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June 23, 2011 · Beech B36TC · N93PP

Akron, CO

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
June 23, 2011
Injury Outcomes
2 injuries (2 minor injuries)
Location
Akron, CO
Aircraft
Beech B36TC
Tail Number
N93PP
Operator
Arizona Thunderbolts
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
CEN11LA457

The pilot reduced power for landing because the approach was slightly high. When he added power to arrest the descent, the engine failed to respond. The airplane landed short of the runway. The impact drove the main landing gear through the right wing. Examination and functional testing of the engine revealed that the mixture control cable was disconnected from the cable housing attach clamp. The cable was reattached and the engine functioned normally with no anomalies noted.

NTSB Probable Cause

The mixture control cable disconnected from the cable housing attach clamp, which resutlted in the pilot's inability to add power when needed.

Full Narrative

On June 23, 2011, about 0915 mountain daylight time, a Beech B36TC, N93PP, impacted terrain short of the runway at Colorado Plains Regional Airport (AKO), Akron, Colorado. The pilot and passenger on board the airplane sustained minor injuries. The airplane was substantially damaged. The airplane was registered to and operated by Arizona Thunderbolts LLC, Phoenix, Arizona, under the provisions of 14 Code of Federal Regulations (CFR) Part 91 as a personal flight. Visual meteorological conditions (VMC) prevailed at the time of the accident, and no flight plan had been filed. The flight originated at Yuma (2V6), Colorado, approximately 0900 and was en route to AKO. According to the pilot, he reduced power for landing because he was slightly high. When he added power to arrest the descent, the engine failed to respond. The airplane landed short of the runway. The impact drove the main landing gear through the right wing. During the first functional test, the engine was started using high boost prime. When low boost was selected, the engine quit. During a second examination, it was discovered that the mixture control cable was disconnected from the cable housing attach clamp. When the mixture control was moved inside the cockpit, the cable and housing moved together. The mixture control cable was reconnected and the engine was functionally tested again. The engine operated at all power settings, from idle to 2,800 rpm. Mixture adjustments were made with no anomalies noted.

Flight

Event TypeAccident
Event Time09:15 MDT
Nearest AirportColorado Plains Regional (0nm)
Runway11
Runway Length7000 ft
Runway Width100 ft
Flight Plan FiledUnknown
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBeech B36TC
Tail NumberN93PP
Aircraft CategoryAir
DamageSubstantial
OperatorArizona Thunderbolts
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520-UB · Reciprocating · 300
Seats6

People & Injuries

Injury Summary2 injuries (2 minor injuries)
Fatal0
Serious0
Minor2
Uninjured0
Total2
Crew 1Age 66 · Second Class · None

Conditions

ConditionsVMC
LightDaylight
Wind180° @ 13 kt, gusting 20 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point46
Altimeter30.04 inHg
Observation Time14:50
Weather SourcePILO

Appendix: Source Data