AD 90-23-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | AS355E | Airworthiness Directives; AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS355F | Airworthiness Directives; AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS355F1 | Airworthiness Directives; AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS355F2 | Airworthiness Directives; AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350B | Airworthiness Directives; AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350B1 | Airworthiness Directives; AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350B2 | Airworthiness Directives; AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350C | Airworthiness Directives; AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350D | Airworthiness Directives; AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 Series Helicopters |
| aircraft | Airbus Helicopters | AS350D1 | Airworthiness Directives; AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 Series Helicopters |
Unsafe Condition
Failure or malfunction of the main rotor servo controls due to icing could result in loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a protective cover on each main rotor servo control within the next 300 hours' time in service, following Aerospatiale Service Bulletin No. 67.11 or 67.14. An alternate method may be used if approved by the Manager, Rotorcraft Standards Staff.
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Compliance Time
Within the next 300 hours' time in service
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Affected Aircraft
AEROSPATIALE (SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE) Model AS 350 and AS 355 series helicopters with Dunlop main rotor servo controls, part numbers AC 64182, AC 67030, AC 66442, and AC 67034 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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