Commonwealth legislation

AD/EMB-110/43 Amdt 2 - Elevator Balance Weight Arm

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legislative instrument

Plain English Summary

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This airworthiness directive requires operators of certain Embraer EMB‑110K1/P1/P2 aeroplanes (those with a 10° stabiliser dihedral that do not have specified balance weight arm part numbers) to perform regular inspections and to replace the elevator balance weight arms. It responds to reported cracks that could lead to extreme vibration, flutter and potential loss of control.

Operators pay for inspections and replacement parts; the directive sets a recurring inspection interval and a deadline for terminating replacement, and it relies on an Embraer service bulletin and a Brazil CTA AD for the technical procedure.

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AD/EMB-110/43 Amdt 2 - Elevator Balance Weight Arm

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Embraer EMB-110 (Bandeirante) Series Aeroplanes

AD/EMB-110/43

Amdt 2

Elevator Balance Weight Arm 3/92

Applicability: Models EMB-110K1, EMB-110P1 and EMB-110-P2; equipped with 10 degrees dihedral stabilizer, but not incorporating balance weight arms P/N 110-3012-01-15 and P/N 110-3012-01-16.

Requirement: 1. Inspect in accordance with Embraer Alert Service Bulletin 110-027-0088.

Replace the elevator balance weight arms P/N 110-3012-01-01 and

P/N 110-3012-01-06 with P/N 110-3012-01-15 and P/N 110-3012-01-16 arms.

Note: Brazil CTA AD 90-05-03R1 Amdt 39-684 refers.

Compliance: 1. At intervals not exceeding 150 hours time in service.

Within 600 hours time in service after 12 January 1992. The compliance of the previous issue of this Directive was:

within the next 10 hours time in service after 23 May 1990 , and thereafter at intervals not exceeding 150 hours time in service.

Background: There have been reports of cracks in the elevator balance weight arms. This condition could result in a failure, followed by extreme vibration or flutter and loss of control of the aircraft. Amendment 1 was issued to align this Directive with a revision of the relevant country of origin AD, which requires terminating action in lieu of ongoing inspections.

Amendment 2 is issued to correct an error in the Compliance 2 calendar time.

Source text

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

1 AD/EMB-110/43 Amdt 2 - Elevator Balance Weight Arm