Update, 3.10pm: A light plane pilot escaped serious harm after his engine failed at 2500 feet and he was forced to crash land about 45km south-east of Perth this morning.

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Picture: Tim Cohen/Seven News

Update, 3.10pm: A light plane pilot escaped serious harm after his engine failed at 2500 feet and he was forced to crash land about 45km south-east of Perth this morning.

The RAC rescue helicopter was called to the scene of the crash near the Serpentine Dam just after 9.30am.

The pilot crashed the single-engine Jabiru plane on the edge of the dam at about 9.15am.

The pilot was taken by helicopter to Jandakot airport but he did not require treatment by waiting St Johns ambulance officers.

The undercarriage of the small plane was badly damaged and is was not clear if it will be salvageable.

Police officers were onsite this afternoon to secure the scene of the crash, a police spokeswoman said.

WA-based Gavin Thobaven from Recreational Aviation Australia, the regulatory body for light aircraft in Australia, said a review would be undertaken to try to ascertain why the plane’s engine failed, but a full investigation was usually only launched if someone was fatally injured.

Picture: RAC Rescue Helicopter