DEN85LA078

NTSB accident investigation · Raven S55A · Littleton, CO · January 13, 1985

Accident · No injuriesLimited investigationFinal report
Date
January 13, 1985, 09:15 local (16:15 UTC)
Place
Littleton, CO
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Emergency descent
Aircraft
N81DSRaven S55A
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19850113000779A
Case key
16635

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

On this page

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.

Forced landingDescent - emergency
Weather condition - high windFactor
Preflight planning/preparation - inadequatePilot in commandCause
Preflight planning/preparation - inaccurateAtc personnel(fss)Cause
Compensation for wind conditions - not understoodPilot in commandCause
Judgment - inaccuratePilot in commandCause
On ground/water collision with objectLanding - roll
Object - fenceFactor
Object - wire,transmissionFactor
Balloon equipment,envelope - improperCause
Balloon equipment,envelope - failure,partialCause
Balloon equipment,basket - penetratedFactor

Analysis

The balloon envelope collided with power lines after dragging the basket & occupants aprx 200 yards along an open fld and through a fence which damaged the basket containing the occupants. The balloon plt said that the wind was only 5 KTS at takeoff but after 30 minutes of flt a wind described by the plt as 'sheer (SIC) from aprx 150 ft to surface, 30-35 mph-flapgs on flag poles standing straight out-looked for lndg area-vented the balloon & prepared for lndg.' Further atatement by the plt contained info that the vent opening created a sail effect to increase the resultant drag. Plt also said, 'tried pulling top out of balloon but only 1/3 of top released causing a dragging effect.' The balloon envelope finally contacted & draped over the power lines & was damaged during the contact & later during removal. Interviews with several commercial balloon plts & a representative of raven industries, sioux falls, SD, revealed that most balloon plts can expect a safe lndg in winds of 10 mph or less & a risk in higher winds.

Aircraft

Registration
N81DS
Reported as
Raven S55A
Category
Balloon
Serial number
748
Airframe hours
252
Engine
None NONE, unknown
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Wynona K. Siverson
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 16, 1984 · 30 hours before
Departed
Chatfield Reser, CO

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
35
Certificate
Commercial
Flight hours
144 total · 144 in this make and model · 126 as pilot in command · 2 in the last 90 days · 1 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 30 knots
Visibility
50 statute miles
Lowest ceiling
None
Temperature
19 °F, dew point 7 °F
Altimeter
30.00 inHg

FAA reports on this event · 1

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

Other investigations on N81DS · 1

Matched to the same aircraft by N-number and date.