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Atlas / NTSB / CHI77FEE40

NTSB CAROL · Event

Event CHI77FEE40

1977-07-15 RINGWOOD, Illinois, United States None 1 aircraft Status: Completed

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

BRANTLY B2B · N2183U

Damage

Substantial

Craft type

Balloon

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

DH

Operator type

Part 135 (air taxi/commuter)

Kind of flying

CA

Weather at impact

Sky

CLEAR

Temp

78° F

Aircraft history

Serial number

000000000345

Total time

740 hrs

Pilot

Certificate

Flight instructor (CFI)

Total hours

1,185

Age

22

Probable cause (from PRE1982.MDB)

ESIDUE FOUND ON DESTROYED M/R BLADES.

Investigator remarks

1/8 INCH POLLEN BUILD-UP ON T/R BLADES. POLLEN R

Cause factors

  • 78/A/AA A
    ROTORCRAFT MAIN ROTOR BLADES Cause — pilot/personnel action
  • 78/A/AB A
    ROTORCRAFT TAIL ROTOR BLADES Cause — pilot/personnel action
  • 84/A/G A
    MISCELLANEOUS FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS 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 2824. Source file NTSB_1977_3_2824.txt. Modern CAROL record on data.ntsb.gov ↗.