DEN83LA172

NTSB accident investigation · Cessna T188C · Bozeman, MT · July 22, 1983

Accident · No injuriesLimited investigationFinal report
Date
July 22, 1983, 10:30 local (16:30 UTC)
Place
Bozeman, MT
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N2834JCessna T188C
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19830722034519A
Case key
16122

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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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 power(total) - nonmechanicalManeuvering - aerial application
Throttle/power control - improper use ofPilot in commandCause
Mixture - improper use ofPilot in commandCause
Load jettison - performedPilot in commandCause
Forced landingLanding - flare/touchdown
In flight collision with objectLanding - flare/touchdown
Object - tree(s)Factor

Analysis

The acft settled into trees after the engine lost power during a swath run. The flt had been in progress for about 15 minutes. The plt started the 4th run and the acft started to settle. The plt dumped the load but did not touch the throttle or mixture. He had set the throttle and mixture for the operation and tightened the friction adjustment. The mixture had been leaned to peak temperature and then enriched so the cyl head temp was peak temp minus 125 degrees. The manifold pressure was 32 inches and the prop set at 2400 RPM the pilot was asked about his use or power and mixture and he said he did not move or adjust them from the time he set them after initial leveloff until ground impact. He saidthat after the accident these controls were in a normal flt position. The pilot was wearing a helmet and said it would be possible for the engine to stop and him not be able to hear it. From the condition of the propeller it was determinedthat the engine was not producing power at impact. During inspection, nothing was found wrong with the powerplant.

Aircraft

Registration
N2834J
Reported as
Cessna T188C
Category
Airplane
Serial number
T18803528T
Airframe hours
760
Engine
Continental TS10-520-T, 310 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Boyd J. Morgan
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · April 15, 1983

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
38
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
1,490 total · 40 in this make and model · 40 in the last 90 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
310° at 5 knots
Visibility
20 statute miles
Lowest ceiling
20,000 ft broken
Temperature
70 °F, dew point 48 °F
Altimeter
30.00 inHg
Observed at
BZN, 7 nm away

FAA reports on this event · 1

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