LAX08LA107

NTSB accident investigation · Piper PA-30 · Holbrook, AZ · April 15, 2008

Accident · Serious injuriesLimited investigationFinal report
Date
April 15, 2008, 08:20 local (15:20 UTC)
Place
Holbrook, AZ
Injuries
1 serious, 1 minor
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N8442YPiper PA-30
Defining event
Enroute-descent: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report April 15, 2009
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20080415842529A
Case key
67825

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

A total loss of engine power due to fuel starvation as a result of the pilot's fuel system mismanagement and incorrect positioning of the fuel selector valves.

Findings · 3

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.

Use of equip/info: use of equip/systemPersonnel issues › Task performance · PilotPiper PA-30: 13 casesAll aircraft: 1,391 casesProbable cause
Fuel system: fuel selector/shutoff valveAircraft › Aircraft systems · Incorrect use/operationPiper PA-30: 2 casesAll aircraft: 176 casesProbable cause
Terrain: rough terrainEnvironmental issues › Physical environment · Contributed to outcomePiper PA-30: 3 casesAll aircraft: 442 cases

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 reported that prior to takeoff the two main fuel tanks were full to the bottom of the fill cap and the two auxiliary tanks had approximately 8 gallons in each side. About 40 minutes into the flight, and descending to the destination, the right engine lost power. The pilot stated that he did not immediately feather the prop and shut the engine down because it appeared to be a fuel starvation problem. The pilot was attempting to restart the right engine when the left engine lost power. Unable to reach the airport, the pilot initiated a gear-up forced landing to an open field. The airplane landed hard, damaging the fuselage. Recovery personnel reported that the main fuel tanks contained about 27 gallons of fuel each, while the auxiliary tanks were empty. Postaccident inspection of the engines revealed that the fuel lines leading to the engines were dry. The right engine crankshaft's flange was bent, but a test run of the left engine indicated that the engine operated normally. Evidence indicates that the pilot improperly positioned the fuel selectors so that they were on the auxiliary tanks instead of the main fuel tanks. The auxiliary tanks ran dry and the engines lost power due to fuel starvation. The pilot indicated to a Federal Aviation Administration inspector that he had difficulty viewing the fuel selectors on the floor between the seats.

Factual narrative

On April 15, 2008, approximately 0820 mountain standard time, a Piper PA-30, N8442Y, was substantially damaged during a forced landing near Holbrook, Arizona. The private pilot received serious injuries and his pilot rated passenger received minor injuries. Environmental Technology Inc., Phoenix, Arizona, was operating the airplane under 14 Code of Federal Regulations Part 91. Visual meteorological conditions prevailed for the cross-country personal flight, which originated from Mesa, Arizona, approximately 50 minutes before the accident. A flight plan had not been filed, but the pilot reported that his destination was Holbrook, Arizona.

The pilot stated, in his initial interview and in his written statement, that the two main fuel tanks were "full to the bottom of the fill cap and the two inboard tanks had approximately 8 gallons in each side."

The pilot reported that approximately 40 minutes into the flight they were descending towards their destination when the right engine lost power. The pilot stated that, "I did not immediately feather the prop and shut down the engine because it appeared to be a fuel starvation problem and I thought I could probably get the engine started again." While the pilot was attempting to restart the right engine without success, the left engine lost power. Due to the low altitude, the pilot decided to land the airplane in a field.

The pilot rated passenger reported that the forced landing was well controlled, but the gear up touchdown was hard and the terrain was very rough. The airplane's empennage was bent down, and the nose was wrinkled up and back at the forward door support.

The aircraft salvage team personnel who recovered the airplane reported that they drained 27 gallons of fuel from each of the main tanks. Both auxiliary and wing tip tanks were empty. The right side fuel selector was located at 12 o'clock (between the MAIN and AUX positions) and the left side fuel selector was found at 3 o'clock, which is the cross-feed position.

Postaccident examination of the airplane by an inspector from the Federal Aviation Administration (FAA) revealed that the fuel lines leading to the engines were dry. The right engine crankshaft's flange was bent, but a test run of the left engine was successful.

In the aircraft's Service Manual, the manufacturer states that each wing had a main inboard fuel tank that held 30 gallons [27 usable], an auxiliary outboard fuel tank that held 15 gallons and a wing tip tank that held 15 gallons of fuel. Each engine's fuel selector is appropriately labeled LEFT and RIGHT, respectively, at their 12 o'clock location. Each MAIN tank selection points inboard, i.e., the left selector is at 1:30 position and the right selector is at 10:30 position. Conversely, during AUX tank use the two selectors point outboard, i.e., the left selector should be at the 10:30 position and the right selector should be at the 1:30 position. Additionally, the AUX selected position states LEVEL FLT. ONLY. A separate switch operates an electrically actuated valve, which permits the wing tip fuel to drain into the main tank.

The owner of the airplane said that the pilot had "a lot" of time in Cessna 421s. The Cessna 421 fuel tank selectors operate differently. The left engine's main tank fuel selection is at 10:30 and the right engine's main tank fuel selection is at 1:30. The owner believes that the pilot improperly positioned the fuel selectors so that they were on the aux tanks instead of the main tanks.

The pilot reported 3,478 hours in multi-engine airplanes, with 12 hours in the make and model airplane involved in the accident.

The FAA inspector reported that the pilot stated he had difficulty viewing the fuel selectors on the floor between the seats.

Aircraft

Registration
N8442Y
Reported as
Piper PA-30
Category
Airplane
Serial number
30-1602
Airframe hours
3,290
Engine
Lycoming IO-320-C1A, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Environmental Technology Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 1, 2007
Departed
FFZ · Mesa, AZ
Destination
P14 · Holbrook, AZ

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
75
Injuries
Serious
Certificate
Private
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
July 13, 2006
Seat
Left
Flight hours
6,782 total · 12 in this make and model · 12 in the last 90 days · 12 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
150° at 13 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 14 °F
Altimeter
29.95 inHg
Observed at
INW, 20 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.