# NTSB LAX84LA091: Let L-13, N711KR, Jacumba, CA, December 3, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: December 3, 1983, 15:00 local (23:00 UTC)
- Place: Jacumba, CA
- Location: 32.6159° N, 116.1655° W: Placed by OpenAirDocs at JACUMBA (L78), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.6159&lon=-116.1655&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 24111
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX84LA091
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/24111/pdf
- Page: https://openairdocs.org/ntsb/LAX84LA091

## Sequence of events

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

- In flight collision with object, landing - flare/touchdown
  - object - tree(s) (contributing factor)
  - compensation for wind conditions - improper, pilot in command (cause)
  - weather condition - high wind (contributing factor)
  - planned approach - inadequate, pilot in command (cause)
  - clearance - misjudged, pilot in command (cause)
- Undershoot, landing - flare/touchdown
  - descent - misjudged, pilot in command (cause)
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - not corrected, pilot in command (cause)

## Analysis

THE ACFT COLLIDED WITH A BUSH AND GROUNDLOOPED SHORT OF THE RWY. THE WIND WAS UNUSUALLY STRONG AND THE GLIDER PLT STATED HE MISJUDGED ITS EFFECT AND SHOULD HAVE FLOWN THE BASE LEG CLOSER. THE ACFT LANDED SHORT OF THE RWY AND GROUND LOOPED.

## Aircraft

- Registration: [N711KR](https://openairdocs.org/deregistered/N711KR-2012-06-28), registration cancelled 2012-06-28, S/N 175127, built 1972 (OpenAirDocs)
- Reported make and model: LET L-13
- Registry model: [Let BLANIK L-13](https://openairdocs.org/model/let-blanik-l-13) (registry code 1360306) (OpenAirDocs)
- Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs)
- Category: Glider
- Serial number: 175-127
- Airframe hours: 727
- Engines: unknown
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Agcsc
- Registered owner: Anita And David Reith
- Airworthiness certificate: Standard, Aerobatic
- Last inspection: Annual, July 22, 1983, 5 hours before
- Airport: L78, Jacumba, runway 27, 2,985 × 133 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; private; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 297 total, 71 in this make and model, 198 as pilot in command, 7 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 225° at 30 knots, gusting 50
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 50 °F

## 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 19831203059809A](https://openairdocs.org/incident/19831203059809A), Dec 3, 1983: Let L13BLANIK, Jacumba, CA, Substantial damage. Glider pilot misjudged winds and glider struck bush short of runway causing crash.

## Other investigations on N711KR (3)

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.

- [NTSB NYC02LA092](https://openairdocs.org/ntsb/NYC02LA092), May 5, 2002: Blanik L-13 (N711KR), Saratoga Spring, NY, substantial damage. Probable cause: The glider encountering an unanticipated downdraft, which resulted in insufficient altitude to reach a suitable landing area.
- [NTSB SEA91LA147](https://openairdocs.org/ntsb/SEA91LA147), Jul 1, 1991: Let L-13 (N711KR), Driggs, ID, substantial damage. Probable cause: THE PILOT MISJUDGED HIS DISTANCE AND ALTITUDE TO THE RUNWAY DURING THE APPROACH AND FAILED TO ATTAIN THE PROPER TOUCHDOWN POINT FOR LANDING. HIS LACK OF EXPERIENCE IN THE MAKE AND MODEL OF GLIDER WAS…
- [NTSB FTW73AF016](https://openairdocs.org/ntsb/FTW73AF016), Nov 5, 1972: Blanik L-13 (N711KR), Friendswood, TX, substantial damage

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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