# 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 49 of 79 · 3,929 cases

## Cases, newest first

- [NTSB LAX90LA029](https://openairdocs.org/ntsb/LAX90LA029.md): Bell-Kitz Kopters 47D1 · Chino, CA · Accident · No injuries · Limited investigation · Final report · Nov 10, 1989 · N6324X · Substantial damage
  > A fatigue failure of both the main rotor stabilizer bar tube and the tie rod. In addition, the tie rod nut was loose and did not conform to engineering drawing specifications. Company personnel failed to detect the fatigue cracks during daily inspections.
- [NTSB ANC90LA012](https://openairdocs.org/ntsb/ANC90LA012.md): Cessna 207 · Quinhagak, AK · Accident · No injuries · Limited investigation · Final report · Nov 7, 1989 · N6255H · Substantial damage
  > Fatigue failure of the right rudder bar. A factor related to the accident was: rough/uneven terrain beside the runway.
- [NTSB MIA90LA026](https://openairdocs.org/ntsb/MIA90LA026.md): Warren/Keleher/Lark JK-1B · Homestead, FL · Accident · No injuries · Limited investigation · Final report · Nov 5, 1989 · N131PW · Substantial damage
  > Seizure of the left main gear wheel. Contributing factors were: the parked aircraft and vehicle (car) near the runway.
- [NTSB LAX90DUJ05](https://openairdocs.org/ntsb/LAX90DUJ05.md): Bell UH-1E · Mesa, AZ · Accident · No injuries · Final report · Nov 4, 1989 · N138US · Destroyed
  > The inflight separation of the tail rotor due to improper maintenance procedures and the installation of incorrect attachment hardware on the tail rotor blade pitch change linkages.
- [NTSB BFO90LA004](https://openairdocs.org/ntsb/BFO90LA004.md): Piper PA-23-150 · Wytheville, VA · Accident · Minor injuries · Limited investigation · Final report · Oct 29, 1989 · N2224P · Substantial damage
  > The loss of propeller control which resulted in engine shutdown and subsequent forced landing on unsuitable terrain.
- [NTSB NYC90DNE01](https://openairdocs.org/ntsb/NYC90DNE01.md): North American T-28B · New Braintree, MA · Accident · No injuries · Final report · Oct 28, 1989 · N504GH · Substantial damage
  > The failure of the nose gear, which failed to retract with the main landing gear after takeoff; the gear was observed to be misaligned, and collapsed during the aircraft's touchdown.
- [NTSB SEA90LA010](https://openairdocs.org/ntsb/SEA90LA010.md): Hughes 369D · Neah Bay, WA · Accident · No injuries · Limited investigation · Final report · Oct 27, 1989 · N9163F · Substantial damage
  > Fatigue failure of all four attachment studs of the tailrotor gearbox resulting in separation of the gear box, and inadequate maintenance inspection.
- [NTSB DEN90IA016](https://openairdocs.org/ntsb/DEN90IA016.md): Boeing 737-322 · Rapid City, SD · Incident · No injuries · Incident investigation · Final report · Oct 27, 1989 · N344UA · No damage
  > The inflight failure of the recirculating fan unit and several air duct temperature limiting sensors.
- [NTSB BFO90FA002](https://openairdocs.org/ntsb/BFO90FA002.md): Beech 58P · Nokesville, VA · Accident · 1 fatal · Field investigation · Final report · Oct 26, 1989 · N86MC · Destroyed
  > Improper installation of the elevator trim actuators, and subsequent jamming of the elevator trim in a nose down trim position.
- [NTSB CHI90LA017](https://openairdocs.org/ntsb/CHI90LA017.md): De Havilland DH82A · Mascoutah, IL · Accident · No injuries · Limited investigation · Final report · Oct 22, 1989 · N100MH · Substantial damage
  > An undetermined powerplant problem, which resulted in a severe vibration. The soft/uneven terrain was considered to be a contributing factor.
- [NTSB NYC90LA014](https://openairdocs.org/ntsb/NYC90LA014.md): Cessna T337G · Pittsburgh, PA · Accident · Serious injuries · Limited investigation · Final report · Oct 19, 1989 · N197 · Destroyed
  > The pilot's improper in-flight planning and decision, and diverting of his attention, which resulted in fuel exhaustion to both engines. Darkness and trees in the emergency landing area were related factors.
- [NTSB MKC90LA010](https://openairdocs.org/ntsb/MKC90LA010.md): Cessna 172 · Omaha, NE · Accident · No injuries · Limited investigation · Final report · Oct 19, 1989 · N5336R · Substantial damage
  > Failure of the throttle cable assembly which resulted in a forced landing and subsequent collision with a fence.
- [NTSB DEN90IA012](https://openairdocs.org/ntsb/DEN90IA012.md): Mcdonnell Douglas DC-9 · Monte Vista, CO · Incident · Minor injuries · Incident investigation · Final report · Oct 18, 1989 · N922RW · Minor damage
  > The poor inflight planning and decisions made by the flight crew following the failure of the number two generator constant speed drive unit. Contributing factors to the accident were the failure of the no. 2 generator constant speed drive unit and the crew's…
- [NTSB DEN90LA008](https://openairdocs.org/ntsb/DEN90LA008.md): Thunder and Colt Clown · Albuquerque, NM · Accident · No injuries · Limited investigation · Final report · Oct 14, 1989 · GGWIZ · Substantial damage
  > Structural failure of the balloon envelope as a result of the manufacturer's quality control oversight.
- [NTSB MIA90LA011](https://openairdocs.org/ntsb/MIA90LA011.md): Beech 58P · Jackson, MS · Accident · No injuries · Limited investigation · Final report · Oct 12, 1989 · N94JP · Substantial damage
  > The pilot's misunderstanding of the landing gear emergency extension procedure, which resulted in his inadvertent partial retraction of the gear and failure to land with the gear in the down and locked position. Loss of electrical power was a factor.
- [NTSB LAX90FA008](https://openairdocs.org/ntsb/LAX90FA008.md): Beech F33A · Goodyear, AZ · Accident · 3 fatal · Field investigation · Final report · Oct 11, 1989 · N67536 · Destroyed
  > The inflight separation of one propeller blade due to a fatigue fracture of undetermined origin, and failure of the pilot to maintain control of the aircraft during an attempt to return to the runway. A factor in the accident was the oil covered windsheild,…
- [NTSB NYC90MA009](https://openairdocs.org/ntsb/NYC90MA009.md): Agusta A109A Mkii · Lacey Township, NJ · Accident · 5 fatal · Major investigation · Final report · Oct 10, 1989 · N21FL · Destroyed
  > In-flight separation of a main rotor blade due to fatigue failure of the main rotor blade spar, which originated at a manufacturing induced scratch (tool mark) that was the result of inadequate quality control.
- [NTSB CHI90IA006](https://openairdocs.org/ntsb/CHI90IA006.md): Boeing 757-251 · San Francisco, CA · Incident · No injuries · Incident investigation · Final report · Oct 9, 1989 · N512US · Minor damage
  > The extreme wear and eventual failure of a torque tube in the inboard trailing edge flap system. Inspection and lubrication intervals were a factor, as was the physical location of the torque tube with reference to external factors.
- [NTSB ATL90FA001](https://openairdocs.org/ntsb/ATL90FA001.md): Beech C90 · Chamblee, GA · Accident · 2 fatal · Field investigation · Final report · Oct 1, 1989 · N43GT · Destroyed
  > Malfunction of one or more flight instruments for an undetermined reason, failue of the pilot to maintain control of the aircraft with partial panel instruments after becoming spatially disoriented, and his exceeding the design stress limits of the aircraft.…
- [NTSB NYC89FA221](https://openairdocs.org/ntsb/NYC89FA221.md): Aeronca 65TL · Beaver Falls, PA · Accident · 1 fatal · Field investigation · Final report · Sep 30, 1989 · N33890 · Destroyed
  > The failure of the left wing, rear upper strut attachment. The failure was caused by not installing the retaining bolt and nut.
- [NTSB ATL89DKG06](https://openairdocs.org/ntsb/ATL89DKG06.md): Bell UH-1B · Plains, GA · Accident · 2 fatal · Final report · Sep 29, 1989 · N840MC · Destroyed
  > Improper modification of the helicopter by the company/operator, and failure of the spray boom, which resulted in mast bumping, and subsequent failure of the main rotor assembly.
- [NTSB CHI89DEM09](https://openairdocs.org/ntsb/CHI89DEM09.md): Hiller UH-12E · Hudsonville, MI · Accident · Minor injuries · Final report · Sep 28, 1989 · N4028T · Substantial damage
  > The fatigue failure of one of the tension-torsion pins.
- [NTSB ATL89FA220](https://openairdocs.org/ntsb/ATL89FA220.md): Aerospatiale AS 350D · Chamblee, GA · Accident · 1 fatal · Field investigation · Final report · Sep 28, 1989 · N57689 · Destroyed
  > Failure of the main rotor swashplate bearing due to lack of lubricant.
- [NTSB MKC89LA198](https://openairdocs.org/ntsb/MKC89LA198.md): Beech 80 · Littlefork, MN · Accident · No injuries · Limited investigation · Final report · Sep 21, 1989 · N132BA · Substantial damage
  > Total failure of the electrical system during IFR operations & the aircraft's collision with a rock fence during the subsequent gear-up precautionary landing.
- [NTSB MIA89LA255](https://openairdocs.org/ntsb/MIA89LA255.md): Hughes 269B · Lexington, MS · Accident · Minor injuries · Limited investigation · Final report · Sep 21, 1989 · N9318F · Substantial damage
  > Fatigue failure of the linear actuator lug. A related factor was: trees in the emergency landing area.
- [NTSB CHI89DEC08](https://openairdocs.org/ntsb/CHI89DEC08.md): Wesley Striplin Ranger · Smith Creek, MI · Accident · 1 fatal · Final report · Sep 18, 1989 · N46WW · Destroyed
  > The improper installation of the wingtip fuel tank which resulted in its inflight separation and the subsequent loss of control.
- [NTSB LAX89FA314](https://openairdocs.org/ntsb/LAX89FA314.md): Piper PA-31-350 · Ontario, CA · Accident · 1 fatal · Field investigation · Final report · Sep 15, 1989 · N70PE · Destroyed
  > Failure of the right propeller hub due to metal fatigue which resulted in catastrophic separation of the propeller. Contributing to the accident was damage done to the aircraft airframe in flight by the separating propeller making the aircraft uncontrollable.
- [NTSB ATL89LA212](https://openairdocs.org/ntsb/ATL89LA212.md): Sikorsky H-34J · Louisville, GA · Accident · No injuries · Limited investigation · Final report · Sep 15, 1989 · N4556D · Destroyed
  > An undetermined malfunction of the main rotor drive system.
- [NTSB CHI89FA183](https://openairdocs.org/ntsb/CHI89FA183.md): McDonnell Douglas MD-80 · Chicago, IL · Accident · Minor injuries · Field investigation · Final report · Sep 12, 1989 · N244AA · Substantial damage
  > A loss of hydraulic system pressure due to the operator's failure to replace a system component that had a known history of failures, and the pilot's improper use powerplant controls resulting in a degradation of rudder effectiveness. A contributing factor…
- [NTSB CHI89LA182](https://openairdocs.org/ntsb/CHI89LA182.md): Cessna 152 · Newark, IL · Accident · Serious injuries · Limited investigation · Final report · Sep 11, 1989 · N4841P · Substantial damage
  > Inadequate supervision by the flight instructor (CFI) and his delay in aborting the takeoff. Factors related to the accident were: malfunction of the flap system, which resulted in an improper flap setting for takeoff, and the soft runway condition.
- [NTSB LAX89DVG09](https://openairdocs.org/ntsb/LAX89DVG09.md): Clatti FOCKE-WULF-190 · Placerville, CA · Accident · 1 fatal · Final report · Sep 8, 1989 · N34FW · Destroyed
  > The wing failed due to delamination caused by adhesive separation.
- [NTSB FTW89DRD14](https://openairdocs.org/ntsb/FTW89DRD14.md): Grumman G-164A · Franklin, LA · Accident · No injuries · Final report · Sep 8, 1989 · N7498 · Substantial damage
  > Fatigue failure of the propeller blade, which resulted in separation of the blade's tip and severe engine vibration. The soft terrain was a related factor.
- [NTSB LAX89DUQ05](https://openairdocs.org/ntsb/LAX89DUQ05.md): Ruppercht Varieze · California City, CA · Accident · 2 fatal · Final report · Sep 2, 1989 · N393D · Destroyed
  > The wing failed due to the pilot/owners overtorquing the wing bolts and the improper installation of the wing attach plates/cones.
- [NTSB ANC89FA155](https://openairdocs.org/ntsb/ANC89FA155.md): Cessna 180 · Anchorage, AK · Accident · Minor injuries · Field investigation · Final report · Sep 2, 1989 · N2137Z · Substantial damage
  > Oil leak in the oil cooler. Contributing factors were: oil film on the windshield, which obscured the pilot's vision (visual perception) and hampered his ability to attain proper runway alignment, an object (rock), and high vegetation beside the airstrip.
- [NTSB MKC89FA191](https://openairdocs.org/ntsb/MKC89FA191.md): Piper PA-20 · Moose Lake, MN · Accident · 2 fatal · Field investigation · Final report · Aug 30, 1989 · N2841P · Destroyed
  > Severe corrosion of the lower forward lift strut for the right wing, inadequate inspection of the lift strut by maintenance personnel, and subsequent failure of the lift strut, which resulted in an overload failure (folding back) of the wing. Related factors…
- [NTSB DEN89FA202](https://openairdocs.org/ntsb/DEN89FA202.md): Aerospatiale AS-350D · Blanchard, ID · Accident · 4 fatal · Field investigation · Final report · Aug 28, 1989 · N132SH · Destroyed
  > Overheating and seizure of the swashplate bearing, which resulted in an inflight breakup of the helicopter and subsequent impact with the ground.
- [NTSB DEN89LA199](https://openairdocs.org/ntsb/DEN89LA199.md): Cessna T210F · Englewood, CO · Accident · Serious injuries · Limited investigation · Final report · Aug 24, 1989 · N6121R · Substantial damage
  > A failure in the hyrdraulic power unit, which prevented operation of either the normal or emergency gear extension systems. The raised runway lip contributed to aircraft damage and pilot injury.
- [NTSB MIA89LA229](https://openairdocs.org/ntsb/MIA89LA229.md): Bell 47G · Ponce, PR · Accident · No injuries · Limited investigation · Final report · Aug 23, 1989 · N955B · Substantial damage
  > Failure of the aft tail rotor drive shaft.
- [NTSB SEA89LA153](https://openairdocs.org/ntsb/SEA89LA153.md): Piper PA-28 · Mulino, OR · Accident · No injuries · Limited investigation · Final report · Aug 19, 1989 · N7358J · Substantial damage
  > Improper installation and routing of the fuel pressure line and/or electrical wiring, due to improper maintenance, which resulted in mechanical binding of the elevator control column. The fence was considered to be a related factor.
- [NTSB MIA89LA221](https://openairdocs.org/ntsb/MIA89LA221.md): Continental Copters Tomcat MK6C · Quitman, MS · Accident · Serious injuries · Limited investigation · Final report · Aug 14, 1989 · N9085T · Destroyed
  > Failure of the tail boom attachment.
- [NTSB LAX89FA277](https://openairdocs.org/ntsb/LAX89FA277.md): Piper PA-23-250 · Lake Tahoe, CA · Accident · 2 fatal · Field investigation · Final report · Aug 14, 1989 · N4838P · Destroyed
  > Disablement of the stabilator flight control system. A contributing factor was: inadequate maintenance.
- [NTSB NYC89IA185](https://openairdocs.org/ntsb/NYC89IA185.md): Boeing 727-254 · Boston, MA · Incident · Minor injuries · Incident investigation · Final report · Aug 10, 1989 · N915TS · Minor damage
  > The failure of the landing gear drag brace to unlock during landing. Contributing was the failure of pacific southwest airlines to catch the incorrect assembly. An additional factor was the use of faulty information by eastern airlines and their decision to…
- [NTSB LAX89IA315](https://openairdocs.org/ntsb/LAX89IA315.md): Boeing 727-224 · Los Angeles, CA · Incident · No injuries · Incident investigation · Final report · Aug 10, 1989 · N88709 · Minor damage
  > A fatigue crack in the right gear wheel well.
- [NTSB CHI89DEK02](https://openairdocs.org/ntsb/CHI89DEK02.md): Keener Rotorway/Exec · Circleville, OH · Accident · No injuries · Final report · Aug 6, 1989 · N4JK · Destroyed
  > Material failure of an oil line allowing oil to escape and ignite as it touched hot exhaust manifold surfaces.
- [NTSB FTW89FA143](https://openairdocs.org/ntsb/FTW89FA143.md): Balloon Works Firefly 6B · Baton Rouge, LA · Accident · 1 fatal · Field investigation · Final report · Aug 5, 1989 · N27113 · Substantial damage
  > The pilot exceeded the temperature limitations of the Balloon during the climb, which resulted in failure of the frabric. Factors related to the accident were: the previous heat damage to the frabric, and the lack of maintenance by the pilot/owner.
- [NTSB MIA89FA210](https://openairdocs.org/ntsb/MIA89FA210.md): Beech A24R · Sarasota, FL · Accident · 2 fatal · Field investigation · Final report · Aug 2, 1989 · N24586 · Destroyed
  > Failure of the propeller hub due to previous damage, which resulted in subsequent fatigue failure of the hub; and failure of the pilot to maintain flying speed, which resulted in a stall and subsequent impact with the ground. Inadequate maintenance/inspection…
- [NTSB MKC89LA163](https://openairdocs.org/ntsb/MKC89LA163.md): Beech 58 · Cedar Rapids, IA · Accident · No injuries · Limited investigation · Final report · Jul 30, 1989 · N1846L · Substantial damage
  > The failure of the pilot in command to maintain alignment with the runway and excessive aircraft control in close proximity to the ground. Contributing to the accident was the pilot's diverted attention which resulted from having to shut down the left engine.
- [NTSB LAX89LA250](https://openairdocs.org/ntsb/LAX89LA250.md): Cessna 210 · Thermal, CA · Accident · No injuries · Limited investigation · Final report · Jul 27, 1989 · N76RR · Substantial damage
  > A twisted nose gear uplock due to an elongated bolt hole which prevented the nose gear from extending.
- [NTSB NYC89IA176](https://openairdocs.org/ntsb/NYC89IA176.md): Douglas DC-9-30 · Newark, NJ · Incident · No injuries · Incident investigation · Final report · Jul 26, 1989 · N556NY · Minor damage
  > Rupture of a flexible high pressure hydraulic line in the 'a' hydraulic system, due to chafing of the steel braid covering, which allowed the system pressure and quantity to be completely depleted.
- [NTSB MIA89LA204](https://openairdocs.org/ntsb/MIA89LA204.md): Texas Helicopter OH-13E/M74 · Greenwood, MS · Accident · No injuries · Limited investigation · Final report · Jul 21, 1989 · N47345 · Substantial damage
  > Failure of a main rotor blade pitch change horn and/or attaching bolt(s).

Next page: https://openairdocs.org/ntsb.md?occurrence=130&page=50

## 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=49

---
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.