Chairman
April 17 (Reuters) - Pennpetro Energy PLC PPPP.L: PENNPETRO ENERGY PLC - APPOINTMENT OF BOARD DIRECTOR PENNPETRO ENERGY PLC - APPOINTS GRAND CHIEF RONALD M. DERRICKSON AS NON-EXECUTIVE CO-CHAIRMAN Source text: ID:nRSQ8421Aa Further company coverage: PPPP.L (((( Reuters.Briefs@thomsonreuters.com ;));))