# NTSB SEA93LA141: Let Blanik L-13, N82AS, Enumclaw, WA, June 27, 1993 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: June 26, 1993, 18:00 local (Jun 27, 1993, 01:00 UTC) - Place: Enumclaw, WA - Coordinates: 47.100513, -121.599372 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=47.1005&lon=-121.5994&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report May 17, 1994 - Report: Approved by Office Director - NTSB case key (mKey): 41723 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA93LA141 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41723/pdf - Page: https://openairdocs.org/ntsb/SEA93LA141 ## Probable cause THE PILOT'S FAILURE TO ATTAIN THE PROPER TOUCHDOWN POINT. FACTORS TO THE ACCIDENT WERE: LACK OF FAMILIARITY WITH GEOGRAPHIC AREA AND THE GRASS. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water encounter with terrain/water, landing - roll - terrain condition - grass (contributing factor) - proper touchdown point - not attained, pilot in command (cause) - lack of familiarity with geographic area, pilot in command (contributing factor) ## Analysis AT THE END OF A LOCAL FAMILIARIZATION FLIGHT, THE GLIDER LANDED APPROXIMATELY 300 FEET FROM THE END OF THE RUNWAY. DURING THE LANDING ROLL, THE LEFT WING CONTACTED THE TALL GRASS NEAR THE RUNWAY EDGES AND SPUN THE GLIDER TO THE LEFT. THE RIGHT WING CONTACTED THE SURFACE AND THE GLIDER CAME TO REST 90 DEGREES FROM THE RUNWAY HEADING. NORMAL PROCEDURES FOR LANDING IS TO LAND 500 FEET OR MORE DOWN THE RUNWAY TO AVOID THE TALL GRASS NEAR THE APPROACH END. THE SECOND PILOT ON BOARD THE GLIDER REPORTED THAT WHILE ON FINAL APPROACH, HE TOLD THE PILOT IN COMMAND TO LAND FURTHER DOWN THE RUNWAY. ## Factual narrative On June 26, 1993, at 1800 hours Pacific daylight time, a LET Blanik L 13, N82AS, collided with the terrain during the landing roll at a private airstrip near Enumclaw, Washington. Visual meteorological conditions prevailed at the time and no flight plan was filed for the local flight. The glider was substantially damaged and both certificated private pilots were not injured. The second pilot reported that he was asked to fly with the pilot in command to familiarize the pilot in command with the area. The second pilot sat in the rear seat, while the pilot in command was in the front seat and in control of the flight controls for the entire flight. After the flight, a landing was set up to the east. The glider touched down approximately 300 feet from the end of the runway. During the landing roll, the left wing caught in the tall grass next to the runway and the glider spun to the left and skidded a short distance. The right wing contacted the surface and the glider came to rest approximately 90 degrees from the runway heading. The second pilot reported that touchdown is normally made at 500 feet down the runway where the grass is always kept short. The second pilot reported that he did mention this to the pilot in command while on final approach. ## Aircraft - Registration: [N82AS](https://openairdocs.org/deregistered/N82AS-2004-02-13), registration cancelled 2004-02-13, S/N 026651, built 1976 (OpenAirDocs) - Reported make and model: LET BLANIK L-13 (BLANIK L-1) - 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: 26651 - Engines: unknown - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Puget Sound Soaring Assoc. - Registered owner: Puget Sound Soaring Assoc. - Airworthiness certificate: Standard, Normal - Last inspection: Unknown, January 2, 2000 - Airport: Private, runway 9, 1,000 × 50 ft, dirt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; private; seat: front ## Weather - Conditions: Visual (VMC), Day - Wind: 220° at 5 knots - Visibility: 15 statute miles - Lowest ceiling: 3,000 ft overcast - Temperature: 61 °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 19930626020779A](https://openairdocs.org/incident/19930626020779A), Jun 26, 1993: Let L13BLANIK, Enumclaw, WA, Substantial damage. Wing caught tall grass on edge of runway on landing. Glider ground looped. ## Other investigations on N82AS (1) 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 SEA01LA153](https://openairdocs.org/ntsb/SEA01LA153), Aug 19, 2001: Let Blanik L-13 (N82AS), Enumclaw, WA, substantial damage. Probable cause: The premature release of the towline and the pilot's improper selection of a landing area following the release. Factors include improper preflight planning. 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.