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The Hotshot Scale

Gemini Sparkle

Key Takeaways:

  • A combat pilot experienced a critical electrical failure during a Vietnam Firefly Mission due to a deviation from standard generator checks and a worn switch cover, causing the aircraft to run solely on battery power.
  • During a low-level combat patrol, the draining battery led to the loss of intercom, instrument lights, and radios, creating a dangerous and highly stressful situation.
  • The problem was resolved post-flight by correctly engaging the main generator switch, which had been prevented by the worn cover, immediately restoring all electrical functions.
  • The incident served as a significant "learning experience" about the critical importance of strictly following pre-flight procedures and ensuring equipment integrity to mitigate flight risks.
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Every military pilot who has flown in combat has experienced frightening and stressful situations. It happened to me one night in 1969, over Vietnam, but it was of my own creation. During the Firefly Missions, my unit provided two UH-1 gunships and a Huey with a bright spotlight array every night to patrol the river networks near Da Nang. We alternated with another unit all night long.

To prepare for the flights, preflight checks were carried out in daylight, so all we had to do was strap in and start the engine. The UH-1s have two generators, main and standby/backup also serving as the starter motor. During the systems check with the engine running, DC voltage is checked by rotating the VM knob to each position. Then the main gen is switched to Off and the standby gen is switched from Start to STBY. The main is switched back On and the standby gen is left in STBY as a backup.

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