If I'm not mistaken it only acts at higher flaps settings. To my untrained eye it seems they never got this far.
Depends on the tabulation number:
YF121 - YF460, YK176, YK177, YK661 - YR401
When the flaps are set at 40, the TE flaps:
• retract to 30 if airspeed exceeds 163 knots
• re–extend when airspeed is reduced below 158 knots.
When the flaps are set at 30, the TE flaps:
• retract to 25 if the airspeed exceeds 176 knots
• re–extend when airspeed is reduced below 171 knots.
When the flaps are set at 25, the TE flaps:
• retract to 15 if the airspeed exceeds 191 knots
• re–extend when airspeed is reduced below 186 knots.
When the flaps are set at 15, the TE flaps:
• retract to 10 if the airspeed exceeds 201 knots
• re–extend when airspeed is reduced below 196 knots.
When the flaps are set at 10, the TE flaps:
• retract to 5 if the airspeed exceeds 211 knots
• re–extend when airspeed is reduced below 206 knots.