NTSB CAROL · Event
Event MKC73DER15
Registry · N9059M
FAA Aircraft Registry record.
Make / Model
CESSNA 180H
Year of manufacture
1970 · 2 years old at event
Engine
CONT MOTOR O-470 SERIES (230 hp)
Seats / Engines
6 seats · 1 engine
Last airworthiness date
19700714
ADS-B equipped
Yes — Mode-S AC855E
Registrant of record
MORTVEDT ARTHUR D TRUSTEE
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Historical record (pre-1982)
NTSB recorded this accident in the pre-1982 coded-field schema — structured fields rather than free-text narrative. Decoded codes use established NTSB single-letter taxonomies; cause factors remain verbatim pending the Form 6120.4 codebook lookup.
Aircraft
CESSNA 180H · N9059M
Damage
Substantial
Craft type
Airplane
Classification
Accident
Light condition
Dawn
Weather
VMC
Phase of flight
C0
Operator type
Business
Kind of flying
B2
Weather at impact
Sky
CLEAR
Aircraft history
Serial number
000018052159
Total time
208 hrs
Pilot
Certificate
Flight instructor (CFI)
Total hours
2,000
Age
43
Probable cause (from PRE1982.MDB)
SANK.
Investigator remarks
APRX 1/2IN DIAM HOLE IN REAR OF LEFT FLOAT.ACFT
Cause factors
- 64/A/29 A PILOT IN COMMAND INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING Cause — pilot/personnel action
- 70/A/CH A AIRFRAME FLOAT ASSEMBLIES Cause — pilot/personnel action
- 88/A/AJ A MISCELLANEOUS ACTS,CONDITIONS LEAK/LEAKAGE Cause — pilot/personnel action
- 83/J/G J TERRAIN ROUGH WATER Joint cause
- 88/J/88 J MISCELLANEOUS ACTS,CONDITIONS AIRCRAFT CAME TO REST IN WATER Joint cause
Decoded against the NTSB Form 6120.4 cause-factor codebook (ct_Pre1982 table). Each row shows the raw triplet, modifier (Cause / Factor / etc.), category, and specific code.
Source: NTSB pre-1982 historical archive. Docket
3 1325.
Source file
NTSB_1972_3_1325.txt.
Modern CAROL record on
data.ntsb.gov ↗.
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