SEA91LA247

NTSB accident investigation · Piper PA-24-250 · Arco, ID · September 19, 1991

Accident · No injuriesLimited investigationFinal report
Date
September 19, 1991, 12:15 local (18:15 UTC)
Place
Arco, ID
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N7985PPiper PA-24-250
Weather
Visual (VMC) · Day
Status
Completed · report December 15, 1992
Report
Approved by Office Director
FAA report
19910919042269A
Case key
41544

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

Water in the fuel tank and the inability of the pilot to flare for landing after maneuvering to avoid transmission lines in his flight path during the forced landing.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(total) - nonmechanicalDescent - normal
Fluid,fuel - waterCause
Aircraft preflight - inadequatePilot in commandCause
Forced landingDescent - emergency
In flight collision with terrain/waterLanding
Object - wire,transmission
Maneuver - performedPilot in command
Flare - not possiblePilot in command

Analysis

The aircraft was parked on a slope left wing low and had been exposed to rain prior to the flt. The plt sumped all 4 fuel tanks and then visually determined that he had sufficient fuel for the 1 hour flt to destination. After departing on the right main tank and briefly using both aux tanks and approximately 30 minutes into the flt he switched to the left main tank and the engine began missing. Believing that he had no fuel in the left tank he switched to the left aux which he exhausted and back to right main which was also exhausted. After a total of 55 minutes of flt and while approaching his destination he was unable to maintain power on the right aux and executed a forced ldg. During the approach he determined that power lines interfered with his landing and maneuvered to an alternate ldg site. This maneuver resulted in the pilot's inability to safely flare due to sink rate and low airspeed and a hard ldg followed. A total of 5 gallons of fuel was drained from the left main tank subsequent to the forced ldg.

Aircraft

Registration
N7985P
Reported as
Piper PA-24-250
Category
Airplane
Serial number
24-3223
Engine
Lycoming IO-540-C1B5, 250 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Robert D. Bowman
Registered owner
Robert D. Bowman
Departed
U81 · Cold Meadows, ID
Destination
U57 · Arco-Butte, ID

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
66
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Flight hours
1,715 total · 1,330 in this make and model · 1,715 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
50 statute miles
Lowest ceiling
None
Temperature
-0 °F, dew point -0 °F

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 N7985P · 2

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