Fuel Shut-off Lever Modification
- Published
- Replaces
- 2021-05
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
EASA recommends that owners and operators of AS 350 B, B1, B2, B3, BA, BB, and D helicopters incorporate the fuel shut-off lever modification as described in Airbus Helicopters Service Bulletin AS350-76.00.24 Revision 1. While this recommendation is not mandatory and no airworthiness directive has been issued, timely retrofit of the modification is advised to improve safety. For further information, stakeholders should contact the EASA Safety Information Section.
Summary
EASA Safety Information Bulletin 2021-05R1 is an airworthiness bulletin addressing a modification to the fuel shut-off lever on Airbus Helicopters AS 350 series models, including AS 350 B, B1, B2, B3, BA, BB, and D helicopters. The bulletin revises the original SIB 2021-05 and provides updated guidance on a design modification to reduce the risk of inadvertent activation of the floor-mounted fuel shut-off lever. This modification aims to enhance safety following a fatal accident involving an AS 350 B2 helicopter.
What changed
EASA SIB 2021-05R1 revises the original SIB 2021-05 by incorporating Airbus Helicopters Service Bulletin AS350-76.00.24 Revision 1, which extends the fuel shut-off lever modification to all affected AS 350 legacy models with a floor-mounted lever. The modification adds a lower detent to the metallic top plate of the lever to better secure it in the stowed position and reduce the risk of accidental activation.
Why it matters
This bulletin is important for aviation professionals because it addresses a critical safety risk identified after a fatal accident caused by inadvertent fuel shut-off lever activation. Operators and maintenance organizations must be aware of the design improvement to prevent unintended engine power loss during flight. Implementing this modification enhances rotorcraft safety and reduces the likelihood of similar accidents.
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