RTCA DO-160 Section 22

RTCA DO-160 Section 22: Lightning Induced Transient Susceptibility

These test methods and procedures are provided to verify the capability of equipment to withstand a selection of test transients defined in this section which are intended to represent the induced effects of lightning.

The wave-forms and levels, and the pass/fail criteria for equipment performance during the test shall be listed in the applicable equipment specification.

Two groups of tests may be used for equipment qualification:

    
 	
  • The first is a damage tolerance test performed using pin injection
    • 
 	
  • The second group evaluates the functional upset tolerance of equipment when transients are applied to interconnecting cable bundles
    • 


These tests determine whether the EUT can operate as specified during and/or after various lightning induced transient waveforms are injected into connector pins, interconnecting cables, and power leads using pin injection, and/or cable bundle tests.  The pin injection method is normally used to show damage tolerance, while the cable bundle tests are normally used to show upset tolerance.

Cable bundle tests include single stroke, multiple stroke, and multiple burst, response tests (hereafter referred to as single stroke, multiple stroke and multiple burst). Cable bundle tests can also provide an indication of damage tolerance.

The equipment manufacturer must test the equipment to the test levels and waveforms consistent with its expected use and aircraft installation.

Category designation for equipment shall consist of six characters:

    
 	
  1. Pin test waveform set letter (A or B) as designated in Table 22-1.1 or Z or X
    2. 
 	
  2. Pin test level (1 to 5) as designated in Table 22-2 or Z or X
    3. 
 	
  3. Cable bundle single and multiple stroke test waveform set letter (C through K) as designated in Table 22-1.2 or Z or X
    4. 
 	
  4. Cable bundle single and multiple stroke test level (1 to 5) as designated in Table 22-3 and Table 22-4 or Z or X
    5. 
 	
  5. Cable bundle multiple burst test waveform set letter (L or M) as designated in Table 22-1.2 or Z or X
    6. 
 	
  6. Cable bundle multiple burst test level (1 to 5) as designated in Table 22-5 or Z or X
    7. 


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