# NTSB investigations: Enroute

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.

Page 224 of 718 · 35,889 cases

## Cases, newest first

- [NTSB CHI95LA096](https://openairdocs.org/ntsb/CHI95LA096.md): Cessna T210N · Rockford, IL · Accident · No injuries · Limited investigation · Final report · Mar 7, 1995 · N6622N · Substantial damage
  > A disconnect of the alternator belt, and failure of the pilot to attain a down and locked condition of the gear with the emergency extension system.
- [NTSB SEA95LA061](https://openairdocs.org/ntsb/SEA95LA061.md): Piper PA-22-150 · Forks, WA · Accident · Minor injuries · Limited investigation · Final report · Mar 5, 1995 · N4778A · Substantial damage
  > The loss of power for undetermined reasons and the lack of suitable terrain for a successful forced landing.
- [NTSB LAX95LA127](https://openairdocs.org/ntsb/LAX95LA127.md): Boeing B75N1 · Gaviota, CA · Accident · No injuries · Limited investigation · Final report · Mar 5, 1995 · N450SR · Substantial damage
  > inadequate maintenance and service of the aircraft's carburetor heat system, and the pilot's intentional flight into adverse weather conditions. The lack of a suitable area for the emergency landing was a factor.
- [NTSB LAX95IA128](https://openairdocs.org/ntsb/LAX95IA128.md): ATR 42 · Las Vegas, NV · Incident · No injuries · Incident investigation · Final report · Mar 5, 1995 · N266AT · No damage
  > an unexpected lateral control movement associated with in-flight turbulence.
- [NTSB FTW95FA130](https://openairdocs.org/ntsb/FTW95FA130.md): Cessna 421C · El Prado, NM · Accident · 4 fatal · Field investigation · Final report · Mar 5, 1995 · N421BL · Destroyed
  > The pilot's decision to continue flight into known adverse weather conditions and the ensuing inadvertent stall due to airframe ice. Factors were the weather conditions.
- [NTSB SEA95LA060](https://openairdocs.org/ntsb/SEA95LA060.md): Cessna 150H · Albany, OR · Accident · Minor injuries · Limited investigation · Final report · Mar 4, 1995 · N6663S · Destroyed
  > The pilot's failure to use carburetor heat. Factors include icing conditions and the dark night light conditions.
- [NTSB LAX95LA126](https://openairdocs.org/ntsb/LAX95LA126.md): Schweizer G-164A · Robbins, CA · Accident · No injuries · Limited investigation · Final report · Mar 4, 1995 · N5450 · Substantial damage
  > A failure of the engine master rod. A factor in the accident was the soft, wet condition of the field available for the forced landing.
- [NTSB LAX95LA125](https://openairdocs.org/ntsb/LAX95LA125.md): Mooney M20J · Pacoima, CA · Accident · Minor injuries · Limited investigation · Final report · Mar 4, 1995 · N11385 · Substantial damage
  > the failure of the engine overhaul shop to install the correct gasket stack on the propeller governor pad as required by the engine manufacturer.
- [NTSB NYC95LA067](https://openairdocs.org/ntsb/NYC95LA067.md): Cessna 180J · West Dover, VT · Accident · No injuries · Limited investigation · Final report · Mar 3, 1995 · N180BF · Substantial damage
  > A loss of power for undetermined reasons. The frozen snow covered terrain was a factor.
- [NTSB NYC95LA066](https://openairdocs.org/ntsb/NYC95LA066.md): Cessna 175 · Quantico, VA · Accident · No injuries · Limited investigation · Final report · Mar 3, 1995 · N7175M · Substantial damage
  > the failure of a connecting rod, which resulted in the total loss of engine power. Subsequently, the airplane was ditched.
- [NTSB LAX95FA129](https://openairdocs.org/ntsb/LAX95FA129.md): Piper PA-23-150 · Oceanside, CA · Accident · 4 fatal · Field investigation · Final report · Mar 3, 1995 · N1260P · Destroyed
  > The pilot's intentional VFR flight into known adverse weather. The low ceiling was a factor.
- [NTSB ATL95LA056](https://openairdocs.org/ntsb/ATL95LA056.md): Piper PA-28-140 · Charleston, SC · Accident · Minor injuries · Limited investigation · Final report · Mar 3, 1995 · N7498R · Substantial damage
  > The failure of the position washer in the fuel selector valve, which resulted in the fuel starvation of the engine.
- [NTSB CHI95LA097](https://openairdocs.org/ntsb/CHI95LA097.md): Piper PA-32RT · Joliet, IL · Accident · No injuries · Limited investigation · Final report · Mar 1, 1995 · N1978J · Substantial damage
  > the failure of the number four cylinder due to a loose cylinder hold down stud. A factor in the accident was the embankment.
- [NTSB FTW95LA131](https://openairdocs.org/ntsb/FTW95LA131.md): Piper PA-24-250 · Carlsbad, NM · Accident · Minor injuries · Limited investigation · Final report · Feb 26, 1995 · N5613P · Substantial damage
  > Fuel exhaustion engine power loss due to a leak in the fuel system. Factors were dark night conditions and the lack of suitable terrain for the forced landing.
- [NTSB CHI95IA095](https://openairdocs.org/ntsb/CHI95IA095.md): Boeing 747-136 · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Feb 26, 1995 · GAWNM · No damage
  > the North Local Controller's failure to issue a clearance which would ensure separation between the two airplanes and the North Local Control Monitor's failure to adequately back up the controller. Factors were the complexity of the airport operations and…
- [NTSB NYC95LA064](https://openairdocs.org/ntsb/NYC95LA064.md): Cessna 152 · North Bergen, NJ · Accident · No injuries · Limited investigation · Final report · Feb 25, 1995 · N6291P · Substantial damage
  > The pilot's inadequate in-flight planning which resulted in fuel exhaustion and a subsequent loss of engine power.
- [NTSB ATL95LA055](https://openairdocs.org/ntsb/ATL95LA055.md): Grumman AA-5B · Salisbury, NC · Accident · No injuries · Limited investigation · Final report · Feb 25, 1995 · N28815 · Substantial damage
  > The separation of the oil line to the oil cooler which resulted in a loss of engine oil and subsequent engine seizure.
- [NTSB NYC95LA063](https://openairdocs.org/ntsb/NYC95LA063.md): Beech 35 · Shadyside, OH · Accident · No injuries · Limited investigation · Final report · Feb 24, 1995 · N3344V · Substantial damage
  > The loss of oil pressure, which resulted in the number six connecting rod failure and penetration through the crankcase.
- [NTSB MIA95LA080](https://openairdocs.org/ntsb/MIA95LA080.md): Mooney M20E · Mclain, MS · Accident · No injuries · Limited investigation · Final report · Feb 23, 1995 · N7142U · Substantial damage
  > The improper reassembly of the servo fuel injector during overhaul by maintenance personnel. This resulted in a total loss of engine power during cruise flight due to fuel starvation, forced landing, and subsequent on-ground collision with a fixed object…
- [NTSB FTW95LA119](https://openairdocs.org/ntsb/FTW95LA119.md): Beech 60 · Santa Rosa, NM · Accident · No injuries · Limited investigation · Final report · Feb 23, 1995 · N100BL · Substantial damage
  > The failure of the right engine's turbocharger resulting in oil starvation and subsequent failure of the #5 connecting rod which penetrated the crankcase, and the failure of the left engine's turbocharger resulting in the loss of power on both engines.…
- [NTSB ATL95LA052](https://openairdocs.org/ntsb/ATL95LA052.md): Cessna 152 · Brookwood, AL · Accident · No injuries · Limited investigation · Final report · Feb 23, 1995 · N6470P · Substantial damage
  > The pilot's failure to lean the fuel mixture, stop at the first destination to refuel, and his incorrect fuel consumption calculations.
- [NTSB NYC95GA060](https://openairdocs.org/ntsb/NYC95GA060.md): Eurocopter AS-350-B · Cambridge, MA · Accident · 4 fatal · Final report · Feb 22, 1995 · N20SP · Destroyed
  > 1) The Massachusetts state police (msp) management's failure to provide adequate oversight of its air wing; 2) fuel contamination and obstructed fuel injector nozzles, due to inadequate fuel storage and storage requirements by the msp, resulting in a loss of…
- [NTSB NYC95LA059](https://openairdocs.org/ntsb/NYC95LA059.md): Beech 95 · Millbrook, NY · Accident · Minor injuries · Limited investigation · Final report · Feb 20, 1995 · N8226D · Substantial damage
  > The pilot's failure to manually extend the landing gear which resulted in the landing gear collapsing. A factor was the intermittent loss of electrical power.
- [NTSB MIA95LA079](https://openairdocs.org/ntsb/MIA95LA079.md): Piper PA-32-260 · Caribbean Sea · Accident · No injuries · Limited investigation · Final report · Feb 20, 1995 · N598PR · Destroyed
  > A total loss of engine power for undetermined reasons.
- [NTSB MIA95LA078](https://openairdocs.org/ntsb/MIA95LA078.md): Hughes 500C · Key Largo, FL · Accident · No injuries · Limited investigation · Final report · Feb 20, 1995 · N7172Z · Substantial damage
  > The pilot's misjudgment of altitude and failure to apply collective cushioning pitch during an autorotation resulting in a hard landing. Contributing to the accident was a total loss of engine power due to a loose coupling B-nut on the pneumatic fuel control…
- [NTSB LAX95LA114](https://openairdocs.org/ntsb/LAX95LA114.md): Grumman AA5B · Pacifica, CA · Accident · No injuries · Limited investigation · Final report · Feb 20, 1995 · N28003 · 2 aircraft · Minor damage
  > Failure of the Grumman pilot to maintain visual contact and clearance from the citabria, while overtaking that aircraft. Factors relating to the accident were: the hazy sky condition and the Grumman pilot's diverted attention to other traffic.
- [NTSB FTW95LA120](https://openairdocs.org/ntsb/FTW95LA120.md): Cessna T210M · Montrose, CO · Accident · No injuries · Limited investigation · Final report · Feb 17, 1995 · N6094B · Substantial damage
  > The bent landing gear emergency extension assembly and the accumulation of airframe ice which interfered with landing gear activation. A factor was the alternator failure for unknown reasons.
- [NTSB FTW95LA117](https://openairdocs.org/ntsb/FTW95LA117.md): Cessna 172RG · Plano, TX · Accident · No injuries · Limited investigation · Final report · Feb 17, 1995 · N5096U · Substantial damage
  > The disengagement of the crankshaft gear due to the loosening of the gear retaining bolt and the subsequent fracture of the gear alignment dowel. A factor was the lack of suitable terrain available for the forced landing.
- [NTSB CHI95LA086](https://openairdocs.org/ntsb/CHI95LA086.md): Piper PA-23-250 · Minneapolis, MN · Accident · No injuries · Limited investigation · Final report · Feb 16, 1995 · N62711 · Substantial damage
  > an inadequate windshield deicing system for the inflight icing encountered, airframe icing, and the pilot's inability to maintain a proper descent rate. Factors associated with this accident were an inadequate weather forecast and icing conditions.
- [NTSB NYC95LA055](https://openairdocs.org/ntsb/NYC95LA055.md): Beech C23 · Rochester, NH · Accident · No injuries · Limited investigation · Final report · Feb 15, 1995 · N812Y · Substantial damage
  > The pilot's inadequate inflight planning/decision and inadvertently turning the ignition switch to the off position. A factor was the ignition switch stuck in the off position.
- [NTSB NYC95LA053](https://openairdocs.org/ntsb/NYC95LA053.md): Cessna 152 · Colts Neck, NJ · Accident · Minor injuries · Limited investigation · Final report · Feb 14, 1995 · N89712 · Substantial damage
  > The loss of engine power for undetermined reasons. A factor relating to this accident was the unsuitable terrain.
- [NTSB FTW95FA116](https://openairdocs.org/ntsb/FTW95FA116.md): Bell 206L-4 · East Cameron · Accident · 5 fatal · Field investigation · Final report · Feb 14, 1995 · N172AL · Destroyed
  > Inadvertent flight by the pilot into instrument meteorological conditions (IMC), and his failure to maintain control of the helicopter after becoming spatially disoriented. Factors related to the accident were: the adverse weather conditions, and the pilot's…
- [NTSB LAX95LA107](https://openairdocs.org/ntsb/LAX95LA107.md): Varga 2150A · Yuma, AZ · Accident · Serious injuries · Limited investigation · Final report · Feb 12, 1995 · N56180 · Destroyed
  > fuel exhaustion due to the pilot's inadequate preflight inspection and his failure to refuel the aircraft.
- [NTSB FTW95FA114](https://openairdocs.org/ntsb/FTW95FA114.md): Rockwell 690A · Guthrie, OK · Accident · 2 fatal · Field investigation · Final report · Feb 12, 1995 · N69TM · Destroyed
  > The pilot's failure to maintain adequate airspeed due to airframe ice, which resulted in a loss of control. Factors contributing to the accident were the pilot's continued flight into adverse weather, his failure to obtain weather information either before or…
- [NTSB SEA95LA050](https://openairdocs.org/ntsb/SEA95LA050.md): Beech S-35 · Wolf Point, MT · Accident · No injuries · Limited investigation · Final report · Feb 11, 1995 · N8828M · Substantial damage
  > The loss of power due to lost oil pressure and a failed connecting rod. Factors include fence posts and dusk lighting conditions which limited visibility.
- [NTSB FTW95FA111](https://openairdocs.org/ntsb/FTW95FA111.md): Cessna 177RG · Larkspur, CO · Accident · 1 fatal · Field investigation · Final report · Feb 9, 1995 · N33MR · Destroyed
  > The pilot's decision to continue VFR flight into instrument meteorological conditions after being advised that VFR flight was not recommended. The weather and dark night were factors in the accident.
- [NTSB ATL95LA048](https://openairdocs.org/ntsb/ATL95LA048.md): Cessna T210G · Covington, TN · Accident · Minor injuries · Limited investigation · Final report · Feb 9, 1995 · N6854R · Substantial damage
  > The pilot's inadequate preflight inspection of the aircraft, in that he did not adequately drain water from the fuel system, resulting in water ingestion into the engine.
- [NTSB MIA95LA073](https://openairdocs.org/ntsb/MIA95LA073.md): Roy Long EZ · Columbus, MS · Accident · Serious injuries · Limited investigation · Final report · Feb 8, 1995 · N723HK · Destroyed
  > The pilot's inadequate preflight inspection of the fuel system. This resulted in a total loss of engine power in cruise flight, due to fuel contamination, forced landing, and subsequent in- flight collision with trees and terrain.
- [NTSB FTW95LA113](https://openairdocs.org/ntsb/FTW95LA113.md): Piper PA-32-300 · Howard, CO · Accident · 1 fatal · Limited investigation · Final report · Feb 8, 1995 · N41345 · Destroyed
  > The pilot's flight into known adverse weather over mountainous terrain at an inadequate altitude to recover from turbulence/downdraft. Factors related to the accident were: inadequate preflight planning/preparation by the pilot, his inadequate weather…
- [NTSB NYC95LA051](https://openairdocs.org/ntsb/NYC95LA051.md): Cessna 152 · Belmont, NH · Accident · No injuries · Limited investigation · Final report · Feb 7, 1995 · N6182P · Substantial damage
  > The pilot's inadequate preflight of the airplane that failed to detect the ice clogged breather which resulted in the loss of oil and a subsequent emergency landing.
- [NTSB CHI95LA085](https://openairdocs.org/ntsb/CHI95LA085.md): Piper PA-23 · Benton Harbor, MI · Accident · No injuries · Limited investigation · Final report · Feb 7, 1995 · N2092P · Substantial damage
  > the pilot's improper use of carburetor heat. Factors were carburetor icing conditions, snow, and blowing snow.
- [NTSB FTW95LA108](https://openairdocs.org/ntsb/FTW95LA108.md): Craighead Corben JR. ACE · Athens, TX · Accident · No injuries · Limited investigation · Final report · Feb 6, 1995 · N30CK · Substantial damage
  > The loss of engine power for undetermined reasons. A factor was the lack of suitable terrain for a forced landing.
- [NTSB FTW95LA107](https://openairdocs.org/ntsb/FTW95LA107.md): Cessna 150F · Commerce, OK · Accident · No injuries · Limited investigation · Final report · Feb 5, 1995 · N8732S · Substantial damage
  > Fuel exhaustion as a result of the pilot failing to perform an adequate preflight inspection of the airplane. The lack of suitable terrain on which to make a forced landing was a factor.
- [NTSB CHI95FA082](https://openairdocs.org/ntsb/CHI95FA082.md): Cessna 310L · Valparaiso, IN · Accident · 1 fatal · Field investigation · Final report · Feb 5, 1995 · N157JW · Destroyed
  > spatial disorientation of the pilot while descending into the clouds. Factors were the moderate turbulance and snow.
- [NTSB LAX95LA098](https://openairdocs.org/ntsb/LAX95LA098.md): Schweizer 269C · Red Bluff, CA · Accident · Serious injuries · Limited investigation · Final report · Feb 4, 1995 · N7509H · Substantial damage
  > the flight instructor's poor in-flight decision to continue flight into a reduced visibility area, his failure to execute a 180-degree turn in a timely manner, and his failure to maintain clearance from the terrain.
- [NTSB CHI95LA081](https://openairdocs.org/ntsb/CHI95LA081.md): Piper PA-28-140 · St. Louis, MO · Accident · Serious injuries · Limited investigation · Final report · Feb 4, 1995 · N694SK · Destroyed
  > A loss of engine power due to an excessive fuel mixture caused by undetermined reasons.
- [NTSB CHI95LA080](https://openairdocs.org/ntsb/CHI95LA080.md): Schweizer G-164B · Brule, NE · Accident · No injuries · Limited investigation · Final report · Feb 3, 1995 · N3633Q · Substantial damage
  > Loss of engine power due to undetermined reasons.
- [NTSB MIA95FA070](https://openairdocs.org/ntsb/MIA95FA070.md): Cessna 172N · Mintonville, KY · Accident · 2 fatal · Field investigation · Final report · Feb 2, 1995 · N734KV · Destroyed
  > The flightcrew's intentional VFR flight into known instrument meteorological conditions. A factor was the inadequate altitude to prevent an inadvertent collision with an obstruction.
- [NTSB LAX95LA092](https://openairdocs.org/ntsb/LAX95LA092.md): Piper PA-32-300 · Buckeye, AZ · Accident · No injuries · Limited investigation · Final report · Feb 1, 1995 · N8950N · Substantial damage
  > a loss of engine power for undetermined reasons.
- [NTSB MIA95LA066](https://openairdocs.org/ntsb/MIA95LA066.md): Beech 35 · Sardis, MS · Accident · No injuries · Limited investigation · Final report · Jan 28, 1995 · N5116C · Substantial damage
  > A loss of engine power due to fuel starvation caused by a fuel selector stem failure, due to wear, that precluded the pilot from selecting a fuel tank that had fuel.

Next page: https://openairdocs.org/ntsb-phases/400/cases.md?page=225

## 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."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 400)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/400/cases?page=224

---
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, except the copies of manufacturers’ service documents, which belong to their rights holders.