Atlas / NTSB / MKC80FCG18

NTSB CAROL · Event

Event MKC80FCG18

1980-04-02 OLATHE, Kansas, United States None 1 aircraft Status: Completed

Registry · N21399

FAA Aircraft Registry record.

Make / Model

MOONEY M20S

Year of manufacture

1999

Engine

LYCOMING 0-550-J3A5D (250 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19990618

ADS-B equipped

Yes — Mode-S A1C85C

Registrant of record

ZWIACHER JOHN W

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N21399 Piper PA-44 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-44 · N21399

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

Cruise — descent (EF)

Operator type

Personal/private

Airport

EXECUTIVE

Kind of flying

B0

Weather at impact

Sky

UNKNOWN/NOT REPORTED

Temp

55° F

Aircraft history

Serial number

0044-7995048

Total time

802 hrs

Pilot

Certificate

Flight instructor (CFI)

Total hours

825

Age

21

Probable cause (from PRE1982.MDB)

L LIMIT STATED IN MANUAL.

Investigator remarks

NOSE GEAR DRAG LINK .25IN PAST OVER CENTER TRAVE

Cause factors

68/A/D4 A
PERSONNEL INADEQUATE INSPECTION OF AIRCRAFT (MAINTENANCE PERSONNEL) Cause — pilot/personnel action
70/A/CM A
AIRFRAME GEAR LOCKING MECHANISM Cause — pilot/personnel action
88/A/BQ A
MISCELLANEOUS ACTS,CONDITIONS EXCESSIVE-WEAR/PLAY 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 1201. Source file NTSB_1980_3_1201.txt. Modern CAROL record on data.ntsb.gov ↗.

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