AD 83-07-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aermacchi S.p.A. | S.205 - 20/F | Airworthiness Directives; SIAI-MARCHETTI Models S205-20F and S205- 20R Airplanes |
| aircraft | Aermacchi S.p.A. | S.205 - 20/R | Airworthiness Directives; SIAI-MARCHETTI Models S205-20F and S205- 20R Airplanes |
Unsafe Condition
Loss or failure of the attachment connecting the butterfly valve to the shaft of the engine induction valve assembly.
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Required Actions
Modify the attachment of the butterfly valve (P/N 205-5-260-09) to the shaft (P/N 205-5-260-07) of the engine induction valve assembly (P/N 205-5-260-101 or P/N 205-5-260-01) per SIAI-Marchetti Service Bulletin No. 205B55. Flights to a location where this AD can be accomplished are allowed under FAR 21.197. Equivalent compliance methods require FAA approval.
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Compliance Time
within the next 100 hours time-in-service after the effective date of this AD
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Affected Aircraft
SIAI-MARCHETTI Models S205-20F and S205-20R airplanes with specified serial numbers including 222, 4-101, 4-102, 4-106, 4-172, 4-206, 4-241, 5-303, 003, 103, 106, 215, 218, 220, 221, 227, 237, 238, 345-347, 349, 351, 355, 357, 359-363, 366-368, 375-377, 4-107-4-113, 4-115, 4-116, 4-133-4-139, 4-141, 4-159-4-163, 4-173, 4-174, 4-197-4-202, 4-205, 4-208-4-215, 4-236-4-240, 4-242-4-244, 4-248, 4-249, 4-251-4-253, 4-255, 4-269-4-271, 4-273, 4-274, 4-275, 4-276, 4-282, 5-302, and 06-001-06-040.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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