# AD 66-29-03: Rear Spar Web

- Type: Airworthiness directive
- Status: Current
- Products: Aermacchi S.205 - 18/F, S.205 - 18/R, S.205 - 20/F, S.205 - 20/R and S.205 - 22/R
- Effective: November 23, 1966
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-313
- Registered aircraft: 24 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8CA6CBB320FBC67D86256A5500669ECE.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/66-29-03

## The airworthiness directive

66-29-03 SIAI-MARCHETTI: Amdt. 39-313 Part 39 Federal Register November 23, 1966. Applies to Model S.205 Airplanes, Serial Numbers 101 through 222, 224, 228, 229, 231 through 233.

Compliance required as indicated.

To detect cracks on the rear spar web at areas adjacent to the aileron outboard hinge bracket bolts, accomplish the following:

  (a) Within the next 10 hours' time in service after the effective date of this AD, unless already accomplished within the last 90 hours' time in service, and thereafter at intervals not to exceed 100 hours' time in service from the last inspection, visually inspect the rear spar web for cracks in accordance with Siai Service Bulletin No. 205B4, dated September 14, 1966. If cracks are detected during this inspection, comply with (b) of this AD before further flight.

  (b) Modify the rear spar by incorporating a reinforcement as set forth in paragraph (b) of Siai Service Bulletin No. 205B4, dated September 14, 1966, or an FAA-approved equivalent.

  (c) The repetitive inspections required by (a) of this AD may be discontinued after the rear spar is reinforced in accordance with (b) of this AD.

This directive effective November 23, 1966.

## 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 5 of 7 models: S.205 - 18/F, S.205 - 18/R, S.205 - 22/R, 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: 24 (24 by airframe model, 0 by engine model)
- Makers: Siai-Marchetti 24

Models with the most aircraft:

- [Siai-Marchetti S.205/22R](https://openairdocs.org/model/siai-marchetti-s-205-22r): 22 aircraft (airframe model)
- [Siai-Marchetti S.205-20F](https://openairdocs.org/model/siai-marchetti-s-205-20f): 1 aircraft (airframe model)
- [Siai-Marchetti S.205-18R](https://openairdocs.org/model/siai-marchetti-s-205-18r): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/66-29-03/models.md
Every aircraft: https://openairdocs.org/ad/66-29-03/aircraft.md

Its text cites no advisory circulars or STCs.

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