DEN84IA070

NTSB incident investigation · Swearingen SA227-AC · Durango, CO · January 15, 1984

Incident · No injuriesIncident investigationFinal report
Date
January 14, 1984, 21:05 local (Jan 15, 1984, 04:05 UTC)
Place
Durango, CO
Injuries
6 uninjured
Damage
Minor damage
Phase of flight
Other
Aircraft
N31088Swearingen SA227-AC
Weather
Visual (VMC) · Night/dark
Status
Completed
Report
Approved by Office Director
FAA report
19840114002419I
Case key
16269

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

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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.

In flight encounter with weatherOther
Weather condition - icing conditionsFactor
Wing - iceFactor
Loss of control - on ground/waterLanding - flare/touchdown
Airspeed - inadequateCopilot/second pilotCause
Supervision - inadequatePilot in commandCause
Directional control - not maintainedCause
Ground loop/swerve - inadvertent
Nose gear collapsedLanding
Airport facilities,runway/landing area condition - icyFactor
Terrain condition - snowbankFactor
Terrain condition - softFactor
Terrain condition - wetFactor

Analysis

According to the captain, the coplt was making the landing & crossed the threshold at 50 to 60 ft AGL at 110 to 115 KTS. He said a slightly higher airspeed was used to compensate for a small abount of ice that remained on the leading edge of the wings. In the flare, the acft yawed left & reportedly touched down with the nose about 15 degs to the left. The left main wheel touched down about 21 ft from the edge of the 150 ft wide rwy. The capt took control & applied corrective action, but the acft went off the rwy, hit a snow bank & mud, then the nose gear collapsed. The normal apch speed was 103 KTS for the acft's weight. According to the flt manual, the apch speed should have been increased by 19 KTS if there was ice on the flying surfaces.

Aircraft

Registration
N31088
Reported as
Swearingen SA227-AC
Category
Airplane
Serial number
AC-520
Airframe hours
1,606
Engine
Garrett TPE 331-11, 1,000 horsepower, turbo prop
Damage
Minor damage
Flight
Part 135
Operator
Trans Colorado Airline
Registered owner
Commuter Airlines Of Co.
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · January 13, 1984 · 15 hours before
Departed
ABQ · Albuquerque, NM
Flight plan
IFR
Airport
DRO · La Plata County, runway 2, 9,200 × 150 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
27
Certificate
Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
7,000 total · 3,200 in this make and model · 5,800 as pilot in command · 220 in the last 90 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/dark
Wind
Calm
Visibility
4 statute miles
Lowest ceiling
2,000 ft overcast
Temperature
25 °F, dew point 23 °F
Altimeter
29.00 inHg
Observed at
DRO

FAA reports on this event · 1

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