20230621008479A

Accident · Substantial damage

FAA accident report · Let L-23 SUPER BLANIK · Gregory, MI · June 21, 2023

Date: June 21, 2023 · 15:34 local
Place: Gregory, MI
Phase of flight: Other, Specify
Operating rules: General operating rules (Part 91)
Damage: Substantial damage
Aircraft: N10BR
NTSB investigation: NTSBCEN23LA254
Reported as: Let L-23 Super Blanik
Reported engine: NONE NONE
People aboard: 2
Fatal injuries: 0
Other injuries: 2
Pilot’s certificates: Airline transport, commercial pilot, flight instructor
Pilot’s flight hours: 24,792 total129 in this make and model41 in the last 90 days

N10BRRegistered now · Let L-23 SUPER BLANIKS/N 917826 · Built 1991 Airframe modelLet L-23 SUPER BLANIK Engine modelNONENone

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

CFI took controls from student pilot to find thermals. CFI made decision to do off field landing.

Glider came to rest in bean field approximately half way up 30’ hill. No roll marks were observed. Nose directly impacted hillside, left wing partially sheared at aileron mid point. Left aileron stayed attached at inboard attach point. Left wing tip impacted left wing leading edge as denoted by leading edge dent and red paint marker from wing tip. Left elevator trim tab detacched at outboard attach point. Right wing and right aileron bulked at aileron mid point. Empange partially sheared behind right flap trailing edge. Empange bukled approximately 2 feet aft of shear piont. Rudder mixer bracket broken at lower attach point. Rudder cables intact. Air brakes deployed. Canopys were not jetisoned, emergency jetison handles were safetied. Forward and aft canopys were blown out, forward on rightside and aft canopy on leftside.

As the FAA filed it

CFI TOOK CONTROLS FROM STUDENT PILOT TO FIND THERMALS. CFI MADE DECISION TO DO OFF FIELD LANDING.

GLIDER CAME TO REST IN BEAN FIELD APPROXIMATELY HALF WAY UP 30’ HILL. NO ROLL MARKS WERE OBSERVED. NOSE DIRECTLY IMPACTED HILLSIDE, LEFT WING PARTIALLY SHEARED AT AILERON MID POINT. LEFT AILERON STAYED ATTACHED AT INBOARD ATTACH POINT. LEFT WING TIP IMPACTED LEFT WING LEADING EDGE AS DENOTED BY LEADING EDGE DENT AND RED PAINT MARKER FROM WING TIP. LEFT ELEVATOR TRIM TAB DETACCHED AT OUTBOARD ATTACH POINT. RIGHT WING AND RIGHT AILERON BULKED AT AILERON MID POINT. EMPANGE PARTIALLY SHEARED BEHIND RIGHT FLAP TRAILING EDGE. EMPANGE BUKLED APPROXIMATELY 2 FEET AFT OF SHEAR PIONT. RUDDER MIXER BRACKET BROKEN AT LOWER ATTACH POINT. RUDDER CABLES INTACT. AIR BRAKES DEPLOYED. CANOPYS WERE NOT JETISONED, EMERGENCY JETISON HANDLES WERE SAFETIED. FORWARD AND AFT CANOPYS WERE BLOWN OUT, FORWARD ON RIGHTSIDE AND AFT CANOPY ON LEFTSIDE.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB CEN23LA254Accident · Serious injuriesClass 3 · LimitedFinal reportGregory, MIThe flight instructor’s failure to maintain adequate airspeed and his exceedance of the glider’s critical angle of attack, leading to an aerodynamic stall during the off-field landing.Jun 21, 2023 · Substantial damage