CEN13LA110

NTSB accident investigation · Beech 95-B55 (T42A) · Las Cruces, NM · December 21, 2012

Accident · Minor injuriesLimited investigationFinal report
Date
December 21, 2012, 16:50 local (23:50 UTC)
Place
Las Cruces, NM
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N30WCBeech 95-B55 (T42A)
Defining event
Enroute-descent: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report June 24, 2013
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA Flight Standards District Office
Case key
85873

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's failure to properly manage the airplane's fuel, which resulted in engine failure due to fuel starvation.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Fuel system: fuel selector/shutoff valveAircraft › Aircraft systems · Incorrect use/operationBeech 95-B55 (T42A): 1 caseAll aircraft: 176 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelBeech 95-B55 (T42A): 15 casesAll aircraft: 1,695 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot said he added 31 gallons of fuel (for a total 0f 70 gallons) prior to departure. The fuel gauges indicated the main tanks were one-half to three-quarters full, with the remainder in the auxiliary tanks. The fuel selectors were on the main tanks. After a short 10-minute flight, the pilot executed an ILS approach in VMC. Ten miles from the runway threshold, the right engine started surging. Fuel flow fluctuated between 28 gph and 2 gph. He advanced the throttle, propeller, and mixture controls and turned on the fuel boost pumps. The airplane yawed and he identified the right engine as having lost power. He feathered the propeller and secured the engine. Shortly thereafter, the left engine lost power. The airplane impacted terrain, shearing off the left wing. The right engine was partially separated from the right wing. An FAA inspector examined the wreckage and said the right propeller was not feathered and both fuel selectors were in the auxiliary tank position. The left engine throttle, propeller, and mixture controls were full forward. The right engine throttle and propeller control were only slightly retarded, and the mixture control was in the IDLE CUTOFF position. Both fuel selectors were positioned on the auxiliary tanks, but the fuel gauge selector switch was on the main tanks.

Factual narrative

On December 21, 2012, at 1650 mountain standard time, a Beech 95-B55, N30WC, impacted terrain 2 miles southeast of runway 30 while on landing approach to Las Cruces International Airport (KLRU), Las Cruces, New Mexico. The pilot, the sole occupant on board, sustained minor injuries. The airplane was substantially damaged. The airplane was registered to and operated by the pilot under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed at the time of the accident, and no flight plan had been filed. The local flight originated from Santa Teresa (5T6), New Mexico, approximately 1640. According to the pilot's accident report, he added 31 gallons of fuel (for a total of 70 gallons) prior to departing K5T6. The fuel gauges indicated the main tanks were one-half to three-quarters full, with the remainder in the auxiliary tanks. The fuel selectors were on the main tanks. He executed the ILS (instrument landing system) to runway 30, in visual meteorological conditions, and was 10 miles from the runway threshold when the right engine started surging. Fuel flow fluctuated between 28 gph (gallons per hour) to 2 gph. He advanced the throttle, propeller, and mixture controls and turned on the fuel boost pumps. He said the airplane yawed 45 to 70 degrees left and right, and he identified the right engine as having lost power. He feathered the propeller and secured the engine. Shortly thereafter, the left engine lost power. The airplane impacted terrain, shearing off the left wing. The right engine was partially separated from the right wing. In a hospital interview, the pilot told a Federal Aviation Administration (FAA) inspector that he had shut down the right engine and he described the procedure he used. The inspector told the pilot that the right propeller had not been feathered and that both fuel selectors were in the auxiliary tank position. Photographs taken by the inspector showed the left engine throttle, propeller, and mixture controls were full forward. The right engine throttle and propeller control were only slightly retarded, and the mixture control was in the IDLE CUTOFF position. Both fuel selectors were positioned on the auxiliary tanks, but the fuel gauge selector switch was on the main tanks. In his written statement, the inspector estimated there should have had about 7 gallons in each auxiliary tank, and he computed this to be the fuel remaining after a flight from Santa Teresa to the accident site. The inspector also noted a placard affixed on the instrument panel, warning: DO NOT TAKE OFF IF FUEL QUANTITY GAGE INDICATES IN YELLOW ARC OR WITH LESS THAN 13 GALLONS IN EACH MAIN TANK.

Aircraft

Registration
N30WC
Reported as
Beech 95-B55 (T42A)
Category
Airplane
Serial number
TC-628
Airframe hours
11,136
Engines
Cont Motor I0-470 SERIES, 260 horsepower, reciprocatingContinental IO-470-L, 260 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Sean M. Tommervik
Registered owner
Sean M. Tommervik
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 2, 2012 · 77 hours before
Departed
5T6 · Santa Teresa, TX
Destination
KLRU · Las Cruces, NM
Airport
KLRU · Las Cruces International, runway 30, 7,506 × 100 ft, concrete

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
24
Injuries
Minor
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
December 7, 2012
Seat
Left
Flight hours
935 total · 143 in this make and model · 847 as pilot in command · 44 in the last 90 days · 31 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
0° at 0 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
43 °F, dew point 5 °F
Altimeter
30.20 inHg
Observed at
KLRU

Docket · 10

The files NTSB released with the investigation on March 21, 2013, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.8 MB in all.