AP-29 (Mn. Turbine Malf)

Question 1

AP-29

Above what turbine speed could breaking vacuum cause damage?

Answer 1

200 RPM

Question 2

AP-29 (Mn. Turb Malf)

What are the turbine trip criteria per FOP?

When would you trip Rx instead?

What are the non-FOP turbine trip criteria?

Answer 2

P _{brng oil} < 8 psig

T _{exh hood} > 250 F for 15 min

Vibs brng > 14 mils

T_brng metal > 225 F

Diff exp exceeds danger values…..

Greater than P-9

Loss return oil flow

T _{brng oil return} > 180 F