Commonwealth legislation

AD/EMB-110/5 Amdt 4 - Flight Control Trim System Bearings

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Commonwealth

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legislative instrument

Plain English Summary

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Requires operators of all Embraer EMB‑110 aeroplanes to inspect—and then, within a set period, modify—flight‑control trim‑tab rod bearings. Mechanically it mandates periodic disconnect-and-visual inspections until operators complete an Embraer service‑bulletin modification, which then ends the inspection requirement; the mod must occur within 1500 flight hours or eight months from 3 February 1992. The measure responds to an inflight failure attributed to bearing jamming and substitutes a one‑off modification for ongoing repetitive checks.

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AD/EMB-110/5 Amdt 4 - Flight Control Trim System Bearings

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-110/5

Amdt 4

Flight Control Trim System Bearings 2/92

Applicability: All EMB-110 series.

Requirement: 1. Disconnect and visually inspect the bearings at the following locations for jamming:

At the tube terminals of the elevator, rudder and aileron trim tab control systems.

b. At the aileron trim tab bellcrank and actuator eyelets.

Note 1: EMBRAER SB No 110-27-036 R2 refers.

Note 2: Brazilian AD 82-06-01 R8 refers.

Note 3: Compliance with AD/EMB-110/36 terminates the inspection requirement on the elevator trim rods and reverts the inspection interval to that prescribed in the Maintenance Planning Guide.

Note 4: Modification of the aileron and rudder trim tab rod bearings in accordance with EMBRAER SB No 110-27-060 R2 terminates that inspection requirement.

Action in accordance with Embraer Service Bulletin No. 110-27-060 R2. Compliance: 1. At intervals not to exceed 250 hours time in service, until compliance with

Requirement 2.

Within 1500 hours time in service or 8 months after 3 February 1992; whichever occurs first. The compliance of the previous issue of this Directive was: at intervals not exceeding 250 hours time in service after 28 February 1982 until the relevant modifications are carried out. This amendment is effective from 3 February 1992.

Background: An inflight failure of the terminal of the control rod in an elevator trim tab has been attributed to jamming of the trim tab bearing assembly.

Amendment 4 is issued in response to a recently issued Country of Origin Directive which requires modification action in lieu of ongoing repetitive inspections.

Source text

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

1 AD/EMB-110/5 Amdt 4 - Flight Control Trim System Bearings