A32机身蒙皮关键区域凹坑损伤标准查询
海航技术重庆维修基地技术组-周勇
凹坑检查情况:是否有裂纹等其他损伤、附近铆钉是否有丢失或松动
凹坑距离最近铆钉的距离
凹坑的FR站位参数
最大深度0.5mm,长100mm,宽85mm;
凹坑处无裂纹等其他损伤,附近无铆钉丢失和松动情况,凹坑边缘距离铆钉的最近距离为12mm
站位FR2-FR3之间,靠近FR3
蒙皮的厚度为:1.4mm
①Dents “out of nearness/form criterion”arethose whose edge is less than 15 mm away from the nearest fastener line or anycut-out in the skin (B<15 mm (0.590 in) dent might be located at a stiffenerlocation),or whosemaximum depth is greater than 10% of the distance between the deepest point ofthe dent and the edge of the nearest internal structure (D>10% A).
②Dents"fulfilling nearness/form criterion" are those whose edge is 15 mm(0.59 in) or more away from the nearest fastener line or any cut-out in theskin (B ≥ 15 mm (0.59 in)), and whose maximum depth is ≤ 10%of the distance between the deepest point of the dent and the edge of thenearest internal structure (D ≤ 10% A).
①DO A CHECK BY A DETAILED VISUAL INSPECTION (EXTERNAL) THAT THESKIN IS FREE OF CRACKS ANDFASTENERS ARE NOT DAMAGED.
②MAX DENT DIMENSIONS PERMITTED (MAX PERMITTED DIMENSION FOR SINGLEDENT OR MAX PERMITTED DIMENSION OF DENTED AREA IN CASE OF SEVERALDENTS):
ON TITANIUM PARTS: MAX SIZE = 210 mm (8.27in)
ON ALUMINUM PARTS:
- 80% OF MINIMUM FRAME PITCH DAMAGED IN A/C LONGITUDINAL DIRECTION.
- 380 mm (14.96 in) (UNSTIFFENED AREAS) OR 2 STRINGER PITCHES IN A/C CIRCUMFERENTIAL DIRECTION WITH ONE STRINGER DAMAGED ONLY.
③CONTACT AIRBUS OR REPAIR WITHIN 5000 FC/10000 FH, WHICHEVER OCCURSFIRST