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ERA11CA087

2010-12-11 · Aberdeen, Maryland, United States · Minor · 1 aircraft · Status: Completed

Airport 0W3

Current FAA registration · N91896

Make / Model
SCHWEIZER SGS 1-23D
Year of manufacture
1955 · 55 years old at event
Engine
NONE NONE
Seats / Engines
1 seats · 1 engine
Last airworthiness date
19570122
ADS-B equipped
Yes — Mode-S ACB815

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's loss of control during an intentional aerobatic maneuver (spin) resulting in a collision with trees.

Factual narrative

According to the pilot of the glider, on his second flight of the day, he initiated a spin to the right around 3,200 feet. After approximately three-quarters of a turn, the pilot attempted to recover from the spin by applying left rudder. The pilot stated that he felt no resistance upon application of the rudder, and that the glider was unresponsive. As he neared the ground, the pilot was able to maneuver toward trees. The glider impacted a tree, resulting in substantial damage to the wings. The glider remained in the tree for several days due to snow and ice storms before it could be recovered. Post accident examination by a Federal Aviation Administration Inspector revealed that the rudder turnbuckles were set per the manual and the rudder return springs were intact and not stretched. The rudder controls functioned properly when manipulated. According to the pilot, on his second flight of the day, he initiated a spin to the right around 3,200 feet. After approximately three-quarters of a turn, he attempted to recover from the spin by applying left rudder. He felt no resistance upon application of the rudder and the glider felt unresponsive. As he neared the ground, the pilot was able to maneuver toward trees. The glider impacted a tree, resulting in substantial damage to the wings. The glider remained in the tree for several days due to snow and ice storms before it could be recovered. A postaccident examination by a Federal Aviation Administration inspector revealed that the rudder turnbuckles were set per the maintenance manual and the rudder return springs were intact and not stretched. The rudder controls functioned properly when manipulated. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • C Personnel issues-Action/decision-Action-Incorrect action performance-Pilot - C
  • C Aircraft-Aircraft oper/perf/capability-(general)-(general)-Not attained/maintained - C

Verbatim from NTSB's published report. Source file NTSB_2010_ERA11CA087.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

Matched on aircraft type or causal vocabulary (loss of control, maintenance). All research papers