NTSB CAROL · Event
Event DEN74AD045
Registry · N8490D
FAA Aircraft Registry record.
Make / Model
ROBINSON HELICOPTER R22 ALPHA
Year of manufacture
1984
TCDS
H10WE · ROBINSON HELICOPTER CO
Engine
LYCOMING 0-320 SERIES (180 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
19840418
ADS-B equipped
Yes — Mode-S ABA3A4
Registrant of record
LITTLE BIG HORN CO
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
PIPER PA-22 · N8490D
Damage
Destroyed
Craft type
Airplane
Classification
Accident
Light condition
Dawn
Weather
VMC
Phase of flight
D0
Operator type
D
Kind of flying
B0
Weather at impact
Sky
SCATTERED-ABOVE 1000 FEET
Wind
140° / 6 kt
Temp
39° F
Aircraft history
Serial number
0000022-5717
Total time
1,645 hrs
Pilot
Certificate
Commercial — instrument
Total hours
227
Age
34
Probable cause (from PRE1982.MDB)
G TERRAIN.RCVRD 3/24/74.STUDENT PLT R SEAT.
Investigator remarks
ENTRD NARROW CANYON OVR GWT.UN TO OUTCLIMB RISIN
Cause factors
- 64/A/29 A PILOT IN COMMAND INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING Cause — pilot/personnel action
- 64/A/27 A PILOT IN COMMAND IMPROPER IN-FLIGHT DECISIONS OR PLANNING Cause — pilot/personnel action
- 83/J/I J TERRAIN HIGH OBSTRUCTIONS Joint cause
- 88/J/76 J MISCELLANEOUS ACTS,CONDITIONS IMPROPERLY LOADED AIRCRAFT-WEIGHT-AND/OR C.G. 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 0657.
Source file
NTSB_1974_3_0657.txt.
Modern CAROL record on
data.ntsb.gov ↗.
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