- Date
- August 24, 1986, 19:49 local (Aug 25, 1986, 01:49 UTC)
- Place
- Helena, MT
- Injuries
- 2 serious
- Damage
- Substantial damage
- Phase of flight
- Approach
- Aircraft
- N4478VMayala Dragonfly
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19860824041949A
- Case key
- 17039
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.
Analysis
The acft was on final apch after completing a x-country from billings, MT, when the accident occurred. The plt stated the acft was low after intercepting the VASI so power was added; however, the eng did not respond. The acft struck a small hill 300 ft short of rwy. Inspection found no evidence of mechanical failure of the engine but the upper cable from throttle control-to-carburetor linkage was bent and the walking beam showed evidence of binding. Additionally, no evidence of cable lubrication was noted.
Aircraft
- Registration
- N4478V
- Reported as
- Mayala Dragonfly
- Category
- Airplane, amateur-built
- Serial number
- 437
- Airframe hours
- 155
- Engine
- Hapi 60-2DM, 60 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Hjalmer A. Mayala
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Annual · August 26, 1985 · 50 hours before
- Departed
- BIL · Billings, MT
- Airport
- HLN · Helena Regional, runway 26, 9,000 × 150 ft, asphalt
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
- 46
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 304 total · 144 in this make and model · 276 as pilot in command · 50 in the last 90 days · 2 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 290° at 7 knots
- Visibility
- 40 statute miles
- Lowest ceiling
- None
- Temperature
- 79 °F, dew point 41 °F
- Altimeter
- 29.00 inHg
- Observed at
- HLN
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 N4478V · 1
Matched to the same aircraft by N-number and date.