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C172 student pilot and instructor reported an exhaust stack fire occurred on engine start. Engine was shut down and referred to maintenance.
| Attributes | |
| ACN | 1517985 |
| Time | |
| Date | 201802 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Parked |
| Route In Use | None |
| Flight Plan | None |
| Component | |
| Aircraft Component | Engine |
| Person 1 | |
| Function | Instructor |
| Qualification | Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 112 Flight Crew Total 380 Flight Crew Type 340 |
| Person 2 | |
| Function | Pilot Flying Trainee |
| Qualification | Flight Crew Student |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor |
Narrative:
During engine start on a first solo flight; engine exhaust became flooded with fuel and resulted in a subsequent fire when engine began to start. Engine was shut down and no further attempt to start was made. Solo training activity was discontinued and the aircraft was reported to maintenance for inspection after the fire. Fire was contained to the exhaust stack; but the resulting flames left black residue on the lower portion of the engine cowling. Flight crew suspects the hot engine start led to a higher than normal starting mixture setting that filled the exhaust with fuel. When the engine began to start; the fuel in the exhaust system was ignited and caused the fire.
Original NASA ASRS Text
Title: C172 student pilot and instructor reported an exhaust stack fire occurred on engine start. Engine was shut down and referred to Maintenance.
Narrative: During engine start on a first solo flight; engine exhaust became flooded with fuel and resulted in a subsequent fire when engine began to start. Engine was shut down and no further attempt to start was made. Solo training activity was discontinued and the aircraft was reported to maintenance for inspection after the fire. Fire was contained to the exhaust stack; but the resulting flames left black residue on the lower portion of the engine cowling. Flight crew suspects the hot engine start led to a higher than normal starting mixture setting that filled the exhaust with fuel. When the engine began to start; the fuel in the exhaust system was ignited and caused the fire.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.