NTSB CAROL · Event
Event ANC23LA063
Registry · N4891Z
FAA Aircraft Registry record.
Make / Model
CESSNA U206G
Year of manufacture
1980 · 43 years old at event
TCDS
A4CE · CESSNA
Engine
CONT MOTOR IO 520 SERIES (285 hp)
Seats / Engines
6 seats · 1 engine
Last airworthiness date
19930504
ADS-B equipped
Yes — Mode-S A60C9B
Registrant of record
RUSTAIR INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The airplane’s float contacted an undetected submerged gravel bar during landing which resulted in a nose over.
Factual narrative
While landing on a river and coming off the float step, the airplane’s float contacted an undetected submerged gravel bar in shallow water. The airplane pivoted, nosed over, and came to rest inverted. The airplane sustained substantial damage to the vertical stabilizer and rudder. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).
- — Environmental issues-Physical environment-Runway/land/takeoff/taxi surface-(general)-Contributed to outcome
- — Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot
- — Environmental issues-Physical environment-Runway/land/takeoff/taxi surface-(general)-Awareness of condition
Verbatim from NTSB's published report. Source file
NTSB_2023_ANC23LA063.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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