NTSB CAROL · Event
Event IAD74D1A01
Registry · N21MP
FAA Aircraft Registry record.
Make / Model
BELL 47G-4A
Year of manufacture
1971 · 3 years old at event
TCDS
2H3 · SCOTT'S-BELL 47 INC
Engine
LYCOMING VO-540 SERIES (310 hp)
Seats / Engines
3 seats · 1 engine
ADS-B equipped
Yes — Mode-S A1B84A
Registrant of record
BACK JEFF
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 47G4A · N21MP
Damage
Substantial
Craft type
Balloon
Classification
Accident
Light condition
Dawn
Weather
VMC
Phase of flight
DC
Operator type
I
Airport
ANACOSTIA
Kind of flying
DL
Weather at impact
Sky
SCATTERED-ABOVE 1000 FEET
Wind
180° / 6 kt
Temp
92° F
Aircraft history
Serial number
000000007755
Total time
3,377 hrs
Pilot
Certificate
Flight instructor (CFI)
Total hours
1,563
Age
39
Probable cause (from PRE1982.MDB)
N MNTN RPM.
Investigator remarks
APCH MADE TO 10FT AGL.EXPERIENCED 2ND PWR LOSS,U
Cause factors
- 74/C/KA C POWERPLANT POWERPLANT FAILURE FOR UNDETERMINED REASONS Cause
- 64/B/27 B PILOT IN COMMAND IMPROPER IN-FLIGHT DECISIONS OR PLANNING
- 64/B/18 B PILOT IN COMMAND FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
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 1860.
Source file
NTSB_1974_3_1860.txt.
Modern CAROL record on
data.ntsb.gov ↗.
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