ta190-gcr32002r0刹车毂磨损指示销检查

1、编码：F-EPM-19-01TJA MED航空公司维修工程部TECHNICAL ADVISORY技术通告PAGE页码OF总页/14本 TA 发送至：HNAT(TJ):各维修/过夜GCR:工程部各中心/分部/飞行部 运行控制部 海航技术各题目：刹车毂磨损指示销检查标准SUBJECT：Criterion Of Inspecting Brake Assembly Wearing Indicator Pins分类/CAT.：CAD使用和信息和放行标准信息其它信息ADOperation/Maenance nformationMaenance/DispatchStandardPart Informatio

2、nOthers内容：DESCRIPTION：本通告适用机型 Aircraft M:190本通告适用飞机 Applicability:ALL参考资料 References:AMM32-49-11原因 Reason of Revi:由于系统升级，下发本 TA 替代 TA190-32-002R7 版。/Due to the system upgrade, ie thiso supersede TA190-32-002R7.以前相关通告处理 Relation of TAs revis:本版生效的同时，TA190-32-002R7 版。Abolish TA190-32-002R7 after this

3、TA getso effectivity.正文/Content：一、刹车毂磨损情况检查标准 1、准备工作：1) 操作停留刹车手柄设置停留刹车，确认刹车毂活塞都正常移动；注：为消除指示销与刹车盘之间的间隙，测量时应将向外侧推指示销，使指示销与刹车盘保持接触。 2、检查标准：航后工作中刹车毂磨损的检查标准：指示销伸出长度不小于0.5 mm;其他情况下检查标准为：指示销伸出长度大于0 mm。注：参见图 1:指示销2 wear pin；支架表面3 bracket通告TA NO.版次REVI生效日期EFFECT DATE编写PREPARED审核REVIEWED批准APPROVEDTA190-GCR32-

4、00202016-09-20PAGE页码2/4题目：刹车毂磨损指示销检查标准SUBJECT：Criterion Of Inspecting Brake Assembly Wearing Indicator PinsFigure 1/图 1二、刹车毂磨损指示销弯折情况检查标准若指示销因刹车毂压力盘键槽磨损而偏指，参见下图 2，测量相应刹车毂压力盘宽键槽宽度：若任一宽键槽宽度大于 37.0mm，必须在不超过 30FC 之内完成更换。注意：件号为90002340-4PR 的刹车毂已解决键槽磨损失效，因此无需执行此步骤。Figure 2/图 2 2.对于刹车毂磨损指示销弯曲情况，标准如下：注：此处弯曲

5、为指示销长度方向产生一定弧度弯曲，主要原因为在刹车毂磨损接近到限时，因刹车时压力盘偏转使得指示销脱离支架孔，刹车时指示销受到支架挤压而发生弯曲。若同一刹车毂仅一个指示销存在弯曲情况，需拆除指示销，按MEL 32-49-11放行飞机。PAGE页码3/4题目：刹车毂磨损指示销检查标准SUBJECT：Criterion Of Inspecting Brake Assembly Wearing Indicator Pins2)若同一刹车毂两个指示存在轴向弯曲情况，需更换相应刹车毂,否则飞机不可放行。Criterion for brake assembly wearing checkingPrepara

6、tionMake suret the emergency/parking brake handle is set and do a visual check to make suret all thstons of the brake assembly are moved freely.Note: To eliminate the clearance betn the indicator and the brake plate, push the indicator and make it touch the brake plate.Inspection standardAF inspecti

7、on standard: the length of the indicator (L) is no lessn 0.5mm;Other condition: the length of the indicator (L) is moren 0 mm. NOTE: Refer to Figure 1.2-wear pin;3-bracket.Criterion for brake assembly wear pin bent or leaning checkingIf the wear pin is leaning due to prere plate slots wearing,measur

8、e both wide slots ofthe pre re plate.If one of the wide slot width is over 37.0mm, replace the brake assembly in 30 FC ASAP.NOTE： The pre re plate slot wearing problem has been solved on brake ASSY PN: 90002340-4PR and no need to inspect the slot.For wear pin bent condition,make the judgement as bel

9、ow:NOTE: This bent condition means obvious radian at wear pin axial direction.The root cause is t, with the brake assembly near the wearing limit th n esc s from the bracket due to pre re plate deflexion and shove with the bracket when release the brake.If only ear pin is bent on the brake assembly, remove the wear pin and release the aircraft as per MEL 32-49-11.If both wear pin are bent on the brake a