# Proposed AD FAA-2005-20439: AeroSpace Technologies of Australia Pty Ltd. Models N22B, N22S, and N24A Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-10-24
- Products: Aerospace Technologies of Australia
- Product type: Appliance
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 16, 2005, 70 FR 12819
- Comments due: April 15, 2005
- Became: [AD 2005-10-24](https://openairdocs.org/ad/2005-10-24)
- Docket: FAA-2005-20439 (https://www.regulations.gov/docket/FAA-2005-20439, where comments are filed)
- Project: 2005-CE-04-AD
- FR document: 05-5153
- Official PDF: https://openairdocs.org/files/sha256/44/6c/446c39c44ee10d589cb0903205ed5140553f5990dce87b348c93d8e050af7519 (from https://www.govinfo.gov/content/pkg/FR-2005-03-16/pdf/05-5153.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/03/16/05-5153/airworthiness-directives-aerospace-technologies-of-australia-pty-ltd-models-n22b-n22s-and-n24a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0D13B569910147E386256FC6005D8CF0.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20439

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2003-14-20, which applies to all AeroSpace Technologies of Australia Pty Ltd. (ASTA) Models N22B and N24A airplanes. AD 2003-14-20 requires you to repetitively inspect, using either dye penetrant or magnetic particle methods, the rudder control lever shafts for cracks; inspect (one-time) all lever shaft side plates by measuring the thickness; and if cracks or discrepancies in thickness are found, replace unserviceable parts with new or serviceable parts. Since AD 2003-14-20 was issued, we determined that the AD should also affect Model N22S airplanes. The manufacturer has also revised the service information to include a rudder control lever shaft part number (P/N) that was not part of AD 2003-14-20. Consequently, this proposed AD would require the actions of AD 2003-14-20, add Model N22S airplanes to the applicability, and add rudder control lever shaft P/N 1/N-45-1102 to the inspection requirements. We are issuing this proposed AD to detect and correct cracks in the rudder control lever torque shafts and discrepancies in the thickness of the lever shaft side plates, which could result in failure of the rudder control lever torque shaft. Such failure could lead to reduced controllability of the airplane.

## Notices in this docket

- Mar 16, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-5153, comments due Apr 15, 2005 (https://www.federalregister.gov/documents/2005/03/16/05-5153/airworthiness-directives-aerospace-technologies-of-australia-pty-ltd-models-n22b-n22s-and-n24a)

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