Stol UC 1 N950TB

Summary

On 25 October 2014 at about 20:00 local time, a Stol UC 1 registered N950TB, operated by Yellow Peril Aero LLC, was involved in an accident near Jacksonville, Texas, United States. 4 people were on board and 2 had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

25 October 2014 at 20:00

Classification

Accident

Location

Jacksonville, Texas, United States

Nearest airport

Flying M Ranch (7TA7)

Coordinates

31.9408, -95.1361

Aircraft

Stol UC 1

Registration

N950TB

Category

Airplane

Year built

1980

Engines

2

Operator

Yellow Peril Aero LLC

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Reklaw → Fulshear

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CEN15LA038

2 people had minor injuries.

The loss of right engine power while climbing due to fuel starvation for reasons that could not be determined during postaccident airplane examination and testing, which led to a forced landing on hilly terrain.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The pilot reported that he was flying the twin-engine airplane on a cross-country flight. During the climb to about 2,200 ft mean sea level, the right engine "quit." The pilot performed the engine-out procedures checklist, and the right engine power was restored for about 2 minutes before the engine lost power again. The pilot was unable to restart the right engine and secured it. He then diverted toward the nearest airport, but the airplane would not maintain altitude, so he conducted a forced landing in hilly terrain short of the airport, during which the airframe sustained substantial damage. During examination of the wreckage, no debris was found in the fuel strainers. A review of the data recorded by the engine data monitor from the previous flight showed that, toward the end of the flight's recorded data, the right engine's cylinder head temperature and exhaust gas temperature (EGT) dropped, consistent with a reduction of power in the right engine. A review of the accident flight data showed that, about 8 minutes into the flight, the right engine's EGT dropped from about 1,400 to about 375 degrees F for the next 30 seconds, increased to about 1,400 degrees F for the next 30 seconds, and then dropped again. The reason for the right engine's power interruption could not be determined based on the review of the data. Subsequent examination of the fuel lines revealed no anomalies or debris. The right engine fuel servo was test run, and met the flow test bench specifications. Based on the available evidence, the right engine likely experienced a fuel flow interruption, which led to fuel starvation and a loss of engine power. The reason for the fuel flow interruption could not be determined.

Quoted verbatim from the NTSB record.