Standard IGNITER, SPARK, AERONAUTICAL ENGINE (LOW TENSION) 1991-05-01 CURRENT AS803 This specification establishes the qualification and acceptance limits for aeronautical engine low tension spark igniters.
Standard SPARK PLUGS, AIRCRAFT ENGINE - 18 MM 1942-03-01 HISTORICAL AS28 This standard covers two basic types of spark plugs as follows:
Standard SPARK PLUGS, AIRCRAFT ENGINE 1961-12-15 HISTORICAL AS28A This specification covers aircraft reciprocating engine shielded and unshielded spark plugs.
Standard SPARK PLUGS, AIRCRAFT ENGINE 1992-11-01 CURRENT AS28B This specification covers reciprocating engine shielded and unshielded spark plugs.