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AD/BEA 121/27 Amdt 3 - Control Column Handgrip Fitting
de Havilland Support Beagle B.121 (Pup) de Havilland Support Beagle B.121 (Pup) Series Aeroplanes
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de Havilland Support Beagle B.121 (Pup) Series Aeroplanes
| AD/BEA 121/27 Amdt 3 | Control Column Handgrip Fitting | 17/2016 |
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| Applicability: | All models of de Havilland Support Beagle B.121 (Pup) Series aeroplane. |
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| Requirement: | Action in accordance with Mandatory Beagle Pup service bulletin (SB) B121/95 Revision 4 issued 8 July 1996. |
| Compliance: | As specified in the Requirement Document. |
| This AD commences on 29 August 2016. | |
| Background: | Cases have been reported of fractures of the handgrips (Part No. BE45-10283) fitted to the control columns of bulldog aircraft. These handgrips are identical to those fitted to Pup aircraft. Failures may be more likely on aircraft operating in climates susceptible to high levels of ultraviolet radiation.AD/BEA 121/27 Amendment 1 was raised in response to two recent occurrences of in‑flight failure of the control column handgrips during aerobatics. The failed handgrips had no evidence of surface cracking. This AD introduces revised inspection procedures to ensure that the handgrips are airworthy.Further testing has established that non destructive inspection is not adequate to detect degradation of strength. AD/BEA 121/27 Amendment 2 lifed the handgrips at five years.AD/BEA 121/27 Amendment 3 is issued to incorporate Beagle Pup SB B121/95 Revision 4. Revision 4 provides two options to the registered operator of the aircraft, namely; option 1 requires replacement of the handgrips at intervals of 5 years if the aircraft and the handgrips are not covered when not in use. Option 2 requires replacement of the handgrips at intervals of 10 years if the aircraft and the handgrips are kept covered when not in use. |
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Pieter van Dijk
Delegate of the Civil Aviation Safety Authority
8 August 2016