DEN83LA081

NTSB accident investigation · Cessna 421C · Gunnison, CO · March 18, 1983

Accident · No injuriesLimited investigationFinal report
Date
March 18, 1983, 16:45 local (23:45 UTC)
Place
Gunnison, CO
Injuries
7 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N67943Cessna 421C
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19830318008829A
Case key
16054

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.

OverrunTakeoff
Weather condition - temperature extremesFactor
Weather condition - snowFactor
Weather condition - tailwindFactor
Wrong runway - selectedPilot in commandFactor
Aborted takeoff - delayedPilot in commandCause
Airport facilities,runway/landing area condition - wetFactor
Gear collapsedTakeoff
Terrain condition - softFactor
Terrain condition - high vegetationFactor

Analysis

The plt began taking off on rwy 06 with a wind from 190 deg at 8 KTS. He stated that max power & RPM were obtained. He noted that he obtained 39 inches of manifold pressure & 2235 RPM at 100 KTS IAS. Reportedly, the acft rotated properly, but began to vibrate & shudder & would not lift off. The plt then lowered the nose & accelerated to 110 KTS IAS. However, again, the acft would only vibrate & shudder & would not lift off. The plt then began aborting the takeoff. The acft went off the end of the rwy at 70 to 80 KTS & became airborne for aprx 75 ft as it went over a drop off in the terrain. Subsequently, the acft landed in soft soil & high grass where the gear collapsed. An investigation revealed that the temp was 30 deg & snow was falling. The plt believed the accident resulted from cold temps along with water blown onto the tail surfaces of the acft. He did not describe the surface condition on the wings. Stall speed for this acft was 86 KTS at the max gross wt & was with wt & balance limits.

Aircraft

Registration
N67943
Reported as
Cessna 421C
Category
Airplane
Serial number
421C1036
Airframe hours
684
Engine
Continental IO-520-N, 365 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
J&K Asset Management
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · December 8, 1982
Departed
GUC · Gunnison, CO
Destination
OUN · Norman, OK
Flight plan
IFR
Airport
GUC · Gunnison, runway 6, 7,198 × 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
32
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
2,117 total · 348 in this make and model · 1,383 as pilot in command · 59 in the last 90 days · 9 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 8 knots
Visibility
15 statute miles
Lowest ceiling
5,000 ft overcast
Temperature
30 °F, dew point 30 °F
Altimeter
29.00 inHg
Observed at
GUC

FAA reports on this event · 1

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