Jungle Aviation and Radio Service (JAARS), the flying department of Wycliffe Bible Translators had flown thousands of hours over a 25 year span without one fatal accident before April 7, 1972. On that day, a Piper Aztec lost its right engine and crashed in Papua New Guinea, killing all seven persons aboard. The Aztec had just rolled out of the Wycliffe maintenance hangar the day before following a 100 hour inspection. The chief mechanic was stunned when he heard the news of the crash. Reviewing in his mind each step he had performed in inspecting…