# NTSB LAX86LA318: Glasflugel Standard Libelle, N7190, Markleville, CA, August 10, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 9, 1986, 17:00 local (Aug 10, 1986, 00:00 UTC)
- Place: Markleville, CA
- Coordinates: 38.729904, -119.840065 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.7299&lon=-119.8401&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 25230
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX86LA318
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25230/pdf
- Page: https://openairdocs.org/ntsb/LAX86LA318

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of control - in flight, circling (ifr)
  - terrain condition - uphill
  - proper glidepath - not identified, pilot in command (contributing factor)
  - light condition - daylight
  - airspeed(vmc) - not maintained, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE PILOT OF THE GLASS FUGEL GLIDER REPORTED NO MALFUNCTIONS WITH THE AIRPLANE PRIOR TO THE CRASH AFTER ATTEMPTING A CIRCLE TO LAND MANEUVER. THE PILOT INDICATED HE MISJUDGED HIS ALTITUDE WITH THE UP HILL SLOPING RUNWAY. DURING THE CIRCLING MANEUVER HE FORGOT TO FLY THE AIRPLANE AND ALLOWED THE AIRSPEED TO GET TOO LOW WHICH RESULTED IN AN INFLIGHT LOSS OF CONTROL AND SPIN INTO THE GROUND.

## Aircraft

- Registration: N7190 (not matched to a registry record)
- Reported make and model: Glasflugel STANDARD LIBELLE (STANDARD L)
- Category: Glider
- Serial number: 93
- Airframe hours: 954
- Engines: unknown
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Perry Burholm
- Registered owner: Perry Burholm
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, December 14, 1985, 52 hours before
- Airport: Q82, Alpine Co. Arpt, runway 16, 4,440 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; private; medical: class 3, valid medical--w/ waivers/lim; seat: front; flight hours: 527 total, 375 in this make and model, 37 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 3 knots
- Visibility: 60 statute miles
- Lowest ceiling: none

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19860809086629A](https://openairdocs.org/incident/19860809086629A), Aug 9, 1986: Glasfl LIBELLE, Markleeville, CA, Substantial damage. The glider spun into trees while maneuvering in the pattern. The pilot failed to monitor airspeed.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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