# AD 70-20-01: Flap Locking Mechanism

- Type: Airworthiness directive
- Status: Current
- Products: Aermacchi S.205 - 22/R
- Effective: September 22, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1081
- Registered aircraft: 22 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/94AC452066CFB55A86256A5500670D98.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-20-01

## The airworthiness directive

70-20-01 SIAI-MARCHETTI: Amdt. 39-1081. Applies to Model 205-22/R airplanes.

To prevent malfunction of the flap position locking mechanism, within the next 25 hours' time in service after the effective date of this AD, unless already accomplished, replace the flap system locking pawl (P/N 205-6-052-22) and cup (P/N 205-6-052-23) with a modified locking pawl (P/N 205-6-052-22/A) and modified cup (P/N 205-6-052-23/A) in accordance with SIAI Marchetti Technical Instruction No. 205 I-13, dated 3 April 1970, or an FAA-approved equivalent.

(SIAI Marchetti Service Bulletin No. 205B25 refers to this subject).

This amendment becomes effective September 22, 1970.

## 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 1 of 7 models: S.205 - 22/R

## 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: 22 (22 by airframe model, 0 by engine model)
- Makers: Siai-Marchetti 22

Models with the most aircraft:

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

All 1 models: https://openairdocs.org/ad/70-20-01/models.md
Every aircraft: https://openairdocs.org/ad/70-20-01/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.