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Detection Reliability Study for Interlayer Cracks
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English
Abstract
The Federal Aviation Administration Airworthiness Assurance Nondestructive Inspection Validation Center (FAA-AANC) is currently conducting a detection reliability study pertaining to the detection of cracks in multi-layered aluminum sheets. This paper describes the design, production and characterization of test specimens that are currently being used to conduct third layer Probability of Detection (PoD) experiments. Pertinent aspects of the lap splice joints for Boeing 737 aircraft, Line Numbers 292 - 2565 are included in the test specimens. A preliminary analysis of the data indicates that for some inspectors, traditional measures of performance - in particular PoD curves based on maximum likelihood fit to two-parameter lognormal curve - may be misleading.
Authors
Citation
Moore, D. and Spencer, F., "Detection Reliability Study for Interlayer Cracks," SAE Technical Paper 983125, 1998, https://doi.org/10.4271/983125.Also In
References
- Moore, D. G. et. al. Detection of Interlayer Cracks in 3rd Rivet Row - Program Plan Internal Document July 30 1997
- Moore, D. G. Hutchinson, M. C. “Effect of Conductivity Between Fasteners and Aluminum Skin on Eddy Current Specimens” 1997 ASNT Spring Conference and Sixth Annual Research Symposium Houston, Texas USA March 17 24 1997 79 81
- Boeing Commercial Jet, Nondestructive Inspection Procedure Nov. 9
- Hyatt Kechter Menton “Probability of Detection Estimation for Data Sets with Rogue Points,” Materials Evaluation November 1991 1402 1408
- Spencer, F.W. “Identifying Sources of Variation for Reliability Analysis of Field Inspections,” NATO RTO Workshop Brussels, Belgium May 1998
- • Spencer, F.W. Borgonovi, G. Roach, D. Schurman, D. Smith, R. “Reliability Assessment at Airline Inspection Facilities; Vol II: Protocol for an Eddy Current Reliability Experiment” DOT/FAA/CT-92/12 II May 1993
- • Spencer, F.W. Borgonovi, G. Roach, D. Schurman, D. Smith, R. “Reliability Assessment at Airline Inspection Facilities; Vol I: A Generic Protocol for Inspection Reliability Experiments” DOT/FAA/CT-92/12 I March 1993
- Spencer, F. W. Schurman, D. “Reliability Assessment at Airline Inspection Facilities, Vol. III. Results of An Eddy Current Reliability Experiment” DOT/FAA/CT-92/12 III May 1995