Cheetah; Tiger; Traveler AA5 Series
Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 72; Flight Crew Total 265; Flight Crew Type 265
Aircraft Equipment Problem Critical
Aircraft Aircraft Damaged; Flight Crew Diverted; Flight Crew Landed in Emergency Condition; Flight Crew Requested ATC Assistance / Clarification; General Maintenance Action
Aircraft
Cruising 9;500 ft. MSL indicated from ZZZ direct ZZZ1 in Grumman Traveler AA5. Sudden loss of engine rpm followed by severe vibration. Emergency procedures followed and [requested priority] with ATC. Received heading from center to HSI 20 miles north north west. Could not maintain altitude but had enough partial engine power to reach HSI and circle to descend and land. Determined intake valve broke on cylinder #3 and caused power loss.
Grumman Traveler AA5 Pilot reported loss of engine power in cruise; diverted and landed.