Atlas / NTSB / ATL81FKW18

NTSB CAROL · Event

Event ATL81FKW18

1981-04-26 TULLAHOMA, Tennessee, United States None 1 aircraft Status: Completed

Registry · N7518D

FAA Aircraft Registry record.

Make / Model

ROBINSON HELICOPTER R44 II

TCDS

H11NM · ROBINSON HELICOPTER CO

Engine

LYCOMING IO-540 SER (300 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

20031217

ADS-B equipped

Yes — Mode-S AA2134

Registrant of record

EROS AVIATION VENTURES LLC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N7518D Piper PA-22 None

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 · N7518D

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

Cruise — descent (EF)

Operator type

D

Airport

TULLAHOMA MUNI

Kind of flying

B0

Weather at impact

Sky

SCATTERED-ABOVE 1000 FEET

Wind

230° / 10 kt

Aircraft history

Serial number

0000022-5246

Total time

3,800 hrs

Pilot

Certificate

Airline transport

Total hours

61

Age

30

Probable cause (from PRE1982.MDB)

NO DISCREPANCY FOUND.

Investigator remarks

PLT & WITNESS REPORTED NOSEWHEEL/ACFT VIBRATION.

Cause factors

84/C/I C
MISCELLANEOUS UNDETERMINED Cause
88/K/94 K
MISCELLANEOUS ACTS,CONDITIONS OVERLOAD FAILURE Joint factor

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 0926. Source file NTSB_1981_3_0926.txt. Modern CAROL record on data.ntsb.gov ↗.

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