Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Isolated manufacturing deviations have been reportedly found on the threads of a certain batch of fuel pressure regulators, Part Number (P/N) 887130, installed on Rotax 914 F series engines.
This condition, if not corrected, could lead to a fuel leak and in-flight fire which would necessitate an engine shut-down, possibly resulting in a forced landing, with consequent damage to the aeroplane and injury to occupants.
These affected fuel pressure regulators may have non-conforming threads in the banjo bolt fitting for the fuel return line to the fuel tank from original manufacture. These non-conforming threads could result in fuel leakage during engine operation. We are proposing this AD to prevent fuel leaks, which could result in an in-flight fire and damage to the aircraft.