Atlas / NTSB / DEN81FTC25

NTSB CAROL · Event

Event DEN81FTC25

1981-09-27 GILLETTE, Wyoming, United States Minor 1 aircraft Status: Completed

Registry · N919X

FAA Aircraft Registry record.

Make / Model

AEROPRO CZ S R O A240

Year of manufacture

2021

Engine

ROTAX 912ULS SERIES (100 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

20220216

ADS-B equipped

Yes — Mode-S ACBA27

Registrant of record

KEMPER WILLIAM

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N919X Beech H18S Minor

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

BEECH H18S · N919X

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dusk

Weather

VMC

Phase of flight

EY

Operator type

Business

Airport

GILLETTE CAMPBELL

Kind of flying

B0

Weather at impact

Sky

OVERCAST

Wind

170° / 14 kt

Temp

58° F

Aircraft history

Serial number

000000000657

Total time

5,500 hrs

Pilot

Certificate

GA (GA)

Total hours

6,000

Age

32

Probable cause (from PRE1982.MDB)

AT APRX 0.010. NR 5 EXH VALVE SPRING BROKEN.

Investigator remarks

NR 5 EXH VALVE 0.250 CLEARANCE,ALL OTHERS NORMAL

Cause factors

74/C/AF C
POWERPLANT VALVE ASSEMBLIES Cause
88/C/47 C
MISCELLANEOUS ACTS,CONDITIONS IMPROPER ALIGNMENT/ADJUSTMENT Cause
88/C/95 C
MISCELLANEOUS ACTS,CONDITIONS MATERIAL FAILURE 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 2946. Source file NTSB_1981_3_2946.txt. Modern CAROL record on data.ntsb.gov ↗.

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