DEN89LA077

NTSB accident investigation · Balloon Works AX8-24 · Telluride, CO · February 14, 1989

Accident · No injuriesLimited investigationFinal report
Date
February 14, 1989, 10:00 local (17:00 UTC)
Place
Telluride, CO
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N7127JBalloon Works AX8-24
Weather
Visual (VMC) · Day
Status
Completed · report January 31, 1991
Report
Approved by Office Director
FAA report
19890214021249A
Case key
17673

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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Probable cause

Ice forming in the fuel tank shut off valve, and the burner blast valve resulting in a loss of control during landing.

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.

Airframe/component/system failure/malfunctionLanding
Balloon equipment,burner system - failure,partialCause
Fuel system,fuel shutoff - frozenCause
Throttle/power control - not possible
Loss of control - in flightLanding
Hard landingLanding
Terrain condition - none suitable

Analysis

The commercial plt and two friends were flying his balloon in mountainous terrain. During the approach to land, the plt opened the burner valve to flare. The valve stuck open and the plt attempted to shut off fuel at the propane bottle. That valve stuck open also, and the balloon started to rise. The plt reduced the heat entering the envelope by pulling the burner out of the throat and pointing it overboard. This balloon was equipped with an emergency 'back up' burner system. By using the back up burner, the plt maneuvered and landed in a wooded area. The plt said that after landing, he was able to work the stuck valves until they closed and the fuel flow ceased. A post accident investigation revealed that conditions existed conducive to ice forming in both valves and preventing normal operation.

Aircraft

Registration
N7127J
Reported as
Balloon Works AX8-24
Category
Balloon
Serial number
F8-113
Airframe hours
14
Engine
Unknown UNKNOWN, unknown
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Gary W. Woods
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 1, 1988 · 14 hours before

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
45
Certificate
Commercial
Flight hours
453 total · 14 in this make and model · 441 as pilot in command · 14 in the last 90 days · 14 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
50 statute miles
Lowest ceiling
None
Temperature
30 °F

FAA reports on this event · 1

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