CTHIn ForceLegislation
AD/STORCH/1 - Elevator Trim Tab Mass Balance
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AD/STORCH/1 - Elevator Trim Tab Mass Balance
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| AD/STORCH/1 | Elevator Trim Tab Mass Balance | 11/2006 DM |
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| Applicability: | All Slepcev SS-MK4 aircraft. |
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| Requirement: | Remove the fabric from around the elevator trim tab mass balance arm. Inspect, using dye penetrant or a microscope, the mass balance attachment to detect any signs of cracking.If any cracking is detected, the attachment of the mass balance is to be repaired by re-welding. |
| Compliance: | The initial inspection and, if necessary, repair must be performed before further flight. Subsequent inspections must be performed at 200 hourly intervals. |
| This Airworthiness Directive becomes effective on 20 September 2006. | |
| Background: | There have been two reported instances of cracking of the trim tab mass balance. In one instance the mass balance broke off after cracking progressed through the attachment weld and through the aluminium bracket. |
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Greg Vaughan
Delegate of the Civil Aviation Safety Authority
15 September 2006