Refer to figure.
Performance Class 2 (PC2) operations are those operations such that, in the event of critical engine failure, performance is available to enable the helicopter to safely continue the flight, except when the failure occurs early during the take-off manoeuvre or late in the landing manoeuvre, in which case a forced landing may be required.

PC 2 can be considered as Performance Class 3 take-off or landing, and Performance Class 1 climb, cruise and descent. It comprises an all-engines-operating (AEO) obstacle clearance regime for the take-off or landing phases, and a OEI obstacle clearance regime for the climb, cruise, descent, approach and missed approach phases.

PC 2 requires AEO obstacle clearance to DPATO and OEI from then on. The take-off mass has the PC1 second segment climb performance at its basis therefore, at the point where Vy at 200 ft is reached, PC 1 is achieved.

According to CAT.POL.H.315 Take-off flight path:

• From the defined point after take-off (DPATO) or, as an alternative, no later than 200 ft above the take-off surface, with the critical engine inoperative, the requirements of CAT.POL.H.210.

According to CAT.POL.H.210 - Take-off flight path:

• From the end of the TODRH with the critical engine failure recognised at the TDP, the take off mass shall be such that the take-off flight path provides a vertical distance, above all obstacles located in the climb path, of:

1. Not less than 10.7 m (35 ft) for operations under VFR.
2. Not less than 10.7 m (35 ft) + 1% of the distance travelled (DR) under IFR from the end of TODAH above all obstacles.