NTSB CAROL · Event
Event DEN77FA019
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
SIKORSKY S-64E · N6965R
Damage
Substantial
Craft type
Balloon
Classification
Accident
Light condition
Dawn
Weather
VMC
Phase of flight
D9
Operator type
Y
Kind of flying
CK
Weather at impact
Sky
CLEAR
Aircraft history
Serial number
000000064060
Total time
5,396 hrs
Pilot
Certificate
Commercial
Total hours
4,584
Age
35
Probable cause (from PRE1982.MDB)
RVO REVERSED HYD LEAK DEVELOPED IN FLIGHT
Investigator remarks
PRESSURE AND RETURN HYD LINES TO LEFT LATERAL SE
Cause factors
- 64/A/29 A PILOT IN COMMAND INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING Cause — pilot/personnel action
- 68/A/D6 A PERSONNEL INADEQUATE MAINTENANCE AND INSPECTION Cause — pilot/personnel action
- 75/A/CL A SYSTEMS FLIGHT CONTROL BOOST SYSTEMS, HYDRAULIC Cause — pilot/personnel action
- 88/A/CB A MISCELLANEOUS ACTS,CONDITIONS IMPROPERLY INSTALLED Cause — pilot/personnel action
- 75/A/BD A SYSTEMS RESERVOIR,LINES,FITTINGS Cause — pilot/personnel action
- 88/A/AJ A MISCELLANEOUS ACTS,CONDITIONS LEAK/LEAKAGE Cause — pilot/personnel action
- 88/A/AV A MISCELLANEOUS ACTS,CONDITIONS LOOSE,PART/FITTING 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 4084.
Source file
NTSB_1976_3_4084.txt.
Modern CAROL record on
data.ntsb.gov ↗.
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