Standard IGNITER, SPARK, AERONAUTICAL ENGINE (HIGH TENSION) 1962-11-01 HISTORICAL AS692 This specification establishes the qualification and acceptance limits for aeronautical engine high tension spark igniters.
Standard LEADS, SHIELDED, DETACHABLE SPARK PLUG 1956-03-15 HISTORICAL ARP489 This specification establishes the requirements for shielded, detachable high tension spark plug leads for reciprocating engines.
Standard SPARK PLUGS, AIRCRAFT ENGINE - 18 MM 1942-03-01 HISTORICAL AS28 This standard covers two basic types of spark plugs as follows: