United Airlines has confirmed that it has found suspicious engine parts of the London-based supplier AOG Technics, and it is the third large U.S. carrier to be publicly affected by a company-wide investigation into unapproved aircraft components. The revelation highlights the growing nature of a worldwide aviation security issue that has witnessed airlines competing to audit their supply chains and verify the integrity of their fleets.

It is reported that United discovered these dubious parts in one engine of two different planes. The parts were detected on one of the planes that were already undergoing routine maintenance. To this, a spokesperson of United replied that the two planes are undergoing replacement of the affected engines before they are put back into service and that it will keep on investigating as more information is provided by their suppliers. The airline failed to state the nature of the aircraft involved at once.

The relevant parts, which are known as seals on compressor stator vanes, are important in directing the airflow in an aircraft engine. This finding by the United Airlines is part of a row of similar findings by other large carriers, which points to a big problem in the aviation industry in terms of ensuring the authenticity of key engine parts.

European Regulators Raise the Red Lantern

The wider concern was brought to light after a warning by the European Union Aviation Safety Agency (EASA) last month that brought doubts to unapproved parts provided by AOG Technics. The investigation by EASA proposed that AOG Technics had been using fake documentation of engine parts that were of unknown origin. This was the first warning and the aviation industry started to widely examine their records to determine whether they had any business with the supplier.

Bloomberg had already written that these questionable components were mostly applied in the repair of CFM56 engines. The engines are very common, and they serve a significant percentage of the world fleet, such as a large number of Airbus A320 and Boeing 737 aircraft. The number of spare parts issued by AOG Technics to the suspects is not known, which adds to the increased level of alert in the industry.

Southwest Airlines was the first large U.S. carrier to publicly report its results concerning AOG Technics. Southwest learned about the problem in early August and immediately began taking measures to make sure that no such components were in its fleet. One of the airline representatives of the Dallas, Texas-based airline said, our suppliers have reviewed Southwest parts and found one engine that had two low-pressure turbine blades of this supplier. We decided immediately to replace those parts on that one engine immediately in an abundance of caution. This is a proactive action on a Boeing 737 NG plane, and the components were immediately substituted on September 8.

Implication on Virgin Australia and Other Airlines

Virgin Australia Airlines was not an exception as it announced on the same Monday that United announced that it was grounding two of its planes temporarily. According to Bloomberg, the airline discovered a second purported unapproved component of AOG Technics.

Virgin Australia affirmed that the affected planes were Boeing 737-800s which are usually used in domestic flights in Australia. Towards the end of last week, the airline had found a low-pressure turbine blade on one of the 737s which was replaced immediately. On the weekend, an inner high-pressure turbine nozzle of another aircraft, which was registered as VH-YFR, was also found to need replacement. One of the representatives of Virgin Australia once again emphasized that the company is highly concerned with safety and said, “At Virgin Australia, safety is our top priority and we use a very strict attitude toward maintenance to make sure that our safety level is maintained.

This problem is not confined to these initial revelations. The other airlines that have been affected currently are American Airlines, Delta Air Lines, Ryanair, Tui, and TAP. These carriers too have reported the discovery of parts that were supplied by AOG Technics in their engines. The scandal was reported to have made some airlines in the US and UK ground their planes and The Independent had earlier reported that at least 100 planes were grounded.

The CEO of Ryanair said last week that during scheduled maintenance inspections, it was found that the parts were suspect, which only highlights the prevalence of the issue. American Airlines affirmed that it had located parts of AOG on a few of its aircraft on the occasion of internal audits, and that these aircraft were immediately placed out of service.

AOG Technics and Lawsuits

The main supplier in this scandal is AOG Technics Ltd. which is a company based in London. These particular AOG components are spares that are mainly used in older generation engines of CFM International Inc., which is the CFM56 engine. Aviation authorities have claimed that AOG was aware that it was supplying spare engine parts that were supported by forged documents.

A joint venture company, CFM International, a company that manufactures the CFM56 engines, General Electric and Safran SA have come out strongly on the issue. CFM International sued AOG Technics in the UK on September 7, 2023. In a statement to Bloomberg, a spokesperson of CFM said, Safety is our number one priority and we are acting aggressively against AOG Technics to hasten the industry to detect parts being sold by this third party with forged documentation.

The lawsuit filed by CFM is in an attempt to find more documentation that would help the industry find more defective engine components. The company had first of all reported that it had used parts that contained fraudulent documentation in 68 of its powerplants across the world. Reports later indicated that 96 engines with counterfeit parts had been identified as at September 18 by authorities. On September 20, CFM also disclosed that it had sold thousands of engine parts with forged paperwork to airline companies around the world.

Matthew Reeve, a lawyer who defended CFM International and its parent companies, termed the actions of AOG Technics as a dishonest and sophisticated scheme to defraud the market with forged documents on an industrial scale. This statement underscores the magnitude of the alleged fraud and its possible consequences on the safety of aviation.

Regulatory Compliance and Safety

Although the European regulators have admitted that the parts are a matter of concern, they have observed that so far, there have been no reports of issues that are directly caused by these parts. Nevertheless, the existence of non-certified parts, no matter how immediate their effect is, is a threat to the safety and airworthiness of the aircraft in itself. The accident underscores the severe need to have the authenticity and safety of each and every component of an aircraft.

In August 2023, the maintenance organization specifically recommended that the aircraft owners, operators, maintenance organizations, and distributors check their records to make sure they are properly done. The instruction was to establish whether aircraft or engine parts were procured by AOG Technics directly or indirectly. This general warning was to put a blanket to capture and eliminate any possible danger of the unapproved components.

In August, EASA issued a statement on the problem, which explained the situation: Reports of occurrence have been received by EASA that various CFM56 engine components sold by AOG Technics have been provided with a forged Authorized Release Certificate (ARC). In both validated instances, the organisation on the ARC has certified that the form was not created internally in their organisation, and the certificate has been forged. This fact highlights the premeditated aspect of the falsification.

Regulators have said that airlines find it difficult to easily know whether their parts are genuine because of the absence of strong documentation by AOG Technics. The Federal Aviation Administration (FAA) has also recommended airlines and the aerospace industry in general to check their planes and perform audits on inventories of uncertified parts supplied by AOG. This is a concerted action of regulatory authorities to avoid the possible safety accidents.

Global Implications and Development of Investigations

CFM56 turbofan has been known to be the most popular jet engine in the world, which highlights the magnitude of the impact that the falsified documentation can have. According to Bloomberg, an aircraft that is run on a CFM56 engine takes off every two seconds across the globe. The fact that these engines are highly utilized makes their integrity the most significant issue in the safety of air travel around the world.

The investigation continued with the arrest of a person on December 6, 2011, by the Serious Fraud Office (SFO) of the UK regarding the investigation of AOG Technics. The arrested person is said to be Jose Alejandro Zamora Yrala, the founder and director of AOG Technics. The SFO also conducted raids on the home in Greater London of the suspect and confiscated the materials of interest as part of its investigation.

The SFO director Nick Ephgrave remarked on the seriousness of the case saying, The investigation concerns very serious fraudulent allegations relating to the supply of aircraft parts, the impact of which could be far-reaching. He confirmed that SFO is working to find the truth about the case as soon as possible, which shows that the authorities are taking the allegations seriously.

The current investigation and the fact that unapproved parts were found in many airlines highlights the critical weakness in the global aircraft supply chain. Although no immediate safety incidents have been associated, the industry is proactively attempting to identify and substitute all the suspected components. This group watch, as well as legal and regulatory measures, is meant to maintain the high standards of safety that passengers demand of air travel globally.