# AD 83-07-10: Butterfly Valve Attachment

- Type: Airworthiness directive
- Status: Current
- Products: Aermacchi S.205 - 20/F and S.205 - 20/R
- Effective: April 14, 1983
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-4613
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A89B760D19838F67862569AF00766FAA.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/83-07-10

## The airworthiness directive

83-07-10 SIAI-MARCHETTI: Amendment 39-4613. Applies to Models S205-20F and S205- 20R (Serial Numbers 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 thru 347, 349, 351, 355, 357, 359 thru 363, 366 thru 368, 375 thru 377, 4-107 thru 4-113, 4-115, 4-116, 4-133 thru 4-139, 4-141, 4-159 thru 4-163, 4-173, 4- 174, 4-197 thru 4-202, 4-205, 4-208 thru 4-215, 4-236 thru 4-240, 4-242 thru 4-244, 4-248, 4- 249, 4-251 thru 4-253, 4-255, 4-269 thru 4-271, 4-273, 4-274, 4-275, 4-276, 4-282, 5-302, and 06-001 thru 06-040) airplanes certificated in any category.

Compliance: Required as indicated unless already accomplished.

To prevent loss or failure of the attachment that connects the butterfly valve to the shaft of the engine induction valve assembly, within the next 100 hours time-in-service after the effective date of this AD, accomplish the following:

a) Modify the attachment of the butterfly valve (Part Number (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) in accordance with the "Instruction" section of SIAI-Marchetti Service Bulletin No. 205B55, dated December 11, 1981.

b) Airplane may be flown in accordance with FAR 21.197 to a location where this Airworthiness Directive (AD) can be accomplished.

c) An equivalent method of compliance with this AD if used must be approved by the Manager, Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, 1000 Brussels, Belgium.

This amendment becomes effective on April 14, 1983.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A9EU](https://openairdocs.org/tcds/A9EU): Aermacchi S.p.A.; names 2 of 7 models: S.205 - 20/R, S.205 - 20/F

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 1 (1 by airframe model, 0 by engine model)
- Makers: Siai-Marchetti 1

Models with the most aircraft:

- [Siai-Marchetti S.205-20F](https://openairdocs.org/model/siai-marchetti-s-205-20f): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/83-07-10/models.md
Every aircraft: https://openairdocs.org/ad/83-07-10/aircraft.md

Its text cites no advisory circulars or STCs.

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