When Fuel Becomes a Hazard: Aviation Fuelling Errors, Fuel Contamination and Flight Safety Case Study: Max Air Boeing 737-300 Fuel Contamination Event, Yola Airport, Nigeria — 7 July 2023

Aviation fuel is a safety-critical element of aircraft operations. Its integrity must be protected from production or import through transportation, storage, filtration, quality testing and delivery into the aircraft. Fuel contamination can involve water, particulate matter, microbiological growth, cross-contamination by another fuel or product, or other substances that may render the fuel unsuitable. The safety significance of contamination is heightened by the fact that a failure may originate outside the airline while its consequences appear inside the aircraft. This book investigates the impact of aviation fuelling errors and fuel contamination using the Max Air Boeing 737-300 registration 5N-MHM event at Yola Airport on 7 July 2023 as a Nigerian case study. The NCAA reported contamination of the aircraft's main fuel tanks and an APU shutdown on the ground. The regulator subsequently took action concerning Max Air's Boeing 737 operations and initiated an organizational audit. A later NCAA communication described water found in fuel tanks of some aircraft and announced wider stakeholder collaboration to investigate the root cause and close safety gaps. [8], [9] The study adopts a qualitative documentary case-study approach. It combines regulatory evidence with international aviation fuel guidance and safety-management concepts. ICAO identifies contamination by water, particulates, microbiological growth and cross-contamination as fuel-quality concerns and describes the supply chain as extending from refining through transportation, storage, airport systems and refuelling. IATA likewise describes technical fuel operations as encompassing contamination, storage and distribution, technical standards and fuel disruptions, while its guidance covers fuel specifications, refuelling procedures, supply-chain quality and aircraft fuel systems. [1], [2], [3] The analysis demonstrates that fuelling safety should be treated as a multi-layered system rather than as a single task. The book proposes a prevention framework built around product identification, traceability, sampling, filtration, storage controls, independent verification, personnel competence, reporting, auditing, emergency response and regulatory oversight. It concludes with recommendations for airlines, airports, fuel suppliers, maintenance organizations, regulators and aviation-training institutions.