Atlas / NTSB / DEN72FTC09

NTSB CAROL · Event

Event DEN72FTC09

1971-10-06 JACKSON, Wyoming, United States None 1 aircraft Status: Completed

Aircraft involved

N4198D Helio H-395 None

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

HELIO H-395 · N4198D

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dusk

Weather

VMC

Phase of flight

EB

Operator type

D

Airport

JACKSONS HOLE

Kind of flying

B2

Weather at impact

Sky

CLEAR

Aircraft history

Serial number

000000000592

Total time

4,279 hrs

Pilot

Certificate

Commercial

Total hours

2,400

Age

47

Probable cause (from PRE1982.MDB)

MOUNT.PLT DIDNT ATTEMPT TO RETRACT FLAPS BFOR LDG

Investigator remarks

L FLAP FULL DWN,R FLAP 1/2 DUE ACTUATOR LOOSE AT

Cause factors

75/C/CG C
SYSTEMS WING FLAP CONTROL SYSTEM ELECTRICAL Cause
88/C/29 C
MISCELLANEOUS ACTS,CONDITIONS IMPROPERLY SECURED Cause
88/C/53 C
MISCELLANEOUS ACTS,CONDITIONS ASYMETRICAL FLAPS Cause
68/C/D6 C
PERSONNEL INADEQUATE MAINTENANCE AND INSPECTION 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 4365. Source file NTSB_1971_3_4365.txt. Modern CAROL record on data.ntsb.gov ↗.

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