# NTSB investigations: Airframe/component/system failure/malfunction

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 44 of 79 · 3,929 cases

## Cases, newest first

- [NTSB CHI91IA297](https://openairdocs.org/ntsb/CHI91IA297.md): Boeing 727-224 · Detroit, MI · Incident · No injuries · Incident investigation · Final report · Sep 20, 1991 · N88704 · Minor damage
  > Inadequate maintenance inspection of the main landing gear actuator assembly by company maintenance personnel. A factor in the incident is inadequate design of the landing gear actuator by the manufacturer.
- [NTSB NYC91LA240](https://openairdocs.org/ntsb/NYC91LA240.md): Piper PA-22 · Slippery Rock, PA · Accident · Minor injuries · Limited investigation · Final report · Sep 18, 1991 · N9741D · Substantial damage
  > The on ground collision with a farm vehicle during landing roll out.
- [NTSB CHI91LA300](https://openairdocs.org/ntsb/CHI91LA300.md): ATR ATR 42-300 · Muskegon, MI · Accident · Serious injuries · Limited investigation · Final report · Sep 14, 1991 · N243AT · No damage
  > The failure, for reasons unknown, of the number four bearing in the high pressure spool of the engine.
- [NTSB DCA91MA052](https://openairdocs.org/ntsb/DCA91MA052.md): Embraer 120 · Eagle Lake, TX · Accident · 14 fatal · Class 1 · Major · Final report · Sep 11, 1991 · N33701 · Destroyed
  > The failure of Continental express maintenance and inspection personnel to adhere to proper maintenance and quality assurance procedures for the airplane's horizontal stabilizer deice boots that led to the sudden in-flight loss of the partially secured left…
- [NTSB NYC91LA232](https://openairdocs.org/ntsb/NYC91LA232.md): Piper PA46-350P · Dayton, OH · Accident · No injuries · Limited investigation · Final report · Sep 8, 1991 · N350MM · Substantial damage
  > A malfunction of the elevator trim indicator and incorrect position of the trim tab which resulted in the pilot aborting the takeoff and a loss of directional control on the ground.
- [NTSB NYC91LA229](https://openairdocs.org/ntsb/NYC91LA229.md): Piper PA-28-140 · Somerville, NJ · Accident · No injuries · Limited investigation · Final report · Sep 5, 1991 · N6183J · Substantial damage
  > An off airport landing in unsuitable terrain following a power loss due to oil exhaustion. A factor related to the accident was the operators decision not to follow the recommendations of the Piper cherokee service manual.
- [NTSB FTW91FA155](https://openairdocs.org/ntsb/FTW91FA155.md): Bell 412 · Garden Banks · Accident · 1 fatal · Field investigation · Final report · Aug 26, 1991 · N3909F · Substantial damage
  > Overheating and subsequent failure of the number one tail rotor hanger bearing for an undeterined reason, and failure of the tail rotor drive shaft.
- [NTSB LAX91LA369](https://openairdocs.org/ntsb/LAX91LA369.md): Hiller UH12D · Sparks, NV · Accident · No injuries · Limited investigation · Final report · Aug 25, 1991 · N100HH · Substantial damage
  > The encounter with rough, unsuitable terrain during a precautionary landing. Contributing to the accident was the pilot's decision to make an autorotation after encountering an airframe vibration.
- [NTSB NYC91LA219](https://openairdocs.org/ntsb/NYC91LA219.md): Mooney M20F · Meadville, PA · Accident · Serious injuries · Limited investigation · Final report · Aug 24, 1991 · N3827N · Substantial damage
  > Engine failure resulting from the fatigue failure of the number 2 cylinder exhaust valve and the subsequent forced landing at night. A factor related to the accident was the restricted visibility.
- [NTSB LAX91LA375](https://openairdocs.org/ntsb/LAX91LA375.md): Beierle Thunder Gull J · Santa Margarita, CA · Accident · Serious injuries · Limited investigation · Final report · Aug 24, 1991 · UNREG · Destroyed
  > The failure of the wing spar when the design limits of the airplane was exceeded by the pilot. Contributing to the accident was an inadequate airframe design and an abrupt movement of the flight controls by the pilot.
- [NTSB CHI91LA263](https://openairdocs.org/ntsb/CHI91LA263.md): Beech 36 · Davenport, IA · Accident · No injuries · Limited investigation · Final report · Aug 15, 1991 · N25496 · 2 aircraft · Substantial damage
  > The inadequate visual lookout and poor inflight planning and decision making by the pilot of N97867. Factors in the accident are inoperative exterior lights and radio communication not possible.
- [NTSB CHI91MA260](https://openairdocs.org/ntsb/CHI91MA260.md): British Aerospace 3201 · St Louis, MO · Accident · No injuries · Major investigation · Final report · Aug 12, 1991 · N339TE · Substantial damage
  > Failure of the pilot(s) to follow the correct emergency procedure. Factors related to this accident were: inadequate system design by the manufacturer, which allowed hydraulic line vibration, fatigue failure of the line, and loss of fluid from the normal…
- [NTSB CHI91LA257](https://openairdocs.org/ntsb/CHI91LA257.md): Bell 47G · Lake Ozark, MO · Accident · No injuries · Limited investigation · Final report · Aug 11, 1991 · N61SD · Substantial damage
  > Failure of the rotorcraft's tail boom in flight. Factors related to the accident were reduced aircraft control available to the pilot.
- [NTSB FTW91IA143](https://openairdocs.org/ntsb/FTW91IA143.md): Bell 412 · Rowan Midland · Incident · No injuries · Incident investigation · Final report · Aug 8, 1991 · N177EH · No damage
  > The mechanic's failure to assemble the tail rotor drive shaft correctly and the subsequent failure of the tail rotor drive shaft. A factor was the lack of inspection procedures for offshore maintenance.
- [NTSB LAX91LA340](https://openairdocs.org/ntsb/LAX91LA340.md): Champion 7GCBC · Lake Elsinore, CA · Accident · 2 fatal · Limited investigation · Final report · Aug 2, 1991 · N1693G · Destroyed
  > The in-flight failure of the right elevator. Factors relating to this accident was the pilot's decision to perform aerobatics at an improper altitude.
- [NTSB FTW91DRD07](https://openairdocs.org/ntsb/FTW91DRD07.md): Grumman G-164B · Donaldsonville, LA · Accident · No injuries · Final report · Jul 28, 1991 · N573AF · Substantial damage
  > The mechanical failure of the propeller blade pitch positioning bolt. A factor was the lack of suitable terrain available for the forced landing.
- [NTSB ATL91LA144](https://openairdocs.org/ntsb/ATL91LA144.md): Beech C24R · Morrisville, NC · Accident · No injuries · Limited investigation · Final report · Jul 28, 1991 · N6713P · Substantial damage
  > Failure of the left main landing gear uplock cylinder which precluded extension of the landing gear.
- [NTSB LAX91LA328](https://openairdocs.org/ntsb/LAX91LA328.md): Beech 76 · Sacramento, CA · Accident · No injuries · Limited investigation · Final report · Jul 24, 1991 · N6045M · Substantial damage
  > A fatigue failure of the landing gear strut due to an inadequate design by the manufacturer. Contributing to the accident was maintenance personnel not having completed an inspection of the gear strut, in accordance with the manufacturer's service bulletin.
- [NTSB LAX91FA324](https://openairdocs.org/ntsb/LAX91FA324.md): Beech 95-C55 · Granada Hills, CA · Accident · 3 fatal · Field investigation · Final report · Jul 23, 1991 · N77CQ · Destroyed
  > A loss of directional control following an undetermined autopilot failure, during which the pilot failed to perform the emergency procedure to correct a mis-trim condition. Contributing to the accident was a perceived elevator control problem; the inability…
- [NTSB CHI91IA223](https://openairdocs.org/ntsb/CHI91IA223.md): Beech B200 · Greenbay, WI · Incident · No injuries · Incident investigation · Final report · Jul 22, 1991 · N770M · Minor damage
  > Inadequate airframe design, which resulted in the in-flight separation of the left engine's outboard aft upper cowl door.
- [NTSB DEN91LA102](https://openairdocs.org/ntsb/DEN91LA102.md): Douglas DC-3C · Albuquerque, NM · Accident · No injuries · Limited investigation · Final report · Jul 20, 1991 · N96H · Substantial damage
  > The failure of the right main landing gear tire.
- [NTSB FTW91FA123](https://openairdocs.org/ntsb/FTW91FA123.md): Hughes 269B · Brickeys, AR · Accident · 1 fatal · Field investigation · Final report · Jul 18, 1991 · N11XC · Destroyed
  > The failure of the clutch control cable due to fraying which initiated the forced landing and the operator's failure to perform recommended inspections on the aircraft. Factors were the pilot's failure to maintain rotor RPM and the unsuitable terrain.
- [NTSB ATL91IA134](https://openairdocs.org/ntsb/ATL91IA134.md): de Havilland DHC-8-102 · Savannah, GA · Incident · No injuries · Incident investigation · Final report · Jul 17, 1991 · N922HA · Minor damage
  > The inadequate inspection procedures which allowed the loss of torque on the top retraction fitting attachment bolt which subsequently failed in fatigue. Factors were the loss of hydraulic fluid through a severed line, and the corrosion of a hydraulic…
- [NTSB CHI91LA218](https://openairdocs.org/ntsb/CHI91LA218.md): Piper PA-24-260 · Flint, MI · Accident · No injuries · Limited investigation · Final report · Jul 14, 1991 · N8803P · Substantial damage
  > Propeller pitch change mechanism sheared. Factors related to the accident were powerplant vibration and proper touchdown point not possible.
- [NTSB LAX91IA308](https://openairdocs.org/ntsb/LAX91IA308.md): Mcdonnell Douglas DC-10-10 · Los Angeles, CA · Incident · Minor injuries · Incident investigation · Final report · Jul 13, 1991 · N111AA · No damage
  > The failure of the number 2 engine's fire detection system, systron donner fire detector.
- [NTSB CHI91LA217](https://openairdocs.org/ntsb/CHI91LA217.md): Piper PA22/20 · Stevens Point, WI · Accident · No injuries · Limited investigation · Final report · Jul 13, 1991 · N5968D · Substantial damage
  > The improper installation of the flight control system rudder control rod (rudder cable bellcrank torque tube) by maintenance personnel. A factor contributing to this accident was the inoperative tailwheel steering.
- [NTSB DEN91LA099](https://openairdocs.org/ntsb/DEN91LA099.md): Beech 95-B55 · Watkins, CO · Accident · No injuries · Limited investigation · Final report · Jul 12, 1991 · N711VL · Substantial damage
  > A blown tire and both pilots' failure to maintain directional control.
- [NTSB DEN91FA098](https://openairdocs.org/ntsb/DEN91FA098.md): Boeing 707-323C · Denver, CO · Accident · No injuries · Field investigation · Final report · Jul 9, 1991 · N8404 · Substantial damage
  > Improper overhaul of the nose gear assembly by other maintenance personnel.
- [NTSB LAX91LA300](https://openairdocs.org/ntsb/LAX91LA300.md): Cessna 320 · Reno, NV · Accident · No injuries · Limited investigation · Final report · Jul 8, 1991 · N3011T · Substantial damage
  > The fatigue failure of the propeller feathering counter weight clamp assembly.
- [NTSB MIA91LA182](https://openairdocs.org/ntsb/MIA91LA182.md): Aerotek PITTS-S2A · Eustis, FL · Accident · Minor injuries · Limited investigation · Final report · Jul 6, 1991 · N31427 · Substantial damage
  > The loss of elevator control in flight due to a screwdriver jamming the elevator control for unknown causes.
- [NTSB CHI91LA215](https://openairdocs.org/ntsb/CHI91LA215.md): Cessna 182A · Menomonee Falls, WI · Accident · No injuries · Limited investigation · Final report · Jul 5, 1991 · N4735D · Substantial damage
  > The fatigue induced propeller blade failure. A related factor was the operator's delayed propeller overhaul.
- [NTSB NYC91IA165](https://openairdocs.org/ntsb/NYC91IA165.md): Boeing 727-254 · Buffalo, NY · Incident · No injuries · Incident investigation · Final report · Jul 2, 1991 · N913TS · No damage
  > Chaffing fire detector loop on the number one engine.
- [NTSB DEN91LA095](https://openairdocs.org/ntsb/DEN91LA095.md): Bell 412 · Grand Junction, CO · Accident · No injuries · Limited investigation · Final report · Jul 1, 1991 · N20703 · Substantial damage
  > The pilot's failure to maintain adequate main rotor RPM prior to touchdown. Factors were: the disconnected engine to transmission drive shaft and the inadequate inspection by company maintenance personnel.
- [NTSB CHI91DER10](https://openairdocs.org/ntsb/CHI91DER10.md): Kolb Twinstar MK II · Staples, MN · Accident · Serious injuries · Final report · Jun 30, 1991 · N503BP · Destroyed
  > The disconnected elevator trim cable. Related factors are the inadequate maintenance/installation, and the pilot's inability to maintain aircraft control.
- [NTSB FTW91LA113](https://openairdocs.org/ntsb/FTW91LA113.md): Cessna A188B · Lewisville, AR · Accident · No injuries · Limited investigation · Final report · Jun 29, 1991 · N731KV · Substantial damage
  > The failure of the right brake line during a critical phase of operation.
- [NTSB DEN91LA092](https://openairdocs.org/ntsb/DEN91LA092.md): Cessna 182P · Albuquerque, NM · Accident · Minor injuries · Limited investigation · Final report · Jun 29, 1991 · N21420 · Substantial damage
  > The pilot's improper maintenance of the aircraft. Factors were: a loose oil filter and loss of engine oil.
- [NTSB CHI91DEC02](https://openairdocs.org/ntsb/CHI91DEC02.md): Howard Tierra II · Cambridge Jct, MI · Accident · 2 fatal · Final report · Jun 23, 1991 · N351R · Destroyed
  > Entanglement of the emergency ballistic parachute with the airplane's propeller shaft after it deployed for an undetermined reason. A factor related to the accident was: the aircraft's weight and balance limit was exceeded by the pilot.
- [NTSB CHI91DCD01](https://openairdocs.org/ntsb/CHI91DCD01.md): Heal SONERAI-I · Davenport, IA · Accident · 1 fatal · Final report · Jun 23, 1991 · N4227N · Destroyed
  > Failure of the wing spar straps, as the aircraft was being maneuvered around a pylon in an air race.
- [NTSB CHI91DEP09](https://openairdocs.org/ntsb/CHI91DEP09.md): Bowers Flybaby 1A · Stoughton, WI · Accident · 1 fatal · Final report · Jun 17, 1991 · N8084D · Destroyed
  > The inadequate design by the manufacturer to provide for adequate protection from moisture accumulation in the form of drain holes. Contributing factors were the deterioration (wood rot) of the wing spar attach and the lack of inspection access.
- [NTSB CHI91DEP08](https://openairdocs.org/ntsb/CHI91DEP08.md): Jack Thomas Pitts S-IT · Kenosha, WI · Accident · 1 fatal · Final report · Jun 16, 1991 · N83AM · Destroyed
  > Improper maintenance, by person or persons unknown, to the elevator control system which allowed a bolt attaching the elevator control rod to the pitch bellcrank to become disconnected during flight.
- [NTSB DEN91LA082](https://openairdocs.org/ntsb/DEN91LA082.md): Boeing DHC-6-300 · Denver, CO · Accident · No injuries · Limited investigation · Final report · Jun 12, 1991 · N242CA · Substantial damage
  > The pilot's failure to perform an adequate preflight, I.e., not following the check list and the normal brake system was inoperative as a result of no hydraulic system pressure (hydraulic system circuit breaker not 'in').
- [NTSB FTW91LA094](https://openairdocs.org/ntsb/FTW91LA094.md): Pitts S1C · Houston, TX · Accident · No injuries · Limited investigation · Final report · Jun 9, 1991 · N48JP · Substantial damage
  > The failure of the propeller due to improper installation.
- [NTSB CHI91LA184](https://openairdocs.org/ntsb/CHI91LA184.md): Piper PA-28-140 · Grass Lake, MI · Accident · Minor injuries · Limited investigation · Final report · Jun 9, 1991 · N7470R · Substantial damage
  > A ruptured oil cooler line. A factor associated with the accident was the lack of suitable terrain for the precautionary landing.
- [NTSB CHI91LA182](https://openairdocs.org/ntsb/CHI91LA182.md): Cessna 310L · Fort Wayne, IN · Accident · No injuries · Limited investigation · Final report · Jun 6, 1991 · N3337X · Substantial damage
  > The improper installation of a bearing by maintenance personnel.
- [NTSB DEN91FA079](https://openairdocs.org/ntsb/DEN91FA079.md): Cessna 210M · Colorado City, TX · Accident · 2 fatal · Field investigation · Final report · Jun 3, 1991 · N777DH · Destroyed
  > The pilot continuing flight into known adverse weather conditions and exceeding the design stress limits of the aircraft. Factors were: thunderstorm, updrafts and the pilot's disregard of the weather briefing.
- [NTSB NYC91LA153](https://openairdocs.org/ntsb/NYC91LA153.md): Cessna 310R · Westerly, RI · Accident · No injuries · Limited investigation · Final report · Jun 1, 1991 · N3227A · Substantial damage
  > Improper installation of the right propeller which resulted in thread failure in the propeller hub and separation of the propeller in flight. A factor related to the accident was the right propeller striking the right main landing gear causing its separation…
- [NTSB NYC91LA141](https://openairdocs.org/ntsb/NYC91LA141.md): Champion 7KCAB · Ossipee, NH · Accident · Minor injuries · Limited investigation · Final report · May 25, 1991 · N6342N · Substantial damage
  > An inadequate annual inspection by the mechanic which resulted in the inflight failure of the elevator control cable.
- [NTSB DEN91IA076](https://openairdocs.org/ntsb/DEN91IA076.md): Aero Commander 690C · Denver, CO · Incident · No injuries · Incident investigation · Final report · May 24, 1991 · N81TR · No damage
  > Fatigue failure of flap cable.
- [NTSB FTW91DPG10](https://openairdocs.org/ntsb/FTW91DPG10.md): Weatherly 201B · Mc Crory, AR · Accident · No injuries · Final report · May 23, 1991 · N1260W · Substantial damage
  > Loss of the outboard portion of the propeller blade. A factor was the lack of suitable terrain for the forced landing.
- [NTSB ATL91LA098](https://openairdocs.org/ntsb/ATL91LA098.md): Cessna 152 · Knightdale, NC · Accident · No injuries · Limited investigation · Final report · May 23, 1991 · N93002 · Substantial damage
  > The student pilot's delay in aborting the takeoff. The pilot's continued operation of the airplane with a known discrepancy and the operator's previous improper maintenance/inspection of the pitot/static system were factors related to the accident.

Next page: https://openairdocs.org/ntsb.md?occurrence=130&page=45

## The whole list in SQL

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

```sql
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 o.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o."occurrenceNumber" = 1 AND o."occurrenceCode" = 130)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?occurrence=130&page=44

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