# NTSB investigations, 1998: Unknown

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB NYC99FA007](https://openairdocs.org/ntsb/NYC99FA007.md): Cessna 172G · Bennington, VT · Accident · 2 fatal · Field investigation · Final report · Oct 12, 1998 · N1330F · Destroyed
  > The pilot's VFR flight into IMC. Contributing factors were the pilot's lack of recent experience, mountainous/hilly terrain, and clouds.
- [NTSB CHI99LA009](https://openairdocs.org/ntsb/CHI99LA009.md): Cessna 150F · Muskegon, MI · Accident · No injuries · Limited investigation · Final report · Oct 5, 1998 · N8655S · Substantial damage
  > poor in-flight planning by an unqualified person which resulted in fuel exhaustion. A factor was the swamp in which the forced landing was made.
- [NTSB ANC99LA005](https://openairdocs.org/ntsb/ANC99LA005.md): Beech G-35 · Neah Bay, WA · Accident · 1 fatal · Limited investigation · Final report · Oct 4, 1998 · N4479D · Destroyed
  > Undetermined. Missing Aircraft.
- [NTSB ANC98FA168](https://openairdocs.org/ntsb/ANC98FA168.md): Cessna TU-206G · Ketchikan, AK · Accident · 1 fatal · Field investigation · Final report · Sep 29, 1998 · N4820U · Destroyed
  > The pilot's continued VFR flight into instrument meteorological conditions. Contributing factors were low ceilings and mountainous/hilly terrain.
- [NTSB ANC98FA152](https://openairdocs.org/ntsb/ANC98FA152.md): Cessna 207 · Kotzebue, AK · Accident · 1 fatal · Field investigation · Final report · Sep 17, 1998 · N1809Q · Destroyed
  > The pilot's continued VFR flight into instrument meteorological conditions. Factors associated with the accident were low ceilings, mountainous/hilly terrain features, rain, and fog.
- [NTSB MIA98LA242](https://openairdocs.org/ntsb/MIA98LA242.md): Cessna 177RG · Covington, GA · Accident · No injuries · Limited investigation · Final report · Sep 5, 1998 · N2679V · Substantial damage
  > slippage of the No. 3 connecting rod bearing resulting in blockage of the oil port, oil starvation, and subsequent connecting rod failure. A factor was the fence.
- [NTSB ATL98FAMS1](https://openairdocs.org/ntsb/ATL98FAMS1.md): Piper PA-28-181 · Missing · Accident · 4 fatal · Missing aircraft · Final report · Aug 18, 1998 · N25626 · Destroyed
  > The aircraft is missing.
- [NTSB FTW98FA340](https://openairdocs.org/ntsb/FTW98FA340.md): Piper J3C-85 · Seminole, TX · Accident · 1 fatal · Field investigation · Final report · Jul 31, 1998 · N7018H · Destroyed
  > The pilot's failure to maintain aircraft control.
- [NTSB CHI98LA368](https://openairdocs.org/ntsb/CHI98LA368.md): Grumman American AA-5B · Deadwood, SD · Accident · 2 fatal · Limited investigation · Final report · Jul 26, 1998 · N4535P · Destroyed
  > The pilot's failure to maintain adequate clearance from the trees.
- [NTSB SEA98LA145](https://openairdocs.org/ntsb/SEA98LA145.md): Baggarley Glasair II-FT · Vernonia, OR · Accident · 1 fatal · Limited investigation · Final report · Jul 20, 1998 · N31066 · Substantial damage
  > A loss of aircraft control for undetermined reasons.
- [NTSB FTW98FA307](https://openairdocs.org/ntsb/FTW98FA307.md): Cessna 172N · Lincoln, TX · Accident · Serious injuries · Field investigation · Final report · Jul 11, 1998 · N5632E · Destroyed
  > The #3 cylinder exhaust valve rocker arm fulcrum retaining stud backing out of its stud-tapped hole due to the improper tapping of the stud hole by unknown maintenance personnel. Contributing factors were the transmission wire, sign and gasoline pump.
- [NTSB MIA99FA050](https://openairdocs.org/ntsb/MIA99FA050.md): Cessna 172L · Macclenny, FL · Accident · 2 fatal · Field investigation · Final report · Jun 23, 1998 · N3853Q · Destroyed
  > The student pilot's attempted VFR flight into instrument meteorological conditions, resulting in a subsequent in-flight collision with trees and terrain. Contributing factors were, haze/smoke, the student pilot's failure to obtain a preflight weather…
- [NTSB NYC98FA107](https://openairdocs.org/ntsb/NYC98FA107.md): Ercoupe ERCO-415C · New Lisbon, NY · Accident · 2 fatal · Field investigation · Final report · May 16, 1998 · N3230H · Destroyed
  > Detonation within the No. 2 cylinder resulting in melting and breaching of the piston, and the pilot's selection of unsuitable terrain for landing. Contributing factors were the uphill terrain encountered during the landing and the visual perception…
- [NTSB ANC98FA043](https://openairdocs.org/ntsb/ANC98FA043.md): Taylorcraft BL12 · Sitka, AK · Accident · 1 fatal · Field investigation · Final report · Apr 28, 1998 · N33902 · Destroyed
  > The pilot's attempted VFR flight into instrument meteorological conditions. Contributing factors were clouds, the pilot's lack of instrument flight experience, obscuration and mountainous terrain.
- [NTSB ATL98FA063](https://openairdocs.org/ntsb/ATL98FA063.md): William Sargent Lancair 235 · Newport, TN · Accident · 2 fatal · Field investigation · Final report · Apr 17, 1998 · N813Y · Destroyed
  > The pilot's attempt to operate in instrument meteorological conditions and his failure to maintain clearance with the surrounding terrain. Contributing factors were clouds and the mountainous/hilly terrain.
- [NTSB SEA98FA101](https://openairdocs.org/ntsb/SEA98FA101.md): Piper PA-46-350P · Bigfork, MT · Accident · 2 fatal · Field investigation · Final report · Apr 11, 1998 · N9247W · Destroyed
  > The pilot's failure to maintain terrain clearance for undetermined reasons. Contributing factors were the mountainous terrain, trees, dark night conditions, clouds and pilot fatigue.
- [NTSB ANC98GA036](https://openairdocs.org/ntsb/ANC98GA036.md): Cessna 185F · Nightmute, AK · Accident · 2 fatal · Final report · Apr 9, 1998 · N5485R · Destroyed
  > The pilot's continued VFR flight into instrument meteorological conditions which resulted in spatial disorientation and subsequent loss of aircraft control. Factors in the accident were meteorological conditions consisting of low ceilings, and blowing snow,…
- [NTSB FTW98FA167](https://openairdocs.org/ntsb/FTW98FA167.md): Bell 206B · Round Top, TX · Accident · 1 fatal · Field investigation · Final report · Apr 2, 1998 · N7734A · Destroyed
  > The pilot's attempted VFR flight into instrument meteorological conditions. Contributing factors were fog, low ceilings, and trees.
- [NTSB MIA98FAMS2](https://openairdocs.org/ntsb/MIA98FAMS2.md): Cessna 182H · Missing · Accident · 1 fatal · Missing aircraft · Final report · Mar 28, 1998 · N8460S · Destroyed
  > Undetermined.
- [NTSB CHI98FA099](https://openairdocs.org/ntsb/CHI98FA099.md): Cessna T210L · Orleans, IN · Accident · 1 fatal · Field investigation · Final report · Mar 5, 1998 · N2546S · Destroyed
  > The pilot's attempted VFR flight into instrument meteorological conditions and his subsequent failure to maintain clearance with trees. Contributing factors were the pilot's impairment from prescription drugs, low ceilings, fog, trees, and hilly terrain.

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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 = 990)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/990/cases?year=1998

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.