NTSB CAROL · Event
Event SEA76DYG74
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 47G-3B · N6712D
Damage
Substantial
Craft type
Balloon
Classification
Accident
Light condition
Dawn
Weather
VMC
Phase of flight
DK
Operator type
Part 135 (air taxi/commuter)
Kind of flying
CA
Weather at impact
Sky
CLEAR
Temp
78° F
Aircraft history
Serial number
000000002203
Total time
7,122 hrs
Pilot
Certificate
Flight instructor (CFI)
Total hours
6,231
Age
38
Investigator remarks
PINION SHAFT SHEARED.
Cause factors
- 78/A/BH A ROTORCRAFT TAIL ROTOR GEAR BOX Cause — pilot/personnel action
- 88/A/95 A MISCELLANEOUS ACTS,CONDITIONS MATERIAL FAILURE Cause — pilot/personnel action
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 3909.
Source file
NTSB_1976_3_3909.txt.
Modern CAROL record on
data.ntsb.gov ↗.
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