GM9 CAT.OP.MPA.110 Aerodrome operating minima

• ED Decision 2022/012/R found in: Air Operations (965/2012) Part-ARO Part-ORO Part-CAT Part-SPA Part-NCC Part-NCO Part-SPO (Sep 2023)

GM9 CAT.OP.MPA.110 Aerodrome operating minima ED Decision 2022/012/R AERODROME OPERATING MINIMA — HELICOPTERS High vertical speeds should be avoided due to unstable aerodynamics and potential transient autorotation state of the main rotor. Vertical speeds at or below 800 ft/min should be considered to be normal, and vertical speeds above 1 000 ft/min should be considered to be high. The vertical speed on final approach increases with the descent angle and the ground speed (GS), including tailwinds. Whereas the helicopter should be manoeuvred into the wind during the visual segment of an instrument approach, tailwinds may be encountered during the instrument segments of the approach. If the vertical speed is above 1 000 ft/min, a go-around should be considered. Greater vertical speeds may be used based on the available data in the rotorcraft flight manual. Table 21 below gives an indication of the vertical speed based on the descent angles and ground speed. Table 21 Examples of vertical speeds <table border="1" cellpadding="0" cellspacing="0" width="100%"><tr><td valign="top" width="33%"><p align="center">Ground speed</p></td><td valign="top" width="33%"><p align="center">Descent angle</p></td><td valign="top" width="33%"><p align="center">Vertical speed</p></td></tr><tr><td valign="top" width="33%"><p><b>80 kt</b></p></td><td valign="top" width="33%"><p>5.7° (10 %)</p></td><td valign="top" width="33%"><p>800 ft/min</p></td></tr><tr><td valign="top" width="33%"><p><b>100 kt</b></p></td><td valign="top" width="33%"><p>5.7° (10 %)</p></td><td valign="top" width="33%"><p>1 000 ft/min</p></td></tr><tr><td valign="top" width="33%"><p><b>80 kt</b></p></td><td valign="top" width="33%"><p>7.5° (13.2 %)</p></td><td valign="top" width="33%"><p>1 050 ft/min</p></td></tr><tr><td valign="top" width="33%"><p><b>100 kt</b></p></td><td valign="top" width="33%"><p>7.5° (13.2 %)</p></td><td valign="top" width="33%"><p>1 300 ft/min</p></td></tr></table> *Note: A GS of 80 kt may be the result of an indicated airspeed (IAS) of 60 kt and a tailwind component of 20 kt.* GM9 CAT.OP.MPA.110 Aerodrome operating minima ED Decision 2022/012/R AERODROME OPERATING MINIMA — HELICOPTERS High vertical speeds should be avoided due to unstable aerodynamics and potential transient autorotation state of the main rotor. Vertical speeds at or below 800 ft/min should be considered to be normal, and vertical speeds above 1 000 ft/min should be considered to be high. The vertical speed on final approach increases with the descent angle and the ground speed (GS), including tailwinds. Whereas the helicopter should be manoeuvred into the wind during the visual segment of an instrument approach, tailwinds may be encountered during the instrument segments of the approach. If the vertical speed is above 1 000 ft/min, a go-around should be considered. Greater vertical speeds may be used based on the available data in the rotorcraft flight manual. Table 21 below gives an indication of the vertical speed based on the descent angles and ground speed. Table 21 Examples of vertical speeds <table border="1" cellpadding="0" cellspacing="0" width="100%"><tr><td valign="top" width="33%"><p align="center">Ground speed</p></td><td valign="top" width="33%"><p align="center">Descent angle</p></td><td valign="top" width="33%"><p align="center">Vertical speed</p></td></tr><tr><td valign="top" width="33%"><p><b>80 kt</b></p></td><td valign="top" width="33%"><p>5.7° (10 %)</p></td><td valign="top" width="33%"><p>800 ft/min</p></td></tr><tr><td valign="top" width="33%"><p><b>100 kt</b></p></td><td valign="top" width="33%"><p>5.7° (10 %)</p></td><td valign="top" width="33%"><p>1 000 ft/min</p></td></tr><tr><td valign="top" width="33%"><p><b>80 kt</b></p></td><td valign="top" width="33%"><p>7.5° (13.2 %)</p></td><td valign="top" width="33%"><p>1 050 ft/min</p></td></tr><tr><td valign="top" width="33%"><p><b>100 kt</b></p></td><td valign="top" width="33%"><p>7.5° (13.2 %)</p></td><td valign="top" width="33%"><p>1 300 ft/min</p></td></tr></table> *Note: A GS of 80 kt may be the result of an indicated airspeed (IAS) of 60 kt and a tailwind component of 20 kt.* ##### GM9 CAT.OP.MPA.110 Aerodrome operating minima *ED Decision 2022/012/R* **AERODROME OPERATING MINIMA — HELICOPTERS** High vertical speeds should be avoided due to unstable aerodynamics and potential transient autorotation state of the main rotor. Vertical speeds at or below 800 ft/min should be considered to be normal, and vertical speeds above 1 000 ft/min should be considered to be high. The vertical speed on final approach increases with the descent angle and the ground speed (GS), including tailwinds. Whereas the helicopter should be manoeuvred into the wind during the visual segment of an instrument approach, tailwinds may be encountered during the instrument segments of the approach. If the vertical speed is above 1 000 ft/min, a go-around should be considered. Greater vertical speeds may be used based on the available data in the rotorcraft flight manual. Table 21 below gives an indication of the vertical speed based on the descent angles and ground speed. ***Table 21*** ***Examples of vertical speeds*** <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="center"> <b>Ground speed</b></p> </td> <td bgcolor="#808080"><p align="center"> <b>Descent angle</b></p> </td> <td bgcolor="#808080"><p align="center"> <b>Vertical speed</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#808080"><p align="center"> <b>80 kt</b></p> </td> <td bgcolor="#d9d9d9"><p align="center"> 5.7° (10 %)</p> </td> <td bgcolor="#d9d9d9"><p align="center"> 800 ft/min</p> </td> </tr> <tr valign="top"> <td bgcolor="#808080"><p align="center"> <b>100 kt</b></p> </td> <td bgcolor="#d9d9d9"><p align="center"> 5.7° (10 %)</p> </td> <td bgcolor="#d9d9d9"><p align="center"> 1 000 ft/min</p> </td> </tr> <tr valign="top"> <td bgcolor="#808080"><p align="center"> <b>80 kt</b></p> </td> <td bgcolor="#d9d9d9"><p align="center"> 7.5° (13.2 %)</p> </td> <td bgcolor="#d9d9d9"><p align="center"> 1 050 ft/min</p> </td> </tr> <tr valign="top"> <td bgcolor="#808080"><p align="center"> <b>100 kt</b></p> </td> <td bgcolor="#d9d9d9"><p align="center"> 7.5° (13.2 %)</p> </td> <td bgcolor="#d9d9d9"><p align="center"> 1 300 ft/min</p> </td> </tr> </table> *Note: A GS of 80 kt may be the result of an indicated airspeed (IAS) of 60 kt and a tailwind component of 20 kt.*