Commonwealth legislation

AD/B737/105 - Rudder Trim Switch

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This directive mandates replacing the aileron/rudder trim control module on Boeing 737-300/-400/-500 aeroplanes identified in Boeing Service Bulletin 737-27A1198, following that Service Bulletin’s procedures. It’s intended to stop reported unwanted rudder trim motion after switch release. Affected operators (owners, lessees, maintenance orgs) must install the replacement by 22 May 1999, bear the parts and maintenance costs, and comply with the FAA/CASA-referenced technical instructions.

JSON API

Deep dive

Want the full deep dive?

Zoe can write the in-depth analysis on top of the summary above: how it works, who it affects and what each part actually does.

Current sections

Direct links to the current provisions in AD/B737/105 - Rudder Trim Switch.

AD/B737/105 - Rudder Trim Switch

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
Boeing 737 Series Aeroplanes

AD/B737/105 Rudder Trim Switch 6/97

Applicability: All Boeing Model 737 -300, -400, -500 aeroplanes identified in Boeing Service

Bulletin 737-27A1198 dated 6 June 1996.

Requirement: Unless previously incorporated, replace the Aileron/Rudder trim control module in accordance with Service Bulletin 737-27A1198.

Note: FAA AD 97-06-09 Amdt 39-9966 refers.

Compliance: Prior to 22 May 1999.

This Airworthiness Directive becomes effective on the 22 May 1997.

Background: Operators have reported unwanted rudder trim motion occurring with the rudder trim actuator after the pilot had adjusted the trim and released the trim switch. This AD mandates the replacement of the module to provide a more reliable module and switch to help prevent the identified condition.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/B737/105 - Rudder Trim Switch