
Corrosion removal is a long and detailed process that involves sandblasting and joining the reworked areas with the surrounding surfaces. Continuous cleaning with polishes and brighteners will provide corrosion control in aircraft fuel tanks in the future. แอพพลิเคชั่นเว็บพนัน
Repair of aircraft fuel leaks
Corrosion can compromise the fuel tank, causing leaks and other significant problems. A fuel leak can ground an aircraft for days or even weeks, as time-consuming repairs are done. In fact, repairing aircraft fuel leaks is one of the most time-consuming repairs. Transitions occur over days, rather than hours, and require thorough analysis to ensure proper leak repair.
The first step is to carry out a thorough inspection. During this phase, it is crucial to answer several questions, including:
When does the leak appear?
Does it only leak when the tank is full?
Does the leak stop when the tank is only half full?
Are you constantly losing?
Where is the leak visible on the plane?
Does the leak only come from a rivet?
Next, confirm the type of fuel system on your aircraft. The manufacturer’s service manual provides important information about the fuel tank system. There are three types of primary fuel tanks: integral or “wet wing”, fuel cell, and metal or fiberglass embedded within the wing. Each requires specific steps to make proper repairs.