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Atlas / NTSB / CHI72FEM23

NTSB CAROL · Event

Event CHI72FEM23

1971-09-04 MANISTEE, Michigan, United States None 1 aircraft Status: Completed

Registry · N10NR

FAA Aircraft Registry record.

Make / Model

BEECH B23

Year of manufacture

1968 · 3 years old at event

Engine

LYCOMING 0-360-A1D (180 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19990823

ADS-B equipped

Yes — Mode-S A00397

Registrant of record

ROBBINS WARREN N

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

BELL 47G2 · N10NR

Damage

Destroyed

Craft type

Balloon

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

DC

Operator type

H

Kind of flying

CE

Weather at impact

Sky

SCATTERED-ABOVE 1000 FEET

Aircraft history

Serial number

000000002525

Total time

1,541 hrs

Pilot

Certificate

Commercial

Total hours

2,475

Age

38

Probable cause (from PRE1982.MDB)

WHILE OVER LAKE,SKIDS CTCD WTR,LOST DRCTNL CTL.

Investigator remarks

PLT LOST RPM TACK 10 MIN PRIOR TO ACDNT,LOST RPM

Cause factors

  • 64/A/21 A
    PILOT IN COMMAND IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS Cause — pilot/personnel action
  • 64/A/18 A
    PILOT IN COMMAND FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M. Cause — pilot/personnel action
  • 76/J/AY J
    INSTRUMENTS/EQUIPMENT AND ACCESSORIES OTHER 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 3252. Source file NTSB_1971_3_3252.txt. Modern CAROL record on data.ntsb.gov ↗.