Commonwealth legislation

AD/HS 125/89 Amdt 1 - Elevator Mass Balance Sideplate and Spigot Corrosion

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This directive requires owners/operators of British Aerospace 125 series (up to model 700) to inspect the elevator mass balance sideplate and spigot for corrosion per British Aerospace Service Bulletin 27-142 Revision 2. Corrosion can allow the sideplate to shift or detach and jam control surfaces, risking loss of control. Initial and 24‑month repeat inspection timing differs for aircraft built before 1985 versus after Dec 1984. Amendment 1 only clarifies inspection periodicity.

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/HS 125/89 Amdt 1 - Elevator Mass Balance Sideplate and Spigot Corrosion.

AD/HS 125/89 Amdt 1 - Elevator Mass Balance Sideplate and Spigot Corrosion

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
British Aerospace BAe 125 Series Aeroplanes

AD/HS 125/89

Amdt 1

Elevator Mass Balance Sideplate and Spigot Corrosion

11/88

Applicability: All models to 700 series.

Requirement: Action in accordance with British Aerospace SB 27-142 Rev 2.

Compliance: a. prior to 31 December 1987 for aircraft manufactured prior to 1985 and repeat at each C3 (24 months) inspection thereafter.

b. at the next C2 inspection after 31 December 1987 for aircraft manufactured after 31 December 1984 and repeat at each C3 inspection thereafter.

Background: Corrosion has been reported on the sideplate and spigot. This could result in displacement of the sideplate, which if not corrected could result in control surface interference. Amdt 1 clarifies the inspection periodicity.

Source text

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

1 AD/HS 125/89 Amdt 1 - Elevator Mass Balance Sideplate and Spigot Corrosion