DEN05LA139

NTSB accident investigation · Mooney M20K · Englewood, CO · May 29, 2005

Accident · No injuriesLimited investigationFinal report
Date
May 29, 2005, 09:30 local (15:30 UTC)
Place
Englewood, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N928MBMooney M20K
Weather
Visual (VMC) · Day
Status
Completed · report February 28, 2006
Report
Approved by Office Director
Parties
DEN FSDO
FAA report
20050529023799A
Case key
62485

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

the pilot's failure to maintain control of the airplane and the pilot's improper use of unusual attitude recovery procedure. Contributing factors were the failure of the HSI and the clouds.

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 control - in flightClimb - to cruise
Flight/nav instruments,horiz situation ind(hsi) - failure,totalFactor
Spatial disorientationPilot in command
Weather condition - cloudsFactor
Aircraft control - not maintainedPilot in commandCause
Airframe/component/system failure/malfunctionDescent - uncontrolled
Wing,spar - overload
Improper use of procedurePilot in commandCause
Wing - bent

Analysis

According to the pilot, he was in instrument meteorological conditions and climbing to his cruise altitude when the horizontal situation indicator (HSI) failed. He became disoriented, the airplane got into an unusual attitude, and he lost control of the airplane. When the airplane broke out of the clouds, it was descending rapidly, and he pulled back hard on the control yoke to arrest the descent. During the recovery, the airplane's structural limitations were exceeded and the airplane was overstressed. According to a telephone interview with a mechanic who replaced the HSI at Duncan Aviation, a repair shop located at APA, a plastic gear in the HSI was "stripped" and the heading bug caused the compass card to "hang-up."

Factual narrative

On May 29, 2005, approximately 0930 mountain daylight time, a Mooney M20K, N928MB, piloted by a private pilot, was substantially damaged when it was overstressed after departing Centennial Airport (APA), Englewood, Colorado. Instrument meteorological conditions prevailed at the time of the accident. The personal cross-country flight was being conducted under the provisions of Title 14 CFR Part 91. An instrument flight rules flight plan had been filed. The pilot, the sole occupant of the airplane, sustained no injuries. The flight originated at APA approximately 0900 and was en route to Camarillo Airport (CMA), Camarillo, California.

According to the pilot, he was in instrument meteorological conditions and climbing to his cruise altitude when the horizontal situation indicator (HSI) failed. He became disoriented, the airplane got into an unusual attitude, and he lost control of the airplane. When the airplane broke out of the clouds, it was descending rapidly, and he pulled back hard on the control yoke to arrest the descent. During the recovery, the airplane's structural limitations were exceeded and the airplane was overstressed.

According to a telephone interview with a mechanic who replaced the HSI at Duncan Aviation, a repair shop located at APA, a plastic gear in the HSI was "stripped" and the heading bug caused the compass card to "hang-up."

According to an FAA airworthiness safety inspector, the wing was wrinkled and the accompanying rivets were "popped." Damage to the wing was such that the insurance company wrote off the airplane as a total loss. The pilot was unaware of the damage to the airplane and had flown it on numerous occasions after the accident. When the damage was brought to his attention, he reported the accident.

Aircraft

Registration
N928MB
Reported as
Mooney M20K
Category
Airplane
Serial number
25-0859
Airframe hours
2,706
Engine
Continental TSIO-360-GB, 210 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Martin Lawrence
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 1, 2005 · 50 hours before
Departed
APA · Englewood, CO
Destination
CMA · Camarillo, CA
Flight plan
IFR
Airport
APA · Centennial Airport

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
61
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Without waivers/limitations
Last flight review
August 1, 2003
Seat
Left
Flight hours
3,000 total · 2,260 in this make and model · 50 in the last 90 days · 20 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
60° at 5 knots
Visibility
10 statute miles
Lowest ceiling
1,500 ft broken
Temperature
48 °F, dew point 41 °F
Altimeter
30.09 inHg
Observed at
APA

FAA reports on this event · 1

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