T9074-AS-GIB-010/271 Rev 1
CHENG’S INTENT
NAVSEA Technical Publication T9074-AS-GIB-010/271, Requirements for Nondestructive Testing Methods, was last revised in 1999 with issuance of Advanced Change Notice 1 (dated 16 February 1999) and covers the requirements for conducting nondestructive testing (NDT) used in determining the presence of discontinuities in metals. It also contains the minimum requirements necessary to qualify NDT personnel, procedures, and equipment. The NAVSEA Chief Engineer’s (CHENG’s) intent for the changes in Revision 1 is to reduce nondestructive testing and evaluation (NDT&E) costs without reducing quality or capability. Examples such as the allowance of local approvals at Regional Maintenance Centers (RMCs), allowing delegation of some NDT Examiner duties to allow work flexibility, addition of Selenium-75 as a gamma radiation source option that potentially reduces radiation boundary footprints, and usage of computed radiography (CR) to evaluate pipe wall erosion/corrosion through lagging are expected to meet the Commander’ s affordability expectations. Several changes, such as deleting the use of direct current (DC) yokes for magnetic particle testing (MT) and requiring local NDT Examiners to approve light-emitting diode (LED) lighting sources are known performance improvements the Shipyards have agreed to implement. The use of the latest, affordable tools and methods for NDT&E is encouraged, and implementation of Revision 1 is expected to be an overall improvement in NDT&E affordability. Should you find this intent is not being realized upon use of this revision, please contact the NDT&E Technical Warrant Holder, Dr. Kirsten Green (SEA 05P2) at (301) 227-5074, for resolution. Errors, omissions, discrepancies, and suggestions for improvement to Revision 1 shall also be submitted as a Technical Manual Deficiency/Evaluation Report (TMDER). The NAVSEA/SPAWAR Technical Manual Deficiency/Evaluation Report form, NAVSEA 4160/1 is included at the back of this document.
L. B. FULLER Rear Admiral, USN NAVSEA CHENG
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