ASN Wikibase Occurrence # 228924
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Wednesday 11 September 2019 |
| Time: | 09:32 LT |
| Type: |  Piper PA-28-201T Turbo Dakota |
| Owner/operator: | Private |
| Registration: | N2890T |
| MSN: | 28-7921088 |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 4058 hours |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Boca Raton Public Airport (BCT/KBCT), Boca Raton, FL -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | Boca Raton Public Airport, FL (BCT/KBCT) |
| Boca Raton Public Airport, FL (BCT/KBCT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Following a partial loss of engine power after takeoff, the pilot returned to the airport and performed a visual inspection and engine test run with a mechanic, which revealed no anomalies. The pilot then chose to perform another flight without identifying the cause of the loss of engine power and the mechanic agreed to accompany him. As the airplane climbed through 400 to 500 ft above ground level after takeoff, the engine ran rough, and the pilot started a turn back to the airport. The engine subsequently lost total power and the airplane impacted terrain and obstacles.
The airplane was equipped with an engine monitor that captured exhaust gas temperatures (EGT), cylinder head temperatures (CHT), and turbine inlet temperature (TIT). TIT is the direct measurement of the temperature of combined exhaust from all cylinders immediately before it enters the turbocharger, but the measurement itself is not used in the normal operation of the turbocharger. The data showed a rapid drop in TIT about 45 seconds before changes in the CHT and EGT associated with both loss of power events on the day of the accident. The data also recorded three other sessions in which the TIT dropped similarly, but there were no associated changes to EGT or CHT values to indicate a loss of engine power on those occasions. No evidence was found to indicate a loss of engine power resulted directly from the changes in TIT or what caused those changes.
Examination of the engine revealed a hole in the turbocharger's automatic wastegate controller diaphragm, which would result in the wastegate failing toward the closed position. The closed wastegate would increase manifold pressure and decrease the efficiency of the turbocharger at higher altitudes; however, a closed wastegate would not result in a total loss of engine power. The reason for the loss of engine power could not be determined based on available evidence.
Probable Cause: The total loss of engine power for reasons that could not be determined based on available evidence and the pilot's decision to take off without fully troubleshooting the partial loss of engine power that occurred during the previous flight.
Accident investigation:
 |
|
Sources:
NTSB CEN19LA317
https://flightaware.com/live/flight/N2890T/history/20190911/1330Z/KBCT/KBCT
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N2890T
Location
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Sep-2019 17:30 | Captain Adam | Added |
| 11-Sep-2019 17:50 | harro | Updated [Location, Departure airport] |
| 11-Sep-2019 22:13 | Geno | Updated [Time, Aircraft type, Registration, Cn, Operator, Location, Departure airport, Source, Narrative] |
| 11-Sep-2019 22:59 | RobertMB | Updated [Time, Registration, Location, Phase, Nature, Source, Narrative] |
| 11-Sep-2019 23:11 | RobertMB | Updated [Location] |
| 12-Sep-2019 19:40 | Iceman 29 | Updated [Source, Embed code] |
| 07-Mar-2020 18:22 | Anon. | Updated [Embed code] |
| 01-Jul-2022 17:27 | ASN Update Bot | Updated [Time, Other fatalities, Destination airport, Source, Embed code, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation