AA.II.B.R1FAA-S-ACS-11A · Nov 2023Risk management

Malfunctions during powerplant start.

ACS element text (the applicant demonstrates understanding of)

Malfunctions during powerplant start.

Bottom line

When the EGT exceeds the safe limit of an aircraft, it experiences a “hot start.” This is caused by too much fuel entering the combustion chamber or insufficient turbine rpm. Serious engine damage occurs if the hot start is allowed to continue. If the engine fails to accelerate to the proper speed after ignition or does not accelerate to idle rpm, a hung or false start has occurred.

FAA references

  1. AFH ch. 15 (p. 15-12) — FAA-H-8083-3C
  2. PHAK ch. 7 (p. 7-23) — FAA-H-8083-25C (2023)
  3. AFH ch. 1 (p. 1-15) — FAA-H-8083-3C
  4. PHAK ch. 7 (p. 7-18) — FAA-H-8083-25C (2023)
  5. RMH ch. 3 (p. 3-4) — FAA-H-8083-2A
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