Mooney M20J 201 — Maintenance Manual

This document is an Aircraft Accident Report concerning the Mooney M20J 201, registration N321KL, which experienced a loss of engine power shortly after takeoff. The report details the circumstances leading to the accident, including pre-flight inspections and maintenance history. It highlights the importance of thorough fuel system checks and the potential hazards of water contamination in fuel tanks. The report serves as a reminder for pilots and maintenance personnel to ensure proper fuel tank management and adherence to safety protocols to prevent similar incidents in the future.

• The Mooney M20J 201 experienced a loss of engine power shortly after takeoff due to fuel contamination.
• A loose-fitting fuel tank cap allowed water to enter the left fuel tank, leading to the incident.
• The pilot found water in the left fuel tank during pre-flight but deemed it clear after further checks.
• Post-accident, approximately 500 ml of water was found in the left fuel tank and throughout the fuel system.
• Proper fitting of fuel caps and thorough pre-flight inspections are critical to prevent similar accidents.