Include in the ATR FCOM change of TLU STBY from HI SPD mode to the LO SPD mode
Implemented
Aviation L
Accident
30.10.2013
L2012-08/S2
Suosituksen perustelu
As regards a TLU fault the FCOM states the following: “DISREGARD TLU FAULT ALERT”. This can only be done when the green TLU light turns on after the manual switch has been set to the LO SPD mode. When manually controlling the TLU it takes 33 ± 5 seconds for the mode to change and the indicator light to turn on.
Recommendation
Safety Investigation Authority, Finland recommends that the manufacturer of the ATR aircraft include in the FCOM the length of time it takes for the TLU’s standby system to change from the HI SPD mode to the LO SPD mode.
Toimenpide-ehdotukset
As regards a TLU fault the FCOM states the following: “DISREGARD TLU FAULT ALERT”. This can only be done when the green TLU light turns on after the manual switch has been set to the LO SPD mode. When manually controlling the TLU it takes 33 ± 5 seconds for the mode to change and the indicator light to turn on.