# NTSB investigations, 1999: 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 1 of 3 · 132 cases

## Latest cases

- [NTSB FTW00LA055](https://openairdocs.org/ntsb/FTW00LA055.md): Cessna 172L · New Orleans, LA · Accident · No injuries · Limited investigation · Final report · Dec 28, 1999 · N172GT · Substantial damage
  > The pilot's inadvertent starting of the engine. Factors were the pilot's failure to set the mixture control to the off position, and the intermittent short in the starter switch.
- [NTSB CHI00FA050](https://openairdocs.org/ntsb/CHI00FA050.md): Israel Aircraft Industries 1124A · Milwaukee, WI · Accident · No injuries · Field investigation · Final report · Dec 26, 1999 · N422BC · Substantial damage
  > The failure of the first stage pressure reducer in the oxygen regulator assembly.
- [NTSB DEN00IA032](https://openairdocs.org/ntsb/DEN00IA032.md): Boeing 737-347 · Salt Lake City, UT · Incident · No injuries · Incident investigation · Final report · Dec 24, 1999 · N305WA · Minor damage
  > Improper assembly of the wheel during build up in the operator's maintenance facilities.
- [NTSB SEA00LA032](https://openairdocs.org/ntsb/SEA00LA032.md): Cessna 140 · Helena, MT · Accident · No injuries · Limited investigation · Final report · Dec 15, 1999 · N2739N · Substantial damage
  > Separation of the left main landing gear. Factors include inadequate preflight inspection by the pilot, and inadequate inspection at the time of annual inspection by maintenance personnel.
- [NTSB ATL00LA015](https://openairdocs.org/ntsb/ATL00LA015.md): Maule M7-235C · Iuka, MS · Accident · No injuries · Limited investigation · Final report · Dec 15, 1999 · N4AN · Substantial damage
  > The separation of the nicopress fitting allowing a release of the rudder cable resulting in a loss of control during landing roll. A factor was the manufacturer's use of an improperly calibrated crimping tool.
- [NTSB NYC00MA048](https://openairdocs.org/ntsb/NYC00MA048.md): Israel Aircraft Industries 1124A · Gouldsboro, PA · Accident · 3 fatal · Major investigation · Final report · Dec 12, 1999 · N50PL · Destroyed
  > The improper assembly of the horizontal stabilizer trim actuator unit by maintenance personnel.
- [NTSB CHI00LA043](https://openairdocs.org/ntsb/CHI00LA043.md): McCarty Wittman W-8 Tailwind · Jamestown, ND · Accident · 2 fatal · Limited investigation · Final report · Dec 12, 1999 · N654 · Destroyed
  > the wing spar failure due to its inadequate construction by the owner/builder.
- [NTSB LAX00LA049](https://openairdocs.org/ntsb/LAX00LA049.md): Corbin/King Osprey 2 · Chula Vista, CA · Accident · 1 fatal · Limited investigation · Final report · Dec 6, 1999 · N192DC · Destroyed
  > The pilot exceeded the design stress limits of the airplane resulting in wing overload and separation.
- [NTSB DEN00IA023](https://openairdocs.org/ntsb/DEN00IA023.md): Boeing 767-232 · Salt Lake City, UT · Incident · No injuries · Incident investigation · Final report · Dec 6, 1999 · N111DN · Minor damage
  > Total failure of the main landing gear retract actuator due to stress corrosion caused by the use of a faulty sealant by company maintenance personnel that allowed moisture to enter the joint. A factor was the use of an improper fillet seal.
- [NTSB DEN00LA024](https://openairdocs.org/ntsb/DEN00LA024.md): Cessna 305A · Akron, CO · Accident · No injuries · Limited investigation · Final report · Dec 3, 1999 · N5245G · Substantial damage
  > The failure of the four bolts which attach the right main landing gear assembly to the landing gear strut.
- [NTSB LAX00LA045](https://openairdocs.org/ntsb/LAX00LA045.md): Lewis Stewart S-51 · Aguila, AZ · Accident · Serious injuries · Limited investigation · Final report · Nov 28, 1999 · N151L · Substantial damage
  > The jamming of a main landing gear in its wheel well for undetermined reasons.
- [NTSB SEA00LA025](https://openairdocs.org/ntsb/SEA00LA025.md): Dassault DA-20 · Boise, ID · Accident · No injuries · Limited investigation · Final report · Nov 27, 1999 · N216SA · Substantial damage
  > Failure of the forward gear door lock pin. An inoperative landing gear door and inadequate maintenance inspection of the aircraft were factors.
- [NTSB MIA00FA030](https://openairdocs.org/ntsb/MIA00FA030.md): Bell 212 · Philadelphia, MS · Accident · 2 fatal · Field investigation · Final report · Nov 27, 1999 · N8144M · Destroyed
  > The failure of the pilot and company maintenance personnel during preflight and periodic inspections to identify the signs of fretting and looseness in the "red" main rotor blade pitch change horn to main rotor blade grip attachment, resulting in the…
- [NTSB LAX00TA051](https://openairdocs.org/ntsb/LAX00TA051.md): de Havilland DHC-7 · Kwajalein, Marshall Islands · Accident · No injuries · Final report · Nov 27, 1999 · N273EP · Substantial damage
  > The failure of the flight crew to properly execute the emergency landing gear extension procedure in response to a landing gear unsafe cockpit indication.
- [NTSB CHI00LA038](https://openairdocs.org/ntsb/CHI00LA038.md): Cessna 310Q · Moline, IL · Accident · No injuries · Limited investigation · Final report · Nov 26, 1999 · N7762Q · Substantial damage
  > the landing gear locking mechanism was not properly locked. Factors relating to this accident were the improper rigging of the gear and the runway marker.
- [NTSB NYC00IA036](https://openairdocs.org/ntsb/NYC00IA036.md): Boeing 767-200 · Jamaica, NY · Incident · No injuries · Incident investigation · Final report · Nov 21, 1999 · N610UA · No damage
  > Total failure of the stabilizer control system for undetermined reasons.
- [NTSB DEN00LA020](https://openairdocs.org/ntsb/DEN00LA020.md): Cessna 210D · Sheridan, WY · Accident · No injuries · Limited investigation · Final report · Nov 21, 1999 · N3928Y · Substantial damage
  > The partial failure of the engine driven hydraulic pump.
- [NTSB SEA00LA018](https://openairdocs.org/ntsb/SEA00LA018.md): Piper PA18 · Malheur City, OR · Accident · Minor injuries · Limited investigation · Final report · Nov 13, 1999 · N82553 · Destroyed
  > The pilot's excessive descent rate during an attempted precautionary landing. Factors include the pilot's intentional operation of his aircraft with a known electrical system deficiency, a malfunction of the electrical system while in flight, the pilot's…
- [NTSB SEA00IA019](https://openairdocs.org/ntsb/SEA00IA019.md): Boeing 737-400 · Portland, OR · Incident · No injuries · Incident investigation · Final report · Nov 11, 1999 · N772AS · Minor damage
  > Arcing in the electrical system wiring for undetermined reasons.
- [NTSB SEA00TA013](https://openairdocs.org/ntsb/SEA00TA013.md): Hiller UH-12E · Stites, ID · Accident · Serious injuries · Final report · Nov 2, 1999 · N5388V · Substantial damage
  > Inadequate inspection of the control rotor cuff by a company mechanic and subsequent fatigue fracture of the cuff, resulting in an inflight separation of the control rotor blade. Factors contributing to the accident were: inadequate quality control during…
- [NTSB CHI00IA018](https://openairdocs.org/ntsb/CHI00IA018.md): Boeing 757-222 · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Oct 29, 1999 · N575UA · No damage
  > the in-flight vibration of the airplane's elevator due to excessive freeplay in the elevator control system. Factors included the corrosion of the elevator PCA reaction link bearings and the elevator hinge bearings, excessive axial and radial wear of the…
- [NTSB IAD00LA002](https://openairdocs.org/ntsb/IAD00LA002.md): Loral GZ-22 · Mogadore, OH · Accident · Minor injuries · Limited investigation · Final report · Oct 28, 1999 · N4A · Substantial damage
  > The failure of the flight control system manufacturer to meet design (hardness) specifications that resulted in stripped splines.
- [NTSB NYC00LA021](https://openairdocs.org/ntsb/NYC00LA021.md): Eurocopter AS-350-BA · Westbury, NY · Accident · No injuries · Limited investigation · Final report · Oct 27, 1999 · N350SL · Substantial damage
  > the failure of the operator to ensure the pilot was adequately trained to conduct all inspections required by the flight manual, which resulted in the pilot's inadequate preflight and subsequent failure of the tail rotor pitch change rod. Factors were the…
- [NTSB DEN00LA013](https://openairdocs.org/ntsb/DEN00LA013.md): Bellanca 8KCAB · Grand Junction, CO · Accident · No injuries · Limited investigation · Final report · Oct 27, 1999 · N8707V · Substantial damage
  > A failure of the left main landing gear attachment (u-bolt) due to fatigue.
- [NTSB LAX00GA025](https://openairdocs.org/ntsb/LAX00GA025.md): McDonnell Douglas 500N · San Jose, CA · Accident · 2 fatal · Final report · Oct 25, 1999 · N904PD · Destroyed
  > The pilot's in-flight loss of control due to the failure and separation of the forward thruster control cable telescoping sleeve ball swivel fitting, which resulted in a stuck thruster and the entry into an uncontrollable yaw/spin. Also causal was the…
- [NTSB DCA00MA005](https://openairdocs.org/ntsb/DCA00MA005.md): Learjet 35 · Aberdeen, SD · Accident · 6 fatal · Class 1 · Major · Final report · Oct 25, 1999 · N47BA · Destroyed
  > Incapacitation of the flight crewmembers as a result of their failure to receive supplemental oxygen following a loss of cabin pressurization, for undetermined reasons.
- [NTSB MIA00LA013](https://openairdocs.org/ntsb/MIA00LA013.md): British Aerospace HS 125-700A · Fayetteville, NC · Accident · No injuries · Limited investigation · Final report · Oct 19, 1999 · N34GG · Substantial damage
  > The overstress failure of the lugs of the cylinder head of the left main landing gear jack for undetermined reasons. Also, inability of the flight crew to extend the left main landing gear.
- [NTSB LAX00LA019](https://openairdocs.org/ntsb/LAX00LA019.md): Cessna TR182 · Fresno, CA · Accident · No injuries · Limited investigation · Final report · Oct 19, 1999 · N756LE · Substantial damage
  > Inadequate maintenance inspection mandated by the FAA, and the inadequate design of the exhaust heater core/muffler and deflectors that failed to divert hot exhaust gasses away from the battery and cabin heat valve.
- [NTSB FTW00LA012](https://openairdocs.org/ntsb/FTW00LA012.md): Air Tractor AT-301 · Olton, TX · Accident · Minor injuries · Limited investigation · Final report · Oct 14, 1999 · N23930 · Substantial damage
  > The inflight separation of the propeller blade due to damage from a wire strike. A factor was the lack of suitable terrain for the forced landing.
- [NTSB CHI00IA009](https://openairdocs.org/ntsb/CHI00IA009.md): McDonnell Douglas DC-9-51 · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Oct 14, 1999 · N766NC · No damage
  > The landing gear's wheel separation due to the improper installation of the wheel by company maintenance personnel using incomplete maintenance steps, and the maintenance steps not listed in the manufacturer's manual. Factors were the airport perimeter wall…
- [NTSB FTW00LA030](https://openairdocs.org/ntsb/FTW00LA030.md): Air Tractor AT-802A · Lamesa, TX · Accident · No injuries · Limited investigation · Final report · Oct 11, 1999 · N6044A · Substantial damage
  > The separation of the rudder control cable at the aft fairlead, as a result of wear.
- [NTSB FTW00LA010](https://openairdocs.org/ntsb/FTW00LA010.md): Piper PA-18-150 · Granite, OK · Accident · Serious injuries · Limited investigation · Final report · Oct 11, 1999 · N4473A · Substantial damage
  > Corrosion failure of the fuselage support tubing below the right wing forward attach fitting due to inadequate maintenance.
- [NTSB NYC00LA005](https://openairdocs.org/ntsb/NYC00LA005.md): McDonnell Douglas MD-11F · Newark, NJ · Accident · No injuries · Limited investigation · Final report · Oct 5, 1999 · N606FE · Substantial damage
  > A divergent, longitudinal oscillation of undetermined origin on the center landing gear, which caused a failure of the center landing gear lower drag brace during landing roll.
- [NTSB FTW99LA272](https://openairdocs.org/ntsb/FTW99LA272.md): Cessna 150F · Poteau, OK · Accident · 1 fatal · Limited investigation · Final report · Oct 1, 1999 · N8092S · Substantial damage
  > The instructor pilot's inadequate in-flight decision making, which resulted in the continued flight with a disabled generator and subsequent total failure of the electrical system. Factors were the installation of the inadequate generator fuse by unknown…
- [NTSB MIA99FA267](https://openairdocs.org/ntsb/MIA99FA267.md): Learjet 24 · Gainesville, GA · Accident · Serious injuries · Field investigation · Final report · Sep 26, 1999 · N224SC · Substantial damage
  > The inadequate inspection of the main landing gear brake assemblies, which lead to operation of the aircraft with worn brakes that failed during the landing roll. Contributing factors were the descending terrain, roadway and ditch.
- [NTSB LAX99FA317](https://openairdocs.org/ntsb/LAX99FA317.md): Kaman HH-43F · Phoenix, AZ · Accident · 2 fatal · Field investigation · Final report · Sep 25, 1999 · N100PL · Destroyed
  > Failure of the horizontal stabilizer left outboard forward attach point because of a previously existing crack that resulted from inadequate maintenance inspection by the operator. A factor was the use of automotive parts.
- [NTSB FTW99FA265](https://openairdocs.org/ntsb/FTW99FA265.md): Carter Spacewalker II · Conroe, TX · Accident · 2 fatal · Field investigation · Final report · Sep 25, 1999 · N235FC · Destroyed
  > The in-flight separation of the left wing due to the failure of the wing spars resulting from the builder's improper design change utilizing basswood for the spars instead of the specified spruce.
- [NTSB MIA99LA270](https://openairdocs.org/ntsb/MIA99LA270.md): Cessna 172RG · Orlando, FL · Accident · No injuries · Limited investigation · Final report · Sep 24, 1999 · N9536B · Substantial damage
  > the pilot's failure to ensure that the landing gear was down and locked following loss of electrical power for undetermined reasons, resulting in substantial damage to the airplane when the right main landing gear collapsed upon landing.
- [NTSB ANC99LA152](https://openairdocs.org/ntsb/ANC99LA152.md): Maule ML-4 · Anchorage, AK · Accident · Minor injuries · Limited investigation · Final report · Sep 24, 1999 · N4623T · Substantial damage
  > The improper (reversed) connection of the elevator control cables by the owner/pilot-mechanic, and the failure to have the installation inspected by another mechanic.
- [NTSB SEA99LA171](https://openairdocs.org/ntsb/SEA99LA171.md): Garlick UH-1H · Usk, WA · Accident · No injuries · Limited investigation · Final report · Sep 21, 1999 · N32800 · Substantial damage
  > Fatigue failure of the 90-degree gearbox attachment studs, resulting in separation of the tailrotor and 90-degree gearbox from the vertical fin.
- [NTSB IAD99LA068](https://openairdocs.org/ntsb/IAD99LA068.md): Cessna 172P · Friendly, MD · Accident · No injuries · Limited investigation · Final report · Sep 21, 1999 · N63325 · Substantial damage
  > The pilot's misjudgment of speed during the landing approach. The inoperative airspeed indicator was a contributing factor.
- [NTSB LAX99FA315](https://openairdocs.org/ntsb/LAX99FA315.md): Boeing 757-2S7 · Agua Caliente, AZ · Accident · Serious injuries · Field investigation · Final report · Sep 20, 1999 · N904AW · No damage
  > the systemic failure of the airline's maintenance department to identify and correct the long standing history of intermittent faults, nuisance warnings, and erratic behavior in this airplane's GPWS system. Also causal is the airline's failure to perform the…
- [NTSB LAX99FA311](https://openairdocs.org/ntsb/LAX99FA311.md): No American/Rogers B L P-51R · Reno, NV · Accident · 1 fatal · Field investigation · Final report · Sep 18, 1999 · N57LR · Destroyed
  > The onset of a flutter event and the resultant separation of the rudder and empennage from the aircraft. The precipitating cause for the flutter could not be determined.
- [NTSB ANC99LA145](https://openairdocs.org/ntsb/ANC99LA145.md): Cessna 185F · Delta Junction, AK · Accident · Minor injuries · Limited investigation · Final report · Sep 15, 1999 · N85LC · Substantial damage
  > Corrosion and a fatigue failure of the lower end of the landing gear strut. Factors in the accident were the manufacturer's and the FAA's insufficient standards/requirements for life limits and inspection procedures.
- [NTSB FTW99LA267](https://openairdocs.org/ntsb/FTW99LA267.md): Aeronca 11AC · Van Horn, TX · Accident · No injuries · Limited investigation · Final report · Sep 9, 1999 · N9044E · Substantial damage
  > A restriction within the auxiliary fuel supply system and the rough terrain during the subsequent precautionary landing resulting on main gear collapse.
- [NTSB MIA99LA265](https://openairdocs.org/ntsb/MIA99LA265.md): Piper PA-24-250 · Naples, FL · Accident · No injuries · Limited investigation · Final report · Sep 8, 1999 · N980AC · Substantial damage
  > The pilot's failure to perform manual gear extension procedures with a suspected unsafe landing gear indication which resulted in a collapse of the main landing gear on landing rollout. A factor in the accident was the pilot's lack of total experience in kind…
- [NTSB ATL99LA124](https://openairdocs.org/ntsb/ATL99LA124.md): Cessna 190 · Enterprise, AL · Accident · No injuries · Limited investigation · Final report · Sep 5, 1999 · N9872A · Substantial damage
  > The fatigue failure of the main landing gear spring.
- [NTSB MIA99LA242](https://openairdocs.org/ntsb/MIA99LA242.md): Sukhoi SU-29 · Fort Lauderdale, FL · Accident · Serious injuries · Limited investigation · Final report · Sep 1, 1999 · N52PB · Destroyed
  > an in-flight failure of the right aileron due to fatigue cracking in the attachment structure of the right inboard aerodynamic compensator, which resulted in a loss of control, a forced landing, and subsequent impact with the ground.
- [NTSB LAX99LA283](https://openairdocs.org/ntsb/LAX99LA283.md): Bell UH-1B · Lost Hills, CA · Accident · No injuries · Limited investigation · Final report · Aug 25, 1999 · N999SJ · Substantial damage
  > Failure and separation of the 90-degree gearbox as a result of the disengagement of the pinion and gear teeth. The cause(s) of the pinion and gear disengagement were undetermined.
- [NTSB IAD99IA059](https://openairdocs.org/ntsb/IAD99IA059.md): Boeing 727-200 · Washington, DC · Incident · No injuries · Incident investigation · Final report · Aug 23, 1999 · N926TS · Minor damage
  > The inadequate lubrication of the landing gear side strut assembly by company maintenance personnel. A factor in the accident was the inadequate design of the assembly that trapped water and prevented adequate lubrication.

Next page: https://openairdocs.org/ntsb.md?year=1999&occurrence=130&page=2

## 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 year(c."eventDate") = 1999
  AND 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&year=1999

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