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Nondestructive Testing and Flaw Detection Procedures and Practices

1-1. Purpose. This volume provides general information pertaining to nondestructive testing and flaw detection 
procedures and practices. Specific aircraft application, usage, and substitution is found in the individual aircraft 
maintenance manual. This volume is maximum benefit to the mechanic who desires general information about 
nondestructive testing and flaw detecting procedures and practices. Refer to TM 55-1500-335-23 for general application 
of various nondestructive inspection methods. This volume should not be used to perform nondestructive inspection 
procedures. This volume is not requisitioning authority, and applicable repair parts and special tools list should be 
consulted to obtain the unit of issue and National Stock Number of the items required for maintenance. 
1-2. Scope. General information to guide aircraft maintenance personnel is covered in this volume; however, no 
attempt has been made to include special parts or equipment which are applicable only to individual or special aircraft. 
General information is covered in Penetrant inspections are discussed in Cha ter 3 and magnetic particle 
inspections in[Cfiäö.iéEÄ] Information regarding radiography is presented in h t r 
h t r covers ultrasonic 
inspections. Finally, electromagnetic inspections are presented 
for consumable materials in this volume. 
1-3. Consumable Materials. Refe TM 1-1

2-1. General. The field of Nondestructive Inspection (NDI), testing, and flaw detection is varied and complex. 
It cannot be covered in detail in this volume. This chapter will provide a brief description of the various, methods 
available, shop and personnel requirements, and an explanation of special terms. The effectiveness of a particular 
method of testing and inspection depends upon the skill, experience, and training of the mechanic doing the test. 
Additionally, each method is limited in its usefulness as an inspection tool by its adaptability to the component being 
tested. 
2-2. General Shop Rules. The practices and procedures described in this chapter pertain to the repair functions of 
aviation activities and are applicable to all levels of maintenance Because of the many types of Army aircraft, each shop 
within the manufacturing and repair section must, of necessity, have personnel trained in general practices and 
procedures to the extent that different type and model aircraft do not upset a smooth running shop.