AD 2021-11-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada Limited | Airworthiness Directives; Bell Textron Canada Limited Helicopters |
| aircraft | Bell | Textron Canada Limited | Airworthiness Directives; Bell Textron Canada Limited Helicopters |
Unsafe Condition
A blocked float supply hose installed on an EFS could result in partial inflation of an EFS float during an emergency landing on water, preventing a timely egress from the helicopter, and injury to helicopter occupants.
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Required Actions
Inspecting each EFS supply hose to verify that there is no blockage through the float supply hoses, and depending on the results of those inspections, removing from service certain parts and replacing those parts with airworthy parts.
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Compliance Time
Within 100 hours time-in-service (TIS)
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Affected Aircraft
Bell Textron Canada Limited (Bell) Model 429 helicopters, with a Bell Emergency Flotation System (EFS) kit part number (P/N) 429-706-069-101/-103/-105/-121/-123/-125/-139/-141/-143/or -157 manufactured before July 2019, with a float supply hose manufactured before January 2014, installed, except for float supply hoses marked with ``SB 025-69-21'' above the external identification marking.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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