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An airport's 100LL underground fuel storage tank was erroneously loaded with jet-a fuel which was then uploaded to reporter's be-55 so after takeoff very high cylinder head and exhaust temperatures alerted the pilot who switched to his uncontaminated aux tanks. Engine damage resulted.
| Attributes | |
| ACN | 970961 |
| Time | |
| Date | 201109 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Baron 55/Cochise |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Parked |
| Route In Use | Direct |
| Flight Plan | None |
| Component | |
| Aircraft Component | Fuel |
| Person 1 | |
| Function | Single Pilot |
| Qualification | Flight Crew Instrument Flight Crew Commercial Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 25 Flight Crew Total 4000 Flight Crew Type 1800 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
The delivery tanker operator put jet-a in the 100LL underground tank. My aircraft was fueled from the 100LL tank. The result was my tanks contained approximately 30% jet-a. On takeoff I noticed very high cylinder head temps; reduced power and climb rate to cool the engines. I also switched to my aux tanks which were not refueled at that facility and the engine temps returned to normal. The flight was completed to the destination airport. I did not realize the problem was contamination until the next morning when the airport called to report the problem. Engines were damaged due to detonation. Exhaust manifolds started to melt.
Original NASA ASRS Text
Title: An airport's 100LL underground fuel storage tank was erroneously loaded with JET-A fuel which was then uploaded to reporter's BE-55 so after takeoff very high cylinder head and exhaust temperatures alerted the pilot who switched to his uncontaminated aux tanks. Engine damage resulted.
Narrative: The delivery tanker operator put JET-A in the 100LL underground tank. My aircraft was fueled from the 100LL tank. The result was my tanks contained approximately 30% JET-A. On takeoff I noticed very high cylinder head temps; reduced power and climb rate to cool the engines. I also switched to my aux tanks which were not refueled at that facility and the engine temps returned to normal. The flight was completed to the destination airport. I did not realize the problem was contamination until the next morning when the airport called to report the problem. Engines were damaged due to detonation. Exhaust manifolds started to melt.
Data retrieved from NASA's ASRS site as of April 2012 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.