CHI02LA261

NTSB accident investigation · Mooney M20C · Warroad, MN · August 25, 2002

Accident · No injuriesLimited investigationFinal report
Date
August 25, 2002, 14:30 local (19:30 UTC)
Place
Warroad, MN
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N9274VMooney M20C
Weather
Visual (VMC) · Day
Status
Completed · report March 2, 2004
Report
Approved by Office Director
Parties
FAA, Minneapolis FSDO
FAA report
20020825024649A
Case key
55776

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 loss of engine power due to the failure of the muffler baffles which blocked the exhaust system. A factor to the accident was the treeline.

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 powerTakeoff
Exhaust system,baffle - failureCause
Exhaust system - blocked(total)Cause
Forced landingEmergency landing after takeoff
In flight collision with terrain/waterEmergency landing after takeoff
Object - tree(s)Factor

Analysis

During initial climb after takeoff the aircraft experienced a loss of engine power and the pilot performed a forced landing into trees. The pilot reported the airplane "lifted off at between 75 and 78 mph and everything was normal. At 25 to 30 feet in the air I began to experience backfiring and loss of power. Then the power resumed momentarily and the engine caught again lifting us above the trees. Then the engine started backfiring severely with [a] loss of power. As we began settling into the trees I shut off the master switch and chose a tree to hit with one wing in order to break our forward motion and to slow the aircraft. The aircraft spun around doing a 180 degree turn settling into the trees." The pilot stated that he "saw a small amount of smoke coming from the [cowling]" after he exited the airplane. Inspection of the engine compartment revealed fire damage to the air filter assembly, air intake ducting, and rubberized engine compartment baffling. All muffler baffles were either burned or missing.

Factual narrative

On August 25, 2002, at 1430 central daylight time, a Mooney M20C, N9274V, piloted by a commercial pilot, sustained substantial damage during an in-flight collision with trees while on initial climb after a takeoff from Northwest Angle Airport, Warroad, Minnesota. Visual meteorological conditions prevailed at the time of the accident. The personal flight was operating under the provisions of 14 CFR Part 91 without a flight plan. The pilot and his passenger reported no injuries. The flight was departing at the time of the accident and the intended destination is unconfirmed.

According to the pilot's written statement, he completed "a preflight check and run up, checking both [magnetos], constant speed check, controls and fuel selector, and began my takeoff roll." The pilot reported the airplane "lifted off at between 75 and 78 mph and everything was normal. At 25 to 30 feet in the air I began to experience backfiring and loss of power. Then the power resumed momentarily and the engine caught again lifting us above the trees. Then the engine started backfiring severely with [a] loss of power. As we began settling into the trees I shut off the master switch and chose a tree to hit with one wing in order to break our forward motion and to slow the aircraft. The aircraft spun around doing a 180 degree turn settling into the trees." The pilot stated that he "saw a small amount of smoke coming from the [cowling]" after he exited the airplane.

An airframe & powerplant mechanic inspected the accident airplane and provided a written report. Inspection of the engine compartment revealed fire damage to the air filter assembly, air intake ducting, and rubberized engine compartment baffling. All muffler baffles were either burned or missing.

Aircraft

Registration
N9274V
Reported as
Mooney M20C
Category
Airplane
Serial number
690075
Engine
Lycoming O-360-A1D, 180 horsepower, reciprocating
Damage
Substantial damage
Fire
In-Flight
Flight
Personal · Part 91
Registered owner
Anthony Benedict Walser
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 1, 2002
Departed
58MN · Warroad, MN
Destination
UNK
Airport
58MN · Northwest Angle Airport, runway 26, 2,380 × 105 ft, grass/turf

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
65
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--no waivers/lim.
Last flight review
June 6, 2001
Seat
Left

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 64 °F
Altimeter
30.00 inHg
Observed at
RRT, 27 nm away

Docket · 2

The files NTSB released with the investigation on June 29, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 364 KB 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.