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AD/BO 105/26 - Tail Rotor - Balance Weights
Eurocopter BO 105 Series HelicoptersEurocopter BO 105 Series Helicopters
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Eurocopter BO 105 Series Helicopters
| AD/BO 105/26 | Tail Rotor - Balance Weights | 2/2009 |
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| Applicability: | Eurocopter Deutschland (ECD) GmbH Models BO 105 A, BO 105 C,BO 105 LS A-1, BO 105 D, BO 105 DS, BO 105DB, BO 105 DBS, BO 105 DB-4, BO 105 DBS-4, BO 105 DBS-5 and BO 105 S helicopters, all serial numbers. |
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| Requirement: | 1. Inspect the tail rotor balance weights and control levers in accordance with ECD BO105 Alert Service Bulletin (ASB) No. ASB BO105-30-116.2. If, during any inspection as detailed in Requirement 1 of this AD, damage is detected which exceeds the acceptable limits as specified in the ASB, replace the affected components with serviceable parts.Replacement of parts does not constitute terminating action for the repetitive inspection requirements of this AD.Note: EASA AD 2008-0206 dated 25 November 2008 refers. |
| Compliance: | For Requirement 1 - Within the next 2 months or 100 flight hours (FH), whichever occurs first after the effective date of this AD, and thereafter at intervals not to exceed 600 FH (+ 60 FH) or 48 months (+ 6 months), whichever occurs first.For Requirement 2 - Before further flight. |
| This Airworthiness Directive becomes effective on 12 February 2009. | |
| Background: | During a periodical inspection, corrosion was detected on the tail rotor balance weights in the area of the attachment thread. This condition, if not detected and corrected, could lead to failure of the threads, possibly resulting in separation of tail rotor parts, subsequent severe tail rotor vibration and consequent loss of control of the helicopter. |
| For the reasons described above, this AD requires repetitive visual inspections of the tail rotor balance weights and control levers to identify any damage and the replacement of damaged components. |
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James Coyne
Delegate of the Civil Aviation Safety Authority
22 December 2008