AD 2014-05-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter France | Various | Airworthiness Directives; Airbus Helicopters (Type Certificate Previously Held by Eurocopter France) (Airbus Helicopters) |
| aircraft | Airbus | Various | Airworthiness Directives; Airbus Helicopters (Type Certificate Previously Held by Eurocopter France) (Airbus Helicopters) |
Unsafe Condition
Premature failures of bearings on AS350B3 helicopters, and intensified deterioration and reported failures of bearings on helicopters modified by MOD 07 5601.
Required Actions
For Model AS350B3 helicopters with MOD 07 5601 installed, install a placard and revise the Rotorcraft Flight Manual (RFM) to limit airspeed to 100 knots IAS, check the bearings after each flight for separation, a crack, or extrusion, perform a one-time inspection of the bearings, modify the chin weight support and replace any bearings with more than 5 hours time-in-service (TIS), remove the additional chin weights and install blanks, modify the rotating pitch-change spider assembly, install a load compensator, and modify the electrical installation. For Model AS350B, AS350BA, AS350B1, AS350B2, AS350C, AS350D, AS350D1, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP helicopters, and Model AS350B3 helicopters that do not have MOD 07 5601 installed, check the bearings after the last flight of each day and replace the bearings if there is an extrusion, a crack, or separation.
Compliance Time
Before further flight
Affected Aircraft
Eurocopter France Model AS350B3 helicopters with a certain modification (MOD) installed, and Model AS350B, AS350BA, AS350B1, AS350B2, AS350C, AS350D, AS350D1, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP helicopters.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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