- Date
- June 23, 2011, 09:15 local (15:15 UTC)
- Place
- Akron, CO
- Injuries
- 2 minor
- Damage
- Substantial damage
- Phase of flight
- Approach
- Aircraft
- N93PPBeech B36TC
- Defining event
- Approach-VFR pattern final: Loss of engine power (partial)
- Weather
- Visual (VMC) · Day
- Status
- Completed · report November 3, 2011
- Report
- Approved by Office Director
- NTSB office
- Central Region
- Parties
- FAA Flight Standards District Office
- FAA report
- 20110623013059A
- Case key
- 81018
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 mixture control cable disconnected from the cable housing attach clamp, which resutlted in the pilot's inability to add power when needed.
Findings · 1
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.
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 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.
Factual 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.
Aircraft
- Registration
- N93PP
- Reported as
- Beech B36TC
- Category
- Airplane
- Serial number
- EA-531
- Airframe hours
- 1,730
- Engine
- Continental TSIO-520-UB, 300 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Arizona Thunderbolts LLC
- Registered owner
- Arizona Thunderbolts LLC
- Airworthiness certificate
- Standard, Utility
- Last inspection
- Annual · March 14, 2011 · 37 hours before
- Departed
- 2V6 · Yuma, CO
- Destination
- Akron, CO
- Flight plan
- Unknown
- Airport
- AKO · Colorado Plains Regional, runway 11, 7,000 × 100 ft, asphalt
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
- Injuries
- None
- Certificates
- Commercial, Airline transport
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, With waivers/limitations
- Last flight review
- July 12, 2010
- Seat
- Left
- Flight hours
- 5,390 total · 64 in this make and model · 3,267 as pilot in command · 9 in the last 90 days · 5 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 180° at 13 knots, gusting 20
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 72 °F, dew point 46 °F
- Altimeter
- 30.04 inHg
- Observed at
- KAKO
Docket · 8
The files NTSB released with the investigation on October 4, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.5 MB 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 N93PP · 1
Matched to the same aircraft by N-number and date.