AD 2008-21-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Eurocopter France Model AS332 C, L, L1 and L2 Helicopters |
Unsafe Condition
Incorrect position of the liner of the compensating piston in hydraulic pumps, due to non-compliant repair processes, causes seal deterioration and hydraulic fluid leaks from the pump casing. This can lead to the loss of RH and LH hydraulic power systems during flight if both pumps leak substantially, or the loss of the affected hydraulic system if only one pump leaks substantially.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 15 hours time-in-service, determine the part number and serial number of installed hydraulic pumps. If both pumps have serial numbers listed in paragraph 1.A.1 of the ASB, replace at least one pump with an airworthy pump with a different serial number or one containing the letter 'V'. Within 12 months, replace all remaining pumps with serial numbers listed in paragraph 1.A.1 of the ASB.
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Compliance Time
Within 15 hours time-in-service for initial inspection and replacement of at least one pump, and within 12 months for replacement of all remaining pumps.
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Affected Aircraft
Eurocopter France Model AS332 C, L, L1, and L2 helicopters with Messier-Bugatti hydraulic pumps, part numbers C24160-X, C24160-XXX, C241600XX, C241600XX-X, and C241600XX-XXX, with serial numbers without the suffix letter 'V', as listed in paragraph 1.A.1 of Eurocopter France Emergency Alert Service Bulletin 01.00.73.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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