# NTSB investigations, TN: Uncontrolled descent

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 CHI07FA046](https://openairdocs.org/ntsb/CHI07FA046.md): Rockwell International 114 · Jasper, TN · Accident · 2 fatal · Field investigation · Final report · Dec 26, 2006 · N55MB · Substantial damage
  > The pilot's inability to maintain altitude due to excessive airframe ice accretion, resulting in an in-flight collision with trees and terrain. Additional causes were the pilot's continued flight in icing conditions once they had been encountered, and his…
- [NTSB ATL81FA100](https://openairdocs.org/ntsb/ATL81FA100.md): Piper PA-24 · Center Grove, TN · Accident · 4 fatal · Closed · Jul 23, 1981 · N5472P · Destroyed
- [NTSB MKC81FA012](https://openairdocs.org/ntsb/MKC81FA012.md): Beech F35 · Paris, TN · Accident · No injuries · Closed · Jan 1, 1981 · N266S · Substantial damage
- [NTSB ATL81FA021](https://openairdocs.org/ntsb/ATL81FA021.md): Cessna T210N · Tazewell, TN · Accident · 4 fatal · Closed · Dec 2, 1980 · N4846C · Destroyed
- [NTSB ATL80FA065](https://openairdocs.org/ntsb/ATL80FA065.md): Piper PA-23 · Rockford, TN · Accident · 5 fatal · Closed · Jul 3, 1980 · N6087Y · Destroyed
- [NTSB IAD80FA002](https://openairdocs.org/ntsb/IAD80FA002.md): Mooney M20J · Pikeville, TN · Accident · 2 fatal · Closed · Oct 4, 1979 · N201YY · Destroyed
- [NTSB IAD79FKW14](https://openairdocs.org/ntsb/IAD79FKW14.md): Schleicher KA8B · Benton, TN · Accident · No injuries · Closed · May 26, 1979 · N170DR · Destroyed
- [NTSB IAD79FA008](https://openairdocs.org/ntsb/IAD79FA008.md): Cessna 310I · Portland, TN · Accident · 2 fatal · Closed · Nov 7, 1978 · N8037M · Destroyed
- [NTSB IAD78FA018](https://openairdocs.org/ntsb/IAD78FA018.md): Cessna 172H · Dickson, TN · Accident · 2 fatal · Closed · Dec 4, 1977 · N75923 · Destroyed
- [NTSB IAD77FA064](https://openairdocs.org/ntsb/IAD77FA064.md): Piper PA-28 · Harriman, TN · Accident · 2 fatal · Closed · Sep 5, 1977 · N32044 · Destroyed
- [NTSB IAD76AI044](https://openairdocs.org/ntsb/IAD76AI044.md): Bellanca 17-31 · Butler, TN · Accident · 4 fatal · Closed · Dec 25, 1975 · N14707 · Destroyed
- [NTSB IAD75AI034](https://openairdocs.org/ntsb/IAD75AI034.md): Piper PA-28R · Toone, TN · Accident · 3 fatal · Closed · Nov 30, 1974 · N5092S · Destroyed
- [NTSB IAD75AI012](https://openairdocs.org/ntsb/IAD75AI012.md): Cessna A188B · Smyrna, TN · Accident · 1 fatal · Closed · Sep 13, 1974 · N53235 · Destroyed
- [NTSB IAD74AI021](https://openairdocs.org/ntsb/IAD74AI021.md): Cessna 172 · Lewisburg, TN · Accident · 1 fatal · Closed · Oct 13, 1973 · N7108T · Destroyed
- [NTSB MIA73DKW11](https://openairdocs.org/ntsb/MIA73DKW11.md): Cessna 177 · Flagpond, TN · Accident · Serious injuries · Closed · Nov 25, 1972 · N2360Y · Substantial damage
- [NTSB MIA72AM080](https://openairdocs.org/ntsb/MIA72AM080.md): Cessna 182D · Morrison, TN · Accident · 2 fatal · Closed · Feb 13, 1972 · N9044X · Destroyed
- [NTSB MIA72AM015](https://openairdocs.org/ntsb/MIA72AM015.md): Cessna 421A · Athens, TN · Accident · 2 fatal · Closed · Aug 20, 1971 · N3198K · Destroyed
- [NTSB MIA71AM110](https://openairdocs.org/ntsb/MIA71AM110.md): Piper PA-28 · Murfreesboro, TN · Accident · 2 fatal · Closed · Jun 9, 1971 · N5115L · Destroyed
- [NTSB MIA71AM028](https://openairdocs.org/ntsb/MIA71AM028.md): Beech 23 · Gates, TN · Accident · 2 fatal · Closed · Sep 18, 1970 · N2331Q · Destroyed
- [NTSB MIA71AM006](https://openairdocs.org/ntsb/MIA71AM006.md): Piper PA-28 · Hillsboro, TN · Accident · 1 fatal · Closed · Jul 9, 1970 · N7223F · Destroyed
- [NTSB MIA70AM066](https://openairdocs.org/ntsb/MIA70AM066.md): Piper PA-24 · Tellico Plns, TN · Accident · 2 fatal · Closed · Feb 9, 1970 · N8321P · Destroyed
- [NTSB MIA69F0341](https://openairdocs.org/ntsb/MIA69F0341.md): Bell 47G-3B · Kingsport, TN · Accident · Minor injuries · Closed · Jan 18, 1969 · N204Z · Destroyed
- [NTSB MIA69A0038](https://openairdocs.org/ntsb/MIA69A0038.md): Piper PA-31 · Jamestown, TN · Accident · 6 fatal · Closed · Jan 6, 1969 · N440DL · Destroyed
- [NTSB MIA69A0025](https://openairdocs.org/ntsb/MIA69A0025.md): Cessna 150G · Fayetteville, TN · Accident · 1 fatal · Closed · Nov 4, 1968 · N8501J · Destroyed
- [NTSB MIA67A0131](https://openairdocs.org/ntsb/MIA67A0131.md): Maule M4 · Crossville, TN · Accident · 3 fatal · Closed · Jun 30, 1967 · N9818M · Destroyed
- [NTSB MIA67A0062](https://openairdocs.org/ntsb/MIA67A0062.md): Aero Comdr 680 · Spring City, TN · Accident · 1 fatal · Closed · Dec 2, 1966 · N6857S · Destroyed
- [NTSB MIA67A0054](https://openairdocs.org/ntsb/MIA67A0054.md): Mooney M20C · Roan Mountn, TN · Accident · 1 fatal · Closed · Jul 30, 1966 · N6054Q · Destroyed
- [NTSB MIA66F0336](https://openairdocs.org/ntsb/MIA66F0336.md): Ercoupe 415-C · Winchester, TN · Accident · No injuries · Closed · Nov 28, 1965 · N3084H · Substantial damage
- [NTSB UNK65X1193](https://openairdocs.org/ntsb/UNK65X1193.md): Piper PA-22 · Pelham, TN · Accident · 5 fatal · Closed · Dec 30, 1964 · N8655D · Destroyed
- [NTSB UNK65X0843](https://openairdocs.org/ntsb/UNK65X0843.md): Cessna 172 · Troy, TN · Accident · 1 fatal · Closed · Nov 26, 1964 · N8059B · Destroyed
- [NTSB UNK65X0603](https://openairdocs.org/ntsb/UNK65X0603.md): Beechcraft 23 · Grd Junction, TN · Accident · 2 fatal · Closed · Nov 7, 1964 · N8713M · Destroyed
- [NTSB UNK64X3140](https://openairdocs.org/ntsb/UNK64X3140.md): Beechcraft 35-B33 · Nashville, TN · Accident · 2 fatal · Closed · Jul 31, 1964 · N8972M · Destroyed

## 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 c."eventStateOrRegion" = 'TN' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 650)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/650/cases?state=TN

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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.