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Bulkheads (main fuselage)

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NTSB finding · Aircraft › Aircraft structures › Fuselage

All 8 cases5 in the probable cause
Cases
8
In the probable cause
5 (63%)
Fatal cases
0
NTSB code
01035312

NTSB has coded findings and defining events since 2008. Earlier cases used its older occurrence and cause codes, so they aren’t counted here.

When and where

In green, cases where NTSB made it part of the probable cause; in gray, a factor or other finding. Findings are coded with the final report, often a year or more after the event, so the latest years are incomplete.

Cases per year

2008In the probable causeFactor only2026

Where

Open the map
Query with SQL
duckdb -csv -c "SELECT year(c.\"eventDate\") AS year, count(DISTINCT f.case_mkey) AS cases,
    count(DISTINCT f.case_mkey) FILTER (WHERE f.\"inProbableCause\") AS in_probable_cause
  FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c.\"mKey\" = f.case_mkey
  WHERE starts_with(f.\"findingCode\", '01035312') AND c.\"eventDate\" >= DATE '2000-01-01'
  GROUP BY 1
  ORDER BY 1"

Prints the counts as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

In the same cases

Defining events
Aircraft models

Aircraft matched to the registry by N-number and date.

Other findings
Query with SQL
duckdb -csv -c "WITH matched AS (SELECT DISTINCT case_mkey, aircrafts_position FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' WHERE starts_with(\"findingCode\", '01035312'))
  SELECT * FROM (
  SELECT 'Defining event' AS kind, e.\"tier2Number\" AS code, max(e.\"eventTier2Name\") AS name, count(DISTINCT f.case_mkey) AS cases
  FROM matched f JOIN 'https://openairdocs.org/data/latest/ntsb_events.parquet' e ON e.case_mkey = f.case_mkey AND e.aircrafts_position = f.aircrafts_position AND e.\"isDefiningEvent\"
  WHERE e.\"tier2Number\" <> ''
  GROUP BY ALL
  UNION ALL
  SELECT 'Aircraft model', a.aircraft_model_code, any_value(concat_ws(' ', m.manufacturer, m.model)), count(DISTINCT f.case_mkey)
  FROM matched f JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = f.case_mkey AND a.position = f.aircrafts_position
  LEFT JOIN 'https://openairdocs.org/data/latest/faa_aircraft_model.parquet' m ON m.code = a.aircraft_model_code
  WHERE a.aircraft_model_code IS NOT NULL
  GROUP BY ALL
  UNION ALL
  SELECT 'Other finding', left(g.\"findingCode\", 8), max(g.\"tier4Name\"), count(DISTINCT g.case_mkey)
  FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' g
  WHERE g.case_mkey IN (SELECT case_mkey FROM matched) AND NOT starts_with(g.\"findingCode\", '01035312') AND g.\"findingCode\" GLOB '[0-9][0-9]*'
  GROUP BY ALL
  )
  QUALIFY row_number() OVER (PARTITION BY kind ORDER BY cases DESC) <= 10
  ORDER BY kind, cases DESC"

Prints the counts as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

Newest cases · 8

NTSB DCA25LA061Accident · No injuriesClass 3 · LimitedFinal reportLockheed 382G-44K-30 · St. Mary's, AKThe fatigue failure of the forward pressure bulkhead canted web that originated from stress corrosion cracking areas. Contributing to the failure were inspection procedures and intervals inadequate to identify the fatigue cracks.Dec 18, 2024 · N403LC · Substantial damageNTSB ENG24LA012IncidentClass 3 · LimitedFinal reportBritish Aerospace BAE 146 Series 200A · Missoula, MTThe use of a new long term fire retardant with a chemical composition incompatible with the retardant previously in use for the integration-operational field evaluation without adequate testing and qualification.Mar 1, 2024 · N474NA · 2 aircraft · Minor damageNTSB WPR16LA139Accident · No injuriesLimited investigationFinal reportCessna 140 · Salinas, CAThe fatigue failure of a bulkhead-skin joint that supported the main landing gear leg, which resulted in the collapse of the left main landing gear. Contributing to the failure were the non-original structural configuration of the 60-year-old airplane and the…Jul 8, 2016 · N89965 · Substantial damageNTSB DCA16LA096Accident · No injuriesLimited investigationFinal reportLockheed 382G · Iliamna, AKThe fatigue failure of the forward pressure bulkhead canted web that originated from stress corrosion cracking areas. Contributing to the failure were inspection procedures and intervals inadequate to identify the crack.Feb 12, 2016 · N401LC · Substantial damageNTSB WPR14LA134Accident · No injuriesLimited investigationFinal reportCessna 170B · San Luis Obispo, CACorrosion of the bulkhead assembly in the left main landing gearbox area, which resulted in the structural failure of the bulkhead and the subsequent landing gear collapse.Mar 7, 2014 · N2252D · Substantial damageNTSB CEN13CA289Accident · No injuriesData collectionFinal reportCessna 172S · Ankeny, IAThe student pilot's improper flare which resulted in a hard landing.May 14, 2013 · N947SP · Substantial damageNTSB ANC08CA066Accident · No injuriesData collectionFinal reportde Havilland DHC-2 · Talkeetna, AKThe pilot's inadvertent activation of the main landing gear brakes during the recovery from a bounced landing.May 11, 2008 · N323KT · Substantial damageNTSB NYC79AA106Accident · Minor injuriesClosedMcdonnell Douglas DC9 · Boston, MAa fatigue fracture of the aft cabin pressure bulkhead which resulted in a rapid decompression of the aircraft's cabin area. This fracture initiated from a crack below the aft bulkhead access door which was discernible on the X-rays taken during the aircraft's…Sep 17, 1979 · CF-TLU · Substantial damage
Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
  FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c.\"mKey\" AND a.position = 1
  WHERE c.\"mKey\" IN (SELECT f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f.\"findingCode\", '01035312'))
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.