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Service Hotline

机译：服务热线

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This amendment supersedes an existing AD for the specified Robinson model helicopters that currently requires a visual inspection for skin separation along the leading edge of blade skin aft of the skin-to-spar bond line on the lower surface of each main rotor blade and in the tip cap area. The existing AD also requires a "tap test" for detecting a separation or void in both bonded areas and repainting any exposed area of the blades. If any separation or void is detected, the AD requires, before further flight, replacing the blade. Thereafter, before each flight, the existing AD also requires checking for any exposed (bare) metal along the skin-to-spar bond line on the lower surface of each blade near the tip. If any bare metal is found, that AD requires an inspection by a qualified mechanic. This amendment contains the same requirements but expands the applicability to include all serial-numbered model helicopters and limits the applicability to specific blade part numbers. This amendment also requiresa repetitive inspection of the blade and any necessary rework. The FAA has concluded that a check before the first flight of each day is sufficient for aviation safety. The actions specified by this AD are intended to provide more specific AD actions, to relieve the burdens associated with the before-each-flight check by changing it to a daily check, to detect blade skin debond, and to prevent blade failure and subsequent loss of control of the helicopter.
机译：该修正案取代了指定罗宾逊模型直升机的现有AD，该AD目前需要对每个主旋翼桨叶下表面上的蒙皮至翼梁粘结线后方的叶片蒙皮前缘进行目视检查，以检查蒙皮分离情况。端盖面积。现有的AD还需要进行“抽头测试”，以检测两个粘合区域的分离或空隙并重新喷涂叶片的任何裸露区域。如果检测到任何分离或空隙，则AD需要在进一步飞行之前更换刀片。此后，在每次飞行之前，现有的AD还需要检查沿尖端附近每个叶片下表面上的蒙皮-梁连接线的任何裸露（裸露）金属。如果发现任何裸露的金属，则该AD需要由合格的机械师进行检查。该修正案包含相同的要求，但将适用范围扩展到包括所有序列号的模型直升机，并将适用范围限制为特定的叶片部件号。该修订还要求对刀片进行重复检查并进行必要的返工。美国联邦航空局（FAA）得出结论，每天首飞之前进行检查就足以确保航空安全。该AD指定的动作旨在提供更具体的AD动作，通过将其更改为每日检查来减轻每次飞行前检查所带来的负担，检测刀片皮肤是否脱粘，并防止刀片故障和后续损失控制直升机。

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    《Light Plane Maintenance》 |2011年第10期|p.3|共1页
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