Engine — Fuel Nozzle — Replacement
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must replace affected fuel nozzles before they exceed 7,000 flight hours since first installation or within 300 flight hours after 27 January 2020, whichever is later. Installation of affected parts is only allowed if they are serviceable under the new criteria and must be replaced within the specified limits. Compliance with PowerJet Service Bulletin 73-0023 is required for all replacement actions.
Summary
EASA Airworthiness Directive 2020-0006 is an official regulatory document addressing the replacement of fuel nozzles on SaM146 engines, specifically models SaM146-1S17, SaM146-1S17C, SaM146-1S18, and SaM146-1S18C. These engines are commonly installed on Sukhoi RRJ-95B aircraft. The directive mandates the removal and replacement of certain fuel nozzles identified by part numbers 365-144-303-0 and 365-144-503-0 due to wear issues.
What changed
This new Airworthiness Directive introduces mandatory replacement requirements for fuel nozzles on affected SaM146 engines to address excessive wear found in service. It establishes new limits on the flight hours for affected parts and prohibits installation of fuel nozzles that exceed these limits. The directive also references PowerJet Service Bulletin 73-0023 for detailed replacement procedures.
Why it matters
This directive is critical for aviation professionals because worn fuel nozzles can increase leakage between the nozzle and combustion chamber, potentially causing engine restart failures after flame out. Compliance ensures continued airworthiness and safety of aircraft equipped with SaM146 engines, preventing possible in-flight engine control issues. Operators, maintenance organizations, and compliance teams must monitor and replace affected parts to avoid regulatory violations and safety risks.
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