AD 75-22-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA341G | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Models SA341G Helicopters |
Unsafe Condition
Main gear box (MGB) defects, including the presence of highly heated and laminated particles on the magnetic plug, bronze particles in the oil filter, or abnormal friction points/noise, which could lead to MGB failure.
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Required Actions
Before each flight, check the MGB magnetic plug for particles and inspect for abnormal friction points or noise by hand-rotating the main rotor. Every 5 hours of MGB time in service or daily, check the oil filter for foreign metallic particles. If specific particles or issues are found, replace the MGB with a serviceable part incorporating Modification AMS 07.7077 before further flight.
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Compliance Time
Before further flight if defects are found; otherwise, inspections are required before each flight and every 5 hours MGB time in service or daily, whichever comes first.
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Affected Aircraft
Societe Nationale Industrielle Aerospatiale SA341G helicopters equipped with main gear boxes P/N 341A.32.1000.01, .02, .03, or .05 with less than 25 hours time in service since new or overhauled, and not altered per AMS 07.7077.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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