Table 3 Particle counts/cm3 at various phases of aircraft operation
From: Ultrafine particle levels measured on board short-haul commercial passenger jet aircraft
Flight | Max / Min Reading particle per cm3 | Phase of flight of maximum peak reading |
|---|---|---|
1 | 96,700 35 | Peak occurred with associated noticeable oil smell on ground after flight when APU air supply was selected on. Levels increased from 9,510 to 96,700 in 33 secs |
2 | 31,300 76 | Peak immediately after engine bleed air/packs selected on after climb power selected. APU was not used on the ground |
3 | 81,800 147 | Peak occurred with associated strong oil smell on ground after flight when APU air supply was selected on. Levels increased rapidly to 81,800 |
4 | 97,800 893 | Peak immediately after engine bleed air/packs selected on after climb power selected Device stopped operating mid-flight due to power failure |