DEN03LA130

NTSB accident investigation · Aerostar RX-8 · Snowmass Villag, CO · July 16, 2003

Accident · No injuriesLimited investigationFinal report
Date
July 16, 2003, 06:30 local (12:30 UTC)
Place
Snowmass Villag, CO
Injuries
10 uninjured
Phase of flight
Enroute
Aircraft
N35965Aerostar RX-8N5047CAerostar S-71A
Weather
Visual (VMC) · Day
Status
Completed · report March 30, 2004
Report
Approved by Office Director
Parties
FAA FSDO
Case key
57481

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

On this page

Probable cause

the failure of the pilot of balloon #2 to maintain clearance from balloon #1 while overtaking him.

the failure of the pilot of balloon #2 to maintain clearance from balloon #1 while overtaking him.

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.

Midair collisionCruise
Altitude/clearance - not maintainedPilot of other aircraftCause
Midair collisionCruise
Altitude/clearance - not maintainedPilot in commandCause

Analysis

Balloon #1 N35965 departed approximately 1 to 2 minutes after balloon #2 N5047C departed. Balloon #2 had proceeded slightly west of a creek bed. Approximately 1 mile down the creek bed, #1 passed #2. Two miles further down the creek bed, #2 had obtained a faster ground speed and began to close in on balloon #1. The pilot of balloon #2 initiated an accent to climb up and over balloon #1. The basket of balloon #2 impacted the envelope of balloon #1 approximately 20 feet down from the top of the balloon causing substantial damage to the envelope.

Balloon #1 N35965 departed approximately 1 to 2 minutes after balloon #2 N5047C departed. Balloon #2 had proceeded slightly west of a creek bed. Approximately 1 mile down the creek bed, #1 passed #2. Two miles further down the creek bed, #2 had obtained a faster ground speed and began to close in on balloon #1. The pilot of balloon #2 initiated an accent to climb up and over balloon #1. The basket of balloon #2 impacted the envelope of balloon #1 approximately 20 feet down from the top of the balloon causing substantial damage to the envelope.

Factual narrative

See narrative DEN03LA130A.

On July 16, 2003, at approximately 0630 mountain daylight time, an Aerostar RX-8 balloon, N35965, was substantially damaged when it collided with another Aerostar S-71A balloon, N5047C, near Snowmass Village, Colorado. The commercial pilot and his two passengers aboard N35965, and the commercial pilot and his six passengers aboard N5047C were not injured. Visual meteorological conditions prevailed. Both flights were being conducted under the provisions of Title 14 CFR Part 91. No flight plan had been filed for the local flights that originated at approximately 0610.

According to both pilots, balloon #1, N35965 (a 90,000 cubic foot balloon), departed from Snowmass Village approximately 1 to 2 minutes after balloon #2, N5047C (a 175,000 cubic foot balloon). Both balloons proceeded down the "Brush Creek Valley floor at an altitude of 10 feet to 100 feet agl." Balloon #2 had proceeded slightly west of the creek bed. Approximately 1 mile down the creek bed, #1 passed #2. Two miles further down the creek bed, #2 had obtained a faster ground speed and began to close in on balloon #1. Verbal contact was established between the two balloon pilots, noting the variance in speed and direction of travel. The pilot of balloon #2 initiated an accent to climb up and over balloon #1. The pilot of balloon #1 attempted to maintain level flight to allow balloon #2 to pass clear.

The basket of balloon #2 impacted the envelope of balloon #1 approximately 20 feet down from the top of the balloon. The pilot and passengers of balloon #2 attempted to push balloon #1 away. Balloon #2 continued to climb and the basket snagged the envelope of balloon #1, tearing the balloon envelope. The pilot of balloon #2 was able to separate the envelope from the basket and continue to climb. The pilot of balloon #1 made a forced landing and the pilot of balloon #2 continued flight for approximately 1 mile. Both balloons landed without further incident.

According to CFR Part 91, Chapter 113, (b) "When a rule of this section gives another aircraft the right-of-way, the pilot shall give way to that aircraft and may not pass over, under or ahead of it unless well clear." (f) "Overtaking. Each aircraft that is being overtaken has the right-of-way..."

Aircraft · 2

Registration
N35965
Reported as
Aerostar RX-8
Category
Balloon
Serial number
RX8-3004
Airframe hours
451.6
Engine
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 6, 2003 · 5.7 hours before
Departed
NONE · Snowmass Villag, 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.

Registration
N5047C
Reported as
Aerostar S-71A
Category
Balloon
Serial number
S71A-3022
Damage
No damage
Flight
Personal · Part 91
Registered owner
Adventures Out West
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 27, 2003
Departed
NONE · Snowmass Villag, 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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N35965
Age
37
Injuries
None
Certificates
Commercial, Flight instructor
Last flight review
June 23, 2003
Flight hours
880 total · 288 in this make and model · 797 as pilot in command · 39 in the last 90 days · 33 in the last 30 days · 1 in the last 24 hours
Role
Pilot, aircraft N5047C
Age
30
Injuries
None
Certificate
Commercial
Last flight review
November 1, 2002
Flight hours
177 total · 22 in this make and model · 161 as pilot in command · 25 in the last 90 days · 7 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
52 °F, dew point 43 °F
Altimeter
30.45 inHg
Observed at
ASE, 2 nm away