| Precondition: |
- Aircraft on ground - APU on - both packs on - Recirculation fan on - all gaspers(cockpit) on -Cockpit door closed |
| Sound meter settings: |
- switch A to "500 - 1KHz - range switch to "LO" -response switch "SLOW" |
| sound meter position for test |
|
| max sound level | 75 dB(A) +/- 5 dB(A). |
| CRJ700/705/900/1000-SL-21-029 | |