NTSB investigations, 1998

8 cases where the phase of flight was Emergency descent.

Cases per year

19622026
NTSB investigations, 1998 per year, 1962–2026: 507 cases
19632
19645
19654
196610
19673
19686
19693
19706
19713
19722
19737
19744
19756
19763
19774
197810
19795
19804
19813
19821
19832
19848
198510
198611
19879
19884
19893
19904
19918
19924
19935
19945
19953
19963
19973
19988
19996
20005
20015
200211
20036
20045
200510
20067
20072
200814
200931
201016
201118
201218
201316
201417
201516
201615
201714
201811
20195
202010
202112
20229
202314
202415
202513
20265

Latest cases

Query with SQL
duckdb -csv -c "WITH phase_names(main, name) AS (VALUES (100, 'Prior to flight'), (150, 'Standing'), (200, 'Pushback/towing'), (250, 'Taxi'), (300, 'Takeoff'), (350, 'Initial climb'), (400, 'Enroute'), (450, 'Maneuvering'), (500, 'Approach'), (550, 'Landing'), (600, 'Emergency descent'), (650, 'Uncontrolled descent'), (700, 'Post-impact'), (750, 'After landing'), (800, 'Other'), (990, 'Unknown')),
    crosswalk(code, main, name) AS (VALUES (500, 150, 'Standing'), (501, 150, 'Standing - pre-flight'), (502, 150, 'Standing - starting engine(s)'), (503, 150, 'Standing - engine(s) operating'), (504, 150, 'Standing - engine(s) not operating'), (505, 150, 'Standing - idling rotors'), (510, 250, 'Taxi'), (511, 200, 'Taxi - pushback/tow'), (512, 250, 'Taxi - to takeoff'), (513, 250, 'Taxi - from landing'), (514, 250, 'Taxi - aerial'), (520, 300, 'Takeoff'), (521, 300, 'Takeoff - roll/run'), (522, 350, 'Takeoff - initial climb'), (523, 300, 'Takeoff - aborted'), (530, 400, 'Climb'), (531, 400, 'Climb - to cruise'), (540, 400, 'Cruise'), (541, 400, 'Cruise - normal'), (542, 400, 'Maneuvering - holding (IFR)'), (550, 400, 'Descent'), (551, 400, 'Descent - normal'), (552, 600, 'Descent - emergency'), (553, 650, 'Descent - uncontrolled'), (560, 500, 'Approach'), (561, 500, 'Approach - VFR pattern - downwind'), (562, 500, 'Approach - VFR pattern - base turn'), (563, 500, 'Approach - VFR pattern - base leg/base to final'), (564, 500, 'Approach - VFR pattern - final approach'), (565, 500, 'Go-around (VFR)'), (566, 500, 'Approach - IAF to FAF/outer marker (IFR)'), (567, 500, 'Approach - FAF/outer marker to threshold (IFR)'), (568, 500, 'Circling (IFR)'), (569, 500, 'Missed approach (IFR)'), (570, 550, 'Landing'), (571, 550, 'Landing - flare/touchdown'), (572, 550, 'Landing - roll'), (573, 550, 'Landing - aborted'), (574, 550, 'Emergency landing'), (575, 550, 'Emergency landing after takeoff'), (576, 600, 'Emergency descent/landing'), (580, 450, 'Maneuvering'), (581, 450, 'Maneuvering - aerial application'), (582, 450, 'Maneuvering - turn to reverse direction'), (583, 450, 'Maneuvering - turn to landing area (emergency)'), (590, 450, 'Hover'), (591, 450, 'Hover - in ground effect'), (592, 450, 'Hover - out of ground effect'), (600, 800, 'Other'), (610, 990, 'Unknown')),
    current_codes AS (
      SELECT e.case_mkey, TRY_CAST(e.\"tier1Number\" AS INTEGER) AS code,
        row_number() OVER (PARTITION BY e.case_mkey ORDER BY coalesce(e.\"isDefiningEvent\", false) DESC, e.position) AS n
      FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e
      WHERE e.aircrafts_position = 1 AND e.\"tier1Number\" GLOB '[1-9][0-9]*'
        AND (e.\"isDefiningEvent\" OR e.case_mkey IN (SELECT \"mKey\" FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' WHERE \"isPre1982\"))
    ),
    phases AS (
      SELECT case_mkey, 'current' AS scheme, code, CASE WHEN code >= 990 THEN 990 ELSE code // 50 * 50 END AS main
      FROM current_codes WHERE n = 1
      UNION ALL
      SELECT o.case_mkey, 'older', o.\"phaseOfFlightCode\", w.main
      FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o JOIN crosswalk w ON w.code = o.\"phaseOfFlightCode\"
      WHERE o.aircrafts_position = 1 AND o.\"occurrenceNumber\" = 1 AND o.case_mkey NOT IN (SELECT case_mkey FROM current_codes)
    ),
    case_phases AS (
      SELECT p.*, c.\"eventDate\", c.\"highestInjuryLevel\" = 'Fatal' AS fatal, a.aircraft_model_code
      FROM phases p JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c.\"mKey\" = p.case_mkey
      LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = p.case_mkey AND a.position = 1
      WHERE c.\"eventDate\" >= DATE '1962-01-01' AND p.main IN (SELECT main FROM phase_names)
    )
  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 year(c.\"eventDate\") = 1998
    AND c.\"mKey\" IN (SELECT case_mkey FROM case_phases WHERE main = 600)
  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.

NTSB FTW99LA017Accident · Serious injuriesLimited investigationFinal reportGrumman American AA-5A · Scott, ARThe disengagement of the crankshaft gear due to the maintenance personnel not installing the gear lockplate at the last engine overhaul, resulting in the loosening of the gear retaining bolt, and the subsequent fracture of the gear alignment dowel. A factor…Oct 29, 1998 · N9956U · Substantial damageNTSB FTW98LA347Accident · Serious injuriesLimited investigationFinal reportCessna 152 · Hayes, LAThe forced landing for undetermined reasons. A factor was no suitable terrain for the forced landing.Aug 9, 1998 · N69269 · Substantial damageNTSB FTW98LA357Accident · Minor injuriesLimited investigationFinal reportCessna 150J · Belen, NMThe pilot's improper preflight in that he failed to drain the water from the fuel sumps. Factors were water contamination in the fuel tank and a sand bar.Aug 7, 1998 · N60564 · Substantial damageNTSB CHI98LA303Accident · Minor injuriesLimited investigationFinal reportCook Teenie TWO · Stevensville, MIThe pilot's inadequate preflight planning and preparation which resulted in fuel exhaustion and subsequent loss of engine power.Jul 18, 1998 · N40512 · Substantial damageNTSB LAX98LA230Accident · No injuriesLimited investigationFinal reportPiper PA-18-150 · Hyampom, CAInadequate annual inspection that resulted in a partial loss of engine power due to a missing bolt, nut, and cotter pin from the throttle/carburetor assembly.Jul 12, 1998 · N6248R · Substantial damageNTSB FTW98FA157Accident · Serious injuriesField investigationFinal reportCessna T207A · Monument Valley, UTThe engine's total power loss due to the induction air ducting separating because of inadequate maintenance by company personnel. Factors were the failure of the manufacturer to provide non-standard operating procedures in their airplane's information manual,…Mar 24, 1998 · N73780 · Substantial damageNTSB FTW98LA154Accident · Minor injuriesLimited investigationFinal reportGrumman American AA-1B · Tulsa, OKThe complete loss of engine power for an undetermined reason. A factor was the lack of suitable terrain for the forced landing.Mar 22, 1998 · N9940L · Substantial damageNTSB NYC98LA068Accident · No injuriesLimited investigationFinal reportZwart KIT FOX Vixen · Weyers Cave, VAThe failure of the propeller drive train after the pilot/builder installed an improper drive belt.Feb 22, 1998 · N955F · Substantial damage