CEN14CA227

NTSB accident investigation · Piper PA 24-250 · New Braunfels, TX · May 2, 2014

Accident · No injuriesData collectionFinal report
Date
May 2, 2014, 17:00 local (22:00 UTC)
Place
New Braunfels, TX
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N7308PPiper PA 24-250
Defining event
Enroute-cruise: Fuel exhaustion
Weather
Visual (VMC) · Day
Status
Completed · report June 5, 2014
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20140502006279A
Case key
89160

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

On this page

Probable cause

The loss of engine power due to fuel exhaustion, which resulted from the pilot's inadequate preflight planning and inflight decision making.

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.

Planning/preparation: fuel planningPersonnel issues › Task performance · PilotPiper PA-24-250: 12 casesAll aircraft: 719 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelPiper PA-24-250: 24 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 with three passengers planned to depart and return on a cross-country flight. The pilot stated that the airplane's left fuel tank was filled to an inch below the collar, and the right fuel tank was filled to two inches below the collar. He estimated that the airplane had 40-45 gallons of fuel on board, with a planned en route time of 57 minutes, and about a 10 knot tailwind. Once at a cruise altitude of 7,500 feet, he set the manifold pressure at 21 inches and engine rpm at 2,300 for a fuel burn of 12.3 gallons/hr per the pilot operating handbook. The pilot reported for the return leg he again visually checked the fuel level in each tank. He estimated 12-15 gallons in the left tank and 10 in the right, for a total of 22-25 gallons. The pilot added that fuel burn seemed normal and he decided not to add fuel, he also stated that estimations are not an accurate science and that a fuel stick was not provided to confirm the fuel level. After departing for the return flight, he switched fuel tanks from the left side to the right side. About 15 minutes later, the pilot noticed a reduction in power and switched back to the left side fuel tank. Engine power was restored, and the pilot stated that he did not feel that the fuel had been exhausted from the right side based on his calculations. A few minutes later, the engine lost power and the pilot preformed a forced landing to a construction site. A post-crash examination of the airplane revealed substantial damage to the airplane's fuselage and left wing during the forced landing. Additionally, the fuel tanks were empty and were not breached in the accident.

Factual narrative

The pilot with three passengers planned to depart and return on a cross-country flight. The pilot stated that the airplane's left fuel tank was filled to an inch below the collar, and the right fuel tank was filled to two inches below the collar. He estimated that the airplane had 40-45 gallons of fuel on board, with a planned en route time of 57 minutes, and about a 10 knot tailwind. Once at a cruise altitude of 7,500 feet, he set the manifold pressure at 21 inches and engine rpm at 2,300 for a fuel burn of 12.3 gallons/hr per the pilot operating handbook. The pilot reported for the return leg he again visually checked the fuel level in each tank. He estimated 12-15 gallons in the left tank and 10 in the right, for a total of 22-25 gallons. The pilot added that fuel burn seemed normal and he decided not to add fuel, he also stated that estimations are not an accurate science and that a fuel stick was not provided to confirm the fuel level. After departing for the return flight, he switched fuel tanks from the left side to the right side. About 15 minutes later, the pilot noticed a reduction in power and switched back to the left side fuel tank. Engine power was restored, and the pilot stated that he did not feel that the fuel had been exhausted from the right side based on his calculations. A few minutes later, the engine lost power and the pilot preformed a forced landing to a construction site. A post-crash examination of the airplane revealed substantial damage to the airplane's fuselage and left wing during the forced landing. Additionally, the Federal Aviation Administration inspector reported that the fuel tanks were empty and were not breached in the accident.

Aircraft

Registration
N7308P
Reported as
Piper PA 24-250 (250)
Category
Airplane
Serial number
24-2483
Built
1961
Engine
Lycoming 0-540 SERIES, 250 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Anderson Aviation
Registered owner
Anderson Thomas DBA
Airworthiness certificate
Standard, Normal
Departed
KDWH · Houston, TX
Destination
1T8 · Bulverde, TX

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
48
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
July 23, 2013
Seat
Left
Restraint
Lap only
Flight hours
397 total · 7.5 in this make and model · 345 as pilot in command · 10.3 in the last 90 days · 6.1 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
290° at 5 knots
Visibility
10 statute miles
Lowest ceiling
11,000 ft broken
Temperature
81 °F, dew point 30 °F
Altimeter
29.95 inHg
Observed at
KBAZ, 5 nm away

Docket · 2

The files NTSB released with the investigation on May 21, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 972 KB in all.

FAA reports on this event · 1

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

Other investigations on N7308P · 1

Matched to the same aircraft by N-number and date.