# NTSB investigations, 1996: 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 MIA97FA043](https://openairdocs.org/ntsb/MIA97FA043.md): Forney F-1 · Middleburg, FL · Accident · 1 fatal · Field investigation · Final report · Dec 22, 1996 · N7530C · Destroyed
  > VFR flight by the noninstrument-rated pilot into instrument meteorological conditions (IMC), which resulted in spatial disorientation and an uncontrolled descent into a wooded area. Factors relating to the accident were: failure of the pilot to obtain a…
- [NTSB FTW97LA047](https://openairdocs.org/ntsb/FTW97LA047.md): Cessna 182E · Alamosa, CO · Accident · No injuries · Limited investigation · Final report · Nov 12, 1996 · N3293Y · Substantial damage
  > aircraft damage for undetermined rteasons.
- [NTSB CHI97FA024](https://openairdocs.org/ntsb/CHI97FA024.md): Cessna 177B · Chancellor, SD · Accident · 1 fatal · Field investigation · Final report · Nov 5, 1996 · N34994 · Destroyed
  > the pilot's attempted flight with known deficiencies in equipment, his initiating VFR flight into IMC conditions, his spatial disorientation and loss of control of the airplane. Factors were fog, dark night, and inoperative directional gyro.
- [NTSB SEA97FA016](https://openairdocs.org/ntsb/SEA97FA016.md): Robinson R22 Beta · Halsey, OR · Accident · 1 fatal · Field investigation · Final report · Oct 19, 1996 · N512HH · Destroyed
  > The pilot-in-command's failure to maintain main rotor RPM, resulting in loss of control of the helicopter and collision with terrain. Factors included the pilot's lack of experience in helicopters, and interpersonal relationship problems between the pilot and…
- [NTSB LAX97LA013](https://openairdocs.org/ntsb/LAX97LA013.md): Piper PA-28-181 · San Diego, CA · Accident · Serious injuries · Limited investigation · Final report · Oct 12, 1996 · N2501X · Destroyed
  > the student pilot's impairment of judgment and performance due to alcohol, his subsequent flight into adverse weather conditions, and his failure to maintain clearance from obstructions (power lines). Factors related to the accident were: darkness, low…
- [NTSB CHI96LA352](https://openairdocs.org/ntsb/CHI96LA352.md): Cessna 172RG · Aurora, IL · Accident · No injuries · Limited investigation · Final report · Sep 17, 1996 · N966LA · Substantial damage
  > undetermined.
- [NTSB CHI96FA334](https://openairdocs.org/ntsb/CHI96FA334.md): Thocker RV-4 · Muncie, IN · Accident · 2 fatal · Field investigation · Final report · Sep 17, 1996 · N952JT · Destroyed
  > was the in-flight disconnection of the horizontal and vertical stabilizer forward attachments.
- [NTSB NYC96FA182](https://openairdocs.org/ntsb/NYC96FA182.md): Piper PA-28-140 · Frankford Twnsp, NJ · Accident · 1 fatal · Field investigation · Final report · Sep 7, 1996 · N422FL · Destroyed
  > the pilot's inadequate preflight planning/preparation by not obtaining a preflight weather briefing, his VFR flight into instrument meteorological conditions (IMC), and his failure to maintain control of the aircraft after becoming spatial disoriented.…
- [NTSB CHI96FA301](https://openairdocs.org/ntsb/CHI96FA301.md): Bellanca 7GCAA · Hinckley, IL · Accident · 2 fatal · Field investigation · Final report · Aug 19, 1996 · N5026Q · Destroyed
  > the instructor pilot exceeded the design stress limits of the aircraft which resulted in the overload failure of the wing. A factor was that the weight and balance of the aircraft was exceeded by the instructor pilot.
- [NTSB ANC96FAMS1](https://openairdocs.org/ntsb/ANC96FAMS1.md): Grumman G21-G · Dutch Harbor, AK · Accident · 2 fatal · Missing aircraft · Final report · Aug 12, 1996 · N660PA · Destroyed
  > Undetermined.
- [NTSB SEA96FA170](https://openairdocs.org/ntsb/SEA96FA170.md): Piper PA-28R-200 · Libby, MT · Accident · 3 fatal · Field investigation · Final report · Jul 26, 1996 · N3071R · Destroyed
  > collision with rising mountainous terrain for unknown reason(s).
- [NTSB MIA96FA186](https://openairdocs.org/ntsb/MIA96FA186.md): Cessna 152 · New Smyrna Bch, FL · Accident · 1 fatal · Field investigation · Final report · Jul 15, 1996 · N65514 · Destroyed
  > the pilot's impairment of judgment and performance because of gastroenteritis and use of the prescription drug Phenergan (promethazine).
- [NTSB SEA96LA164](https://openairdocs.org/ntsb/SEA96LA164.md): Piper PA-46-350P · Hillsboro, OR · Accident · No injuries · Limited investigation · Final report · Jul 8, 1996 · N58VJ · Substantial damage
  > blockage of the vents to both wing fuel tanks, after unknown personnel failed to remove tape (protective covering) from the vents, which resulted in collapsed fuel tanks (and wing damage).
- [NTSB LAX96LA247](https://openairdocs.org/ntsb/LAX96LA247.md): Cessna R172K · Oroville, CA · Accident · Serious injuries · Limited investigation · Final report · Jun 26, 1996 · N1133V · Substantial damage
  > undetermined.
- [NTSB ATL96FA094](https://openairdocs.org/ntsb/ATL96FA094.md): Cessna 172N · Arlington, TN · Accident · 1 fatal · Field investigation · Final report · Jun 14, 1996 · N73941 · Substantial damage
  > The pilot's failure to maintain clearance above the trees. A factor was the dark night.
- [NTSB ANC96FA081](https://openairdocs.org/ntsb/ANC96FA081.md): Robinson R-22 Mariner · Mekoryuk, AK · Accident · 1 fatal · Field investigation · Final report · Jun 4, 1996 · N113CF · Destroyed
  > A loss of engine power due to fuel contamination found in the fuel supply and helicopter fuel system. Factors in the accident were the pilot's inadequate filtration (servicing of the helicopter) of the fuel supply, and the pilot's inadequate performance of…
- [NTSB ANC96FA079](https://openairdocs.org/ntsb/ANC96FA079.md): Republic RC-3 Seabee · Ketchikan, AK · Accident · 2 fatal · Field investigation · Final report · May 25, 1996 · N99FJ · Destroyed
  > the airplane crashed for undetermined reason(s).
- [NTSB ATL96FAMS1](https://openairdocs.org/ntsb/ATL96FAMS1.md): Aero Commander 500-B · Missing · Accident · 3 fatal · Missing aircraft · Final report · May 2, 1996 · N50GV · Destroyed
  > Undetermined.
- [NTSB FTW96LA106](https://openairdocs.org/ntsb/FTW96LA106.md): Bellanca 17-30A · Belen, NM · Accident · No injuries · Limited investigation · Final report · Jan 13, 1996 · N4109B · Substantial damage
  > previous damage, looseness of the main landing gear, and inadequate maintenance.

## 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") = 1996
  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=1996

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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.