Careflight - Darwin AW139 Incident.
The NR wouldn’t have drooped as the engines would just keep producing unless an TQ LIM was activated.
Regardless of the above you know when you’ve over torqued from a bad situation. Collective would be under your armpit and you’de see the ground coming at you! The maintenance message can be interrogated when you’re on the ground by crew or engineers. It’ll tell you in plain English that you over torqued!
LZ
Regardless of the above you know when you’ve over torqued from a bad situation. Collective would be under your armpit and you’de see the ground coming at you! The maintenance message can be interrogated when you’re on the ground by crew or engineers. It’ll tell you in plain English that you over torqued!
LZ
OEI MCP 140% 2.5 minute limit 160% .....near sea level AEO more than capable of getting to 159% without any NR bleed. Certainly seen that achieved in other parts of the world too 😎
If 160% was pulled AEO, a red Inverted CAS message XSMN OVTQ should have displayed, then remained as red on black text in the CAS box. Hard to overlook.
Not sure Nr droop would be an issue, as each engine is still only supplying 80% of its rated power. This was an untidy go around AEO, not an OEI situation.
Not sure Nr droop would be an issue, as each engine is still only supplying 80% of its rated power. This was an untidy go around AEO, not an OEI situation.
Last edited by Torquetalk; 25th Apr 2020 at 15:54.
My Nr comments are based on having seen FDM footage of a botched AEO go-around that used much less power, plus other incidents on other types but, if it didn’t drool, fair enough.
I have seen the opposite phenomena a few times, where most of the available power is used irrespective of weight, followed by an aggressive rotation in which the disk becomes offloaded briefly, accelerates and causes the EECs to chase the Nr. This can cause a transient overtorque. The cause may be a CAT Rambo profile..
