David Clark Spring Assembly H6740-07 | OEM 40623G-61 Aviation Radio Adapter 23 dB Noise Reduction Rating

23 dB Noise Reduction Rating (NRR) for hearing protection

ceramics wood

and airman test report codes for remedial study

PN:  GLM-220-AMA | AMACD MLR

David Clark Spring Assembly H6740-07 | OEM 40623G-61 Aviation Radio Adapter 23 dB Noise Reduction RatingDavid Clark Spring Assembly, H6740 07 OEM 40623G 61 OEM spring assembly from David Clark designed to restore mechanical integrity and spring function in H6740 07 headset systems. Part number 40623G 61. Genuine OEM Replacement: Manufactured by David Clark to meet original headset specifications. Fits H6740 07 Systems: Ensures compatibility with specific headset assemblies using this model. Restores Critical Tension: Maintains internal spring pressure