LNI 3C2014Inevstigation Report for No 1 Finding

Investigation Report for CAD Finding No.1General: There are 9 blend-out repair points on the LH fuselage skin panels from pitot probes to static ports. HKA has conduct the survey to confirm these repairs are in compliance with the Reduced Vertical Seperation Minima (RVSM) as required in SRM 53-00-11 PB101 Para 4 as well as compliance to SRM repair requirements. Angle of Attack ProbeRepair Locations:81234567992.5”36.5”Figure 1. Repair Locations 57.5” Blend-out Repair Points Static Ports AreaPitot ProbesAerodynamic Requirements for Static Ports AreaAccording to SRM 53-00-11 PB101 Para 4.B(3): As indicated above, the Static Ports Area is defined in Figure 105(See Figure next sheet). According to the Figure 105, the maximum affected range is R4 (1000mm, 39.37 inches) starting from the center of static port. During the physical survey, HKA measured the distance from point 9 aft edge to the FWD corner markings around the static port, and the measured distance is 57.5 inches (See Figure 1). That is, the distance from the center of static port center to the repair point is much more than 57.5 inches. Therefore, the repair points are NOT within the RVSM critical area as mentioned in SRM related to the static ports. Figure 105 from SRM 53-00-11 PB101 Para 4Maximum Affected Range R4 (1000mm, 39.37 inches)Aerodynamic Requirements for Angle of Attack ProbeAccording to SRM 53-00-11 PB101 Para 4.C(3): As indicated above, the Angle of Attack Probe affected area is defined in Figure 107(See Figure next sheet). According to the Figure 107, the maximum affected range is R9 (250mm, 9.843 inches) starting from the center of AOA probe.During the physical survey, HKA measured the distance from the nearest repair point 5 upper edge to the center of AOA probe, and the measured distance is 92.5 inches (See Figure 1). Therefore, the repair points are NOT within the RVSM critical area as mentioned in SRM related to the AOA probe. The maximum affected range is R9 (250mm, 9.843 inches)Figure 107 from SRM 53-00-11 PB101 Para 4Aerodynamic Requirements for Pitot Probes: According to SRM 53-00-11 PB101 Para 4.D(3):As indicated above, the Pitot Probe affected area is defined in Figure 108(See Figure next sheet). According to the Figure 108, the maximum affected aftward range is R10 (100mm, 3.937 inches) starting from the center of pitot probe. During the physical survey, HKA measured the distance from point 1 fwd edge to the pitot probe aft edge, and the measured distance is 36.5 inches (See Figure 1). Therefore, the repair points are NOT within the RVSM critical area as mentioned in SRM related to the pitot probes.The maximum aftward affected range is R10 (100mm, 3.937 inches)Figure 108 from SRM 53-00-11 PB101 Para 4Rework Points List 9See next sheet for PT 776584321 Note: Above figures and data derived from A330 SRM Ch 53-11-11 and Ch 53-21-11 identification sections 7Note: Above figures and data derived from A330 SRM Ch 53-21-11 identification sections PTOriginal THKNRCRework DepthRework DimensionsSRM Allowable LimitCategoryResult12.5mm (0.098 inches)1770.49 mm 27mm X 25mm SRM 53-11-11 PB101 Para 4A and Diagram 102 Limit = 3500 FC CBDD 016 raised for repair at 3C 21780.36 mm25mm X 23mmCBDD 015 raised for repair at 3C31790.38 mm30mm X 23mmCBDD 014 raised for repair at 3C41800.51 mm27mm X 24mmCBDD 008 raised for repair at 3C52.2mm (0.087 inches)1810.03 mm25mm X 23mmSRM 53-21-11 PB101 Para 3B and Diagram 102BT: 2500FC, I: 1700FC, GVI 61820.04 mm27mm X 24mmBT: 2500FC, I: 1700FC, GVI71830.27mm20mm X 15mmSRM 53-21-11 PB101 Para 3B and Diagram 101BT: 2500FC, I: 1700FC, GVI81840.04mm25mm X 10mmSRM 53-21-11 PB101 Para 3B and Diagram 102BT: 2500FC, I: 1700FC, GVI91.6mm (0.063 inches)185 0.07mm13mm X 8mmBT: 2500FC, I: 1700FC, GVINotes: For PT 5-9, refer to IIR 53-21-11-1-001-00 SSI 53.21.01 (A330-200) for inspection requirement. Conclusion: According to the survey and checking the SRM requirements for RVSM requirements, the blend-out repair points as shown in the Figure 1 are not within the RVSM critical areas. And the aerodynamic requirements are in compliance with the Reduced Vertical Sepe