CEN12CA206

NTSB accident investigation · Hall Jeffrey Hall RV-4 · Calhan, CO · March 24, 2012

Accident · Serious injuriesData collectionFinal report
Date
March 24, 2012, 13:30 local (19:30 UTC)
Place
Calhan, CO
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N605RVHall Jeffrey Hall RV-4
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report May 21, 2012
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20120324005099A
Case key
83225

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

The pilot's loss of airplane control while landing with a gusting tailwind condition.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeHall Jeffrey HALL RV-4: 1 caseAll aircraft: 594 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotHall Jeffrey HALL RV-4: 1 caseAll aircraft: 9,295 casesProbable cause
Performance/control parametersAircraft › Aircraft oper/perf/capability · Not attained/maintainedHall Jeffrey HALL RV-4: 1 caseAll aircraft: 1,269 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported that he departed a private airfield earlier in the day, and, at the time he departed, the wind was from the north about 5 knots. About 3.5 hours later, he returned to the airfield, which has a north-south oriented runway. The pilot stated that, due to terrain obstructions, landing to the north was “unadvisable.” The pilot added that the wind socks at the airfield indicated a slightly northern wind, light and variable, with no gusts. The pilot stated that he flew three passes to assess the wind, then made his approach and landed to the south. He added that, throughout the landing roll, the airplane was not affected by the wind; however, when the airplane was traveling about 5 knots ground speed, a crosswind gust blew the airplane off track, lifted the tail, and the airplane flipped over onto its back. The airplane sustained substantial damage to its vertical stabilizer and canopy. The pilot reported that there were no airplane malfunctions that contributed to the cause of the accident. About an hour before the accident, the automated weather reporting station located about 14 miles west of the airfield reported wind from 040 degrees at 15 knots gusting to 19 knots. About 5 minutes after the accident, the automated weather reporting station located about 19 miles southwest of the airfield reported wind from 050 degrees at 11 knots gusting to 17 knots.

Factual narrative

The airline transport pilot reported that he departed a private airfield earlier in the day and at the time he departed, the wind was from the north about 5 knots. About three and half hours later, he returned to the airfield, which has a north-south oriented runway. The pilot stated that due to terrain obstructions, landing to the north was “unadvisable”. The pilot added that the wind socks at the airfield indicated a slightly northern wind, light and variable, with no gusts. The pilot then stated that he flew three passes to assess the wind, then made his approach and landed to the south. He added that throughout the landing roll the airplane was not affected by the wind; however, when the airplane was at about 5 knots ground speed, a crosswind gust blew the airplane off track, lifted the tail, and the airplane flipped over onto its back. The airplane received substantial damage to its vertical stabilizer and canopy. The pilot also added that there were no airplane malfunctions that contributed to the cause of the accident. At 1226 automated weather reporting station located about 14 miles west of the accident airfield reported wind from 040 degrees at 15 knots gusting to 19. At 1335 the automated weather reporting station located about 19 miles southwest reported the wind from 050 degrees at 11 knots gusting to 17 knots.

Aircraft

Registration
N605RV
Reported as
Hall Jeffrey Hall RV-4
Category
Airplane, amateur-built
Serial number
2179
Engine
Lycoming O-360 SERIES, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Staggerwing Aviation Inc
Registered owner
Staggerwing Aviation Inc
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · March 17, 2011
Departed
KFTG · Watkins, CO
Destination
CD23 · Calhan, CO
Airport
CD23 · Aerobear Field, runway 18, 2,200 × 60 ft, grass/turf

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
68
Certificates
Flight instructor, Flight engineer, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
March 12, 2011
Flight hours
33,000 total · 27 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
40° at 15 knots, gusting 19
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 19 °F
Altimeter
30.15 inHg
Observed at
KMNH, 14 nm away

Docket · 2

The files NTSB released with the investigation on April 30, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 756 KB in all.

FAA reports on this event · 1

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