Atlas / NTSB / FTW75FRD52

NTSB CAROL · Event

Event FTW75FRD52

1975-05-15 IOWA, Louisiana, United States Minor 1 aircraft Status: Completed

Aircraft involved

N8661H Grumman G-164A 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

GRUMMAN G-164A · N8661H

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

Cruise — descent (EF)

Operator type

Part 135 (air taxi/commuter)

Airport

O'BRIEN S FLYING

Kind of flying

CB

Weather at impact

Sky

CLEAR

Aircraft history

Serial number

000000001453

Total time

84 hrs

Pilot

Certificate

Commercial

Total hours

20,000

Age

45

Probable cause (from PRE1982.MDB)

TO LOCK R BRAKE.

Investigator remarks

R MASTER BRAKE CYL SPRING DISTORTED.CAUSED LEVER

Cause factors

70/A/CJ A
AIRFRAME BRAKING SYSTEM (NORMAL SYSTEM) Cause — pilot/personnel action
88/A/BN A
MISCELLANEOUS ACTS,CONDITIONS DISTORTED Cause — pilot/personnel action
88/A/95 A
MISCELLANEOUS ACTS,CONDITIONS MATERIAL FAILURE 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 1407. Source file NTSB_1975_3_1407.txt. Modern CAROL record on data.ntsb.gov ↗.

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