Engine Fuel & Control — Fuel Filter Pre-blockage Pressure Switch — Operational Check
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of ARRIEL 2B, 2B1, 2B1A, 2C, 2C1, 2C2, 2S1, and 2S2 engines must perform daily visual inspections of the fuel filter by-pass indicator during pre-flight checks starting from 08 August 2019. Additionally, an operational check of the fuel filter pre-blockage pressure switch must be completed within 300 operating hours or six months from the effective date. Any failed parts must be replaced before the next flight.
Summary
EASA Airworthiness Directive 2019-0180 is an airworthiness directive addressing SAFRAN Helicopter Engines ARRIEL 2 series engines installed on various helicopters including Airbus Helicopters AS 350 B3, EC 130 B4, AS 365 N3, EC 155 B, and Sikorsky S-76C. The directive mandates operational checks and visual inspections of the fuel filter pre-blockage pressure switch to ensure proper functionality and prevent uncommanded engine shutdowns due to fuel contamination.
What changed
This new airworthiness directive introduces mandatory daily visual checks of the fuel filter by-pass indicator pop-up and a one-time operational check of the fuel filter pre-blockage pressure switch for affected ARRIEL 2 engines. It also requires replacement of any non-conforming parts found during these inspections, which serves as a terminating action for the repetitive checks.
Why it matters
This directive is critical for aviation professionals because it addresses a safety risk where faulty fuel filter pressure switches may fail to activate, potentially causing uncommanded engine shutdowns. Compliance ensures continued airworthiness, reduces the risk of in-flight engine failures, and helps operators maintain regulatory compliance and flight safety.
More for Safran ARRIEL 2
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- EASA AD 2025-0079Time Limits / Maintenance Checks — Airworthiness Limitations Section — AmendmentApr 10, 2025
- EASA AD 2022-0261Fire Protection — Fire Detectors — ReplacementDec 20, 2022
- EASA SIB 2019-10R1Power Turbine Over-Speed Protection on ARRIEL 2D and ARRIEL 2B1 EnginesSep 21, 2022
- EASA AD 2017-0102R2
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