AD 78-24-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA330F | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Model SA 330 Helicopters |
| aircraft | Airbus Helicopters | SA330G | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Model SA 330 Helicopters |
| aircraft | Airbus Helicopters | SA330J | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Model SA 330 Helicopters |
Unsafe Condition
Failure of the main gear box input reduction gears due to excessive vibration.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the main gear box with one incorporating Puma Modification AMS 07.51.103. Alternatively, determine the acceleration spectral level using Service Bulletin No. 01.21. If the level is 52db or more, replace the gears. If less than 52db, obtain Aerospatiale's written spectral analysis approval. Repeat testing every 20 hours until gears are replaced.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
before further flight
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Affected Aircraft
Societe Nationale Industrielle Aerospatiale Model SA 330 Puma helicopters with main gear boxes under 500 hours total time in service and without Puma Modification AMS 07.51.103
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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