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NTSB Report

December 17, 1993 · Piper PA-23-250 · N8769B

Showlow, AZ

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
December 17, 1993
Injury Outcomes
3 injuries (3 minor injuries), 1 uninjured
Location
Showlow, AZ
Aircraft
Piper PA-23-250
Tail Number
N8769B
Operator
John C Morrison
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
LAX94LA074

During the en route phase of flight, the certificated airline transport pilot selected both inboard fuel tanks, and the right engine began to cough and surge. The pilot tried to reposition the selector valve to the outboard tanks, but without success and the engine continued to surge. The pilot did not secure the right engine or feather its propeller, and diverted to an alternate airport. The pilot failed to properly plan the approach, and the airplane's airspeed was too fast and its altitude was too high to negotiate the runway. The pilot executed a go-around and applied full power to both engines. The right engine began to lose power and the airplane would not gain sufficient altitude to return to the airport. The pilot elected to land on a dirt road and during the landing roll the right wing struck a tree. Examination of the fuel system disclosed that the right fuel selector valve linkage was bent and the valve was positioned slightly off the off position.

NTSB Probable Cause

the pilot's poorly planned approach, improper emergency procedures, and his failure to feather the propeller. The inoperative fuel selector valve was a factor in this accident.

Full Narrative

On December 17, 1993, at 1400 hours mountain standard time, a Piper PA-23-250, N8769B, collided with a tree while performing an emergency landing in a meadow near Show Low, Arizona. The pilot was conducting an instrument flight rules personal flight to Plainview, Texas. The airplane, registered to and operated by John C. Morrison, Newport Beach, California, sustained substantial damage. The certificated airline transport pilot was not injured; his three passengers sustained minor injuries. Visual meteorological conditions prevailed. The flight originated at Santa Ana Airport, Orange County, California, at 1000 hours. The pilot reported in the Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1/2, that while enroute he selected the inboard fuel tanks. Immediately thereafter, the right engine began to cough and surge. The pilot immediately repositioned the fuel selector valves to the outboard fuel tanks, but without success. The right engine continued to surge intermittently. The pilot elected to divert to Show Low Airport and executed an approach to runway 24. The final approach was too high and too fast to negotiate the runway and the pilot elected to execute a go-around. The pilot retracted the landing gear and applied full power to both engines. The right engine immediately began to lose power and the airplane was unable to gain sufficient altitude to return to the airport after crossing over the departure end of the runway. The pilot elected to land on a dirt road as the surrounding terrain contained numerous rocks and was rough and uneven. The pilot extended the landing gears and successfully landed on the road. During the landing roll, the airplane swerved to the right and the airplane's right wing struck a tree. A postaccident inspection of the aircraft by an aircraft mechanic with airframe and powerplant ratings revealed that the fuel valve on the right engine was "barely out of the off position." He examined the fuel valve and found the selector selected to the "outboard" position. After removing the floorboard, he found the linkage between the fuel switching point and the fuel valve was bent. The mechanic stated "the bend in the cable [linkage] restricted the full length of travel to fully open the fuel valve to the outboard position."

Flight

Event TypeAccident
Event Time14:00 MST
Nearest AirportShow Low Municipal (2nm NNW)
Runway24
Runway Length6000 ft
Runway Width75 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftPiper PA-23-250
Tail NumberN8769B
Aircraft CategoryAir
DamageSubstantial
OperatorJohn C Morrison
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · O-540-A1D5 · Reciprocating · 250
Seats6

People & Injuries

Injury Summary3 injuries (3 minor injuries), 1 uninjured
Fatal0
Serious0
Minor3
Uninjured1
Total4
Crew 1Age 33 · First Class

Conditions

ConditionsVMC
LightDaylight
Wind30° @ 5 kt
Visibility40 sm
CeilingNone
Temperature / Dew Point41 C / 19 C
Altimeter30.00 inHg
Observation Time02:38
Weather SourceWFAC

Appendix: Source Data