# NTSB investigations: CFM International CFM56 series

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 5 of 6 · 255 cases

## Cases, newest first

- [NTSB SEA98IA027](https://openairdocs.org/ntsb/SEA98IA027.md): Boeing 737-522 · Eugene, OR · Incident · No injuries · Incident investigation · Final report · Dec 26, 1997 · N918UA · No damage
  > A checklist procedure was not followed. The initiation of an evacuation was a factor.
- [NTSB MIA97IA237](https://openairdocs.org/ntsb/MIA97IA237.md): Boeing 737-300 · Tampa, FL · Incident · Minor injuries · Incident investigation · Final report · Aug 21, 1997 · N602SW · Minor damage
  > in-flight collision with a bird.
- [NTSB LAX97IA243](https://openairdocs.org/ntsb/LAX97IA243.md): Boeing 737-522 · Ontario, CA · Incident · No injuries · Incident investigation · Final report · Jul 15, 1997 · N956UA · No damage
  > a laser light source of undetermined origin directed toward the cockpit window of an aircraft in-flight by a person or persons unknown.
- [NTSB FTW97IA187](https://openairdocs.org/ntsb/FTW97IA187.md): Boeing 737-524 · Corpus Christi, TX · Incident · No injuries · Incident investigation · Final report · May 11, 1997 · N16618 · No damage
  > The flightcrew's inadequate in-flight planning and decision, and their failure to refer to the navaids needed for the instrument approach procedure. A factor was the lack of a minimum safe altitude warning from approach control.
- [NTSB LAX97IA161](https://openairdocs.org/ntsb/LAX97IA161.md): Boeing 737-500 · Rialto, CA · Incident · Minor injuries · Incident investigation · Final report · Apr 17, 1997 · N930UA · No damage
  > a laser light source of undetermined origin, directed by unknown person(s) toward the cockpit window of the aircraft, while the aircraft was on an approach to land.
- [NTSB SEA97IA071](https://openairdocs.org/ntsb/SEA97IA071.md): McDonnell Douglas DC-8-71F · Portland, OR · Incident · No injuries · Incident investigation · Final report · Mar 12, 1997 · N830BX · No damage
  > improper installation of four attach bolts on the elevator drive torque tube.
- [NTSB ANC97LA015](https://openairdocs.org/ntsb/ANC97LA015.md): Boeing 737-400 · Yakutat, AK · Accident · Serious injuries · Limited investigation · Final report · Dec 22, 1996 · N775AS · No damage
  > an in-flight encounter with unforecast severe clear air turbulence.
- [NTSB CHI97IA034](https://openairdocs.org/ntsb/CHI97IA034.md): Airbus Industrie A-320-211 · Romulus, MI · Incident · No injuries · Incident investigation · Final report · Nov 24, 1996 · N310NW · No damage
  > restricted movement of the autopilot mode engagement/disengagement lever bearing in the rudder artificial feel and trim unit. A factor relating to this incident was: company management not implementing the respective service bulletin.
- [NTSB LAX97LA051](https://openairdocs.org/ntsb/LAX97LA051.md): Boeing 737-500 · Bishop, CA · Accident · Serious injuries · Limited investigation · Final report · Nov 20, 1996 · N916UA · No damage
  > a clear air turbulence encounter.
- [NTSB MIA96LA220](https://openairdocs.org/ntsb/MIA96LA220.md): Boeing 737-300 · Chattanooga, TN · Accident · Serious injuries · Limited investigation · Final report · Aug 29, 1996 · N392US · Minor damage
  > clear air turbulence, which was encountered during cruise flight and resulted in injuries to passengers.
- [NTSB CHI96IA207](https://openairdocs.org/ntsb/CHI96IA207.md): Airbus Industrie A-320 · Boston, MA · Incident · No injuries · Incident investigation · Final report · Jun 14, 1996 · N347NW · No damage
  > an undetermined intermittent fault in the trimmable horizontal stabilizer actuator system.
- [NTSB LAX96LA222](https://openairdocs.org/ntsb/LAX96LA222.md): Boeing 737-322 · San Francisco, CA · Accident · No injuries · Limited investigation · Final report · Jun 7, 1996 · N371UA · 2 aircraft · Substantial damage
  > inadequate visual lookout by the United Airlines tug driver during the pushback operation. Contributing factors were: the driver's reduced ability to observe the American B-767 due to the nighttime condition, and United Airlines management's failure to ensure…
- [NTSB LAX96IA184](https://openairdocs.org/ntsb/LAX96IA184.md): Boeing 737-300-3H4 · Ontario, CA · Incident · No injuries · Incident investigation · Final report · Apr 30, 1996 · N331SW · Minor damage
  > The repair facility's improper assembly of the landing gear oleo strut during overhaul.
- [NTSB CHI96IA109](https://openairdocs.org/ntsb/CHI96IA109.md): Airbus Industrie A320-211 · Detroit, MI · Incident · No injuries · Incident investigation · Final report · Mar 18, 1996 · N340NW · No damage
  > a defective diode in the number two stabilizer actuator that produced an intermittent loss of electrical motor power during transient, closed loop control of the actuator. A factor was the intermittent open circuit in the elevator servo controller…
- [NTSB SEA96LA026](https://openairdocs.org/ntsb/SEA96LA026.md): Boeing 737-522 · Portland, OR · Accident · Serious injuries · Limited investigation · Final report · Nov 25, 1995 · N953UA · No damage
  > An unexpected encounter with unforecast moderate high level windshear and turbulence as the flight attendant was performing his duties during descent.
- [NTSB NYC96IA022](https://openairdocs.org/ntsb/NYC96IA022.md): Boeing 737-3B7 · Portland, ME · Incident · No injuries · Incident investigation · Final report · Nov 2, 1995 · N373US · Minor damage
  > a bird strike during takeoff, which resulted in failure of several fan blades in the right engine and a partial loss of engine power.
- [NTSB LAX96IA032](https://openairdocs.org/ntsb/LAX96IA032.md): Boeing 737-5H4 · Las Vegas, NV · Incident · Minor injuries · Incident investigation · Final report · Oct 31, 1995 · N508SW · No damage
  > The flying pilot's inadvertent exposure to an unidentified ground-based laser beam. A factor in the incident is the lack of appropriate standards by the FAA and FDA for laser light exposure levels to aircrew in navigable airspace.
- [NTSB DCA96IA005](https://openairdocs.org/ntsb/DCA96IA005.md): Boeing B-737-500 · San Francisco, CA · Incident · No injuries · Incident investigation · Final report · Oct 29, 1995 · N904UA · No damage
  > The inadvertant stall for undertermined reasons.
- [NTSB MIA95IA214](https://openairdocs.org/ntsb/MIA95IA214.md): Boeing 737-3B7 · Fort Lauderdale, FL · Incident · No injuries · Incident investigation · Final report · Aug 25, 1995 · N373US · No damage
  > Low electrical resistance of the autopilot aileron actuator for unspecified reasons which resulted in an uncommanded roll to the right.
- [NTSB FTW95IA348](https://openairdocs.org/ntsb/FTW95IA348.md): Boeing 737-3H4 · Lubbock, TX · Incident · No injuries · Incident investigation · Final report · Aug 18, 1995 · N309SW · Minor damage
  > installation of an incorrect bearing in the number three main wheel by the wheel assembly supplier, which led to subsequent failure of the wheel bearing and separation of the wheel during takeoff.
- [NTSB FTW95FA319](https://openairdocs.org/ntsb/FTW95FA319.md): Boeing 737-3A4 · Dallas, TX · Accident · No injuries · Field investigation · Final report · Jul 28, 1995 · N675AA · 2 aircraft · Minor damage
  > Failure of the flightcrews of the Boeing 737, N675AA, and the Cessna 401, N31DB, to see and avoid each other. Factors were: the failure of 737 flightcrew to respond to the traffic advisory given by the ground controller identifying potentially conflicting…
- [NTSB MIA95IA187](https://openairdocs.org/ntsb/MIA95IA187.md): Boeing 737-3B7 · Orlando, FL · Incident · No injuries · Incident investigation · Final report · Jul 18, 1995 · N390US · No damage
  > Contamination of the wiring harness and electrical connectors to the E-1-2 and E-1-3 shelf disconnect brackets in the electronics compartment, which resulted in an electrical fault and an uncommanded roll malfunction of the autopilot. A factor relating to the…
- [NTSB CHI95LA170](https://openairdocs.org/ntsb/CHI95LA170.md): Airbus Industrie A-320-211 · St Paul, MN · Accident · No injuries · Limited investigation · Final report · Jun 3, 1995 · N326US · Substantial damage
  > the captain's not maintaining crew/group coordination. Factors were the captain's diverted attention and his not maintaining visual separation.
- [NTSB NYC95IA114](https://openairdocs.org/ntsb/NYC95IA114.md): Boeing 767-383ER · Newark, NJ · Incident · No injuries · Incident investigation · Final report · May 20, 1995 · LNRCK · 2 aircraft · Minor damage
  > the pilot of the B-767, LNRCK, misjudged clearance between his airplane and the B-737, N13624, resulting in an on-ground collision.
- [NTSB MIA95LA133](https://openairdocs.org/ntsb/MIA95LA133.md): Boeing 737-300 · Tallahassee, FL · Accident · Serious injuries · Limited investigation · Final report · May 19, 1995 · N60312 · No damage
  > The failure of a passenger to comply with flight crew instructions to remain seated with her seat belt fastened which resulted in her being injured while walking in the aisle during a turbulence encounter.
- [NTSB NYC95IA106](https://openairdocs.org/ntsb/NYC95IA106.md): Douglas DC-8-71 · Louisville, KY · Incident · No injuries · Incident investigation · Final report · May 13, 1995 · N707UP · Minor damage
  > preexisting crack(s) on the inside surface of the right main landing gear cylinder, and the subsequent fracture of the cylinder, which resulted in a collapse of the right main landing gear.
- [NTSB CHI95IA342](https://openairdocs.org/ntsb/CHI95IA342.md): Airbus Industrie A320-211 · Minneapolis, MN · Incident · No injuries · Incident investigation · Final report · Apr 28, 1995 · N331NW · No damage
  > inadequate design of the fly-by-wire flight control system which allowed false signals from the sidestick transducer units to generate uncommanded rolls.
- [NTSB CHI95IA138](https://openairdocs.org/ntsb/CHI95IA138.md): Airbus Industrie A320-211 · Washington, DC · Incident · No injuries · Incident investigation · Final report · Apr 27, 1995 · N331NW · No damage
  > the pilot's excessive use of the flight controls during the landing approach, the company's disregard of information provided by the airplane manufacturer, and the company's failure to identify a potentially hazardous conditions based on the information…
- [NTSB LAX95IA086](https://openairdocs.org/ntsb/LAX95IA086.md): Boeing 737-300 · Albuquerque, NM · Incident · No injuries · Incident investigation · Final report · Jan 24, 1995 · N155AW · No damage
  > maintenance personnel inadvertently overservicing the left main landing gear strut with nitrogen that, during rotation with the aircraft weight on the strut reduced, gave the pilots a rolling sensation to the right.
- [NTSB FTW95IA083](https://openairdocs.org/ntsb/FTW95IA083.md): Boeing 737-3A4 · Houston, TX · Incident · No injuries · Incident investigation · Final report · Jan 1, 1995 · N326SW · No damage
  > Encounter with wake turbulence.
- [NTSB CHI95LA049](https://openairdocs.org/ntsb/CHI95LA049.md): Douglas DC-8-71F · Chicago, IL · Accident · Serious injuries · Limited investigation · Final report · Nov 30, 1994 · N826BX · Minor damage
  > the failure of the ground crew to maintain an appropriate center of gravity while downloading cargo from the airplane. A factor was the ground crew's failure to follow established downloading procedures.
- [NTSB FTW95IA053](https://openairdocs.org/ntsb/FTW95IA053.md): Boeing B-737-300 · Houston, TX · Incident · No injuries · Incident investigation · Final report · Nov 26, 1994 · N14336 · Minor damage
  > The failure of maintenance personnel to follow the taxi checklist resulting in the hydraulic pumps not being turned on.
- [NTSB MIA94LA214](https://openairdocs.org/ntsb/MIA94LA214.md): Boeing 737-400 · Atlantic Ocean (Atlantic Ocean) · Accident · Serious injuries · Limited investigation · Final report · Sep 19, 1994 · N433US · No damage
  > The inflight encounter with turbulence in clouds.
- [NTSB CHI93IA354](https://openairdocs.org/ntsb/CHI93IA354.md): Boeing 737-300 · St. Louis, MO · Incident · No injuries · Incident investigation · Final report · Sep 8, 1993 · N350SW · Minor damage
  > a failure of the left outboard foreflap due to the loss of the bolts that hold the inboard sequencing carriage to the foreflap attach lug.
- [NTSB DEN93IA044](https://openairdocs.org/ntsb/DEN93IA044.md): Boeing 737-522 · Denver, CO · Incident · No injuries · Incident investigation · Final report · Apr 24, 1993 · N905UA · No damage
  > The pilot-in-command's failure to maintain adequate separation from the Boeing 757, and his failure to stay above the probable path of the Boeing's wake vortices, which resulted in the vortex encounter. Factors related to the accident were: the crosswind, and…
- [NTSB NYC93LA040](https://openairdocs.org/ntsb/NYC93LA040.md): Boeing 737-300LR · Flushing, NY · Accident · 1 fatal · Limited investigation · Final report · Dec 8, 1992 · N516AU · No damage
  > A lack of adequate clearance between the walker and tug which resulted in the walker being struck by the tug when he fell for unknown reason(s). A factor related to the accident was the lack of a policy to stay clear of the tug, towbar, and nosewheel of the…
- [NTSB FTW92LA200](https://openairdocs.org/ntsb/FTW92LA200.md): Boeing 737-300 · Springfield, MO · Accident · Serious injuries · Limited investigation · Final report · Aug 3, 1992 · N357SW · No damage
  > The encounter with severe turbulence while deviating around convective activity.
- [NTSB LAX90IA293](https://openairdocs.org/ntsb/LAX90IA293.md): Boeing 737-322 · Los Angeles, CA · Incident · No injuries · Incident investigation · Final report · Aug 21, 1990 · N305UA · Minor damage
  > Improper maintenance service by a company employee who allowed a foreign object (flashlight) to remain in the landing gear extend/retract linkage during a night servicing before the flight.
- [NTSB DCA90IA048](https://openairdocs.org/ntsb/DCA90IA048.md): Airbus Industrie A320-211 · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Aug 10, 1990 · N306US · Minor damage
  > The pilot(s) allowed the aircraft to rotate to an excessive nose high attitude, either during a takeoff or landing.
- [NTSB FTW90LA156](https://openairdocs.org/ntsb/FTW90LA156.md): Boeing B-737-300 · Corpus Christi, TX · Accident · Serious injuries · Limited investigation · Final report · Aug 9, 1990 · N327SW · No damage
  > The airplane's unexpected encounter with clear air turbulence.
- [NTSB MKC90IA070](https://openairdocs.org/ntsb/MKC90IA070.md): Boeing 737-300 · Wichita, KS · Incident · Minor injuries · Incident investigation · Final report · Mar 17, 1990 · N17317 · Minor damage
  > Improper installation of level arm.
- [NTSB LAX90LA122](https://openairdocs.org/ntsb/LAX90LA122.md): Boeing 737-300 · Santa Ana, CA · Accident · No injuries · Limited investigation · Final report · Mar 17, 1990 · N306AW · Substantial damage
  > The pilot's improper rotation during takeoff.
- [NTSB CHI90IA070](https://openairdocs.org/ntsb/CHI90IA070.md): Boeing B737-300 · Cedar Rapids, IA · Incident · No injuries · Incident investigation · Final report · Jan 20, 1990 · N338UA · Minor damage
  > The failure of all four main landing gear tires on takeoff due to the parking brake being locked.
- [NTSB ATL89IA187](https://openairdocs.org/ntsb/ATL89IA187.md): Boeing 737-400 · Greensboro, NC · Incident · No injuries · Incident investigation · Final report · Aug 2, 1989 · N413US · Minor damage
  > Failure of the line mechanic, a check mechanic, and first officer to identify and remove the wheel chock from the wheel well during the required inspections.
- [NTSB DCA89MA034](https://openairdocs.org/ntsb/DCA89MA034.md): Boeing 737-300 · Oakland, CA · Accident · No injuries · Major investigation · Final report · Mar 17, 1989 · N12318 · Substantial damage
  > Ignition of puddled fuel from a blocked combustor drain line, and a slow start during which fuel was misted and blown out the tail pipe. An existing tailwind at the gate allowed the fuel to wet the tail surfaces and be ignited during the APU start. The…
- [NTSB FTW88IA141](https://openairdocs.org/ntsb/FTW88IA141.md): Boeing 737-300 · Kenton, DE · Incident · No injuries · Incident investigation · Final report · Jul 26, 1988 · N14336 · Minor damage
  > A flameout of the #1 engine occurred due to water ingestion when the aircraft penetrated a vip level 5 thunderstorm and encountered heavy rain while descending with the throttles a flight idle. The engine suffered overtemperature damage to the turbine section…
- [NTSB SEA88IA121](https://openairdocs.org/ntsb/SEA88IA121.md): Mcdonnell Douglas DC-8-73F · Seattle, WA · Incident · No injuries · Incident investigation · Final report · Jun 30, 1988 · N791FT · Minor damage
  > Crew noted inflight indications of loss of hydraulic fluid, then carried out standard procedures per crew manual. Emerg hyd sys used to lower flaps for lndg. Acft landed with four right brakes locked. The tires blew and the wheels were ground flat.…
- [NTSB NYC88IA109](https://openairdocs.org/ntsb/NYC88IA109.md): Boeing 737 · Morristown, NJ · Incident · No injuries · Incident investigation · Final report · Mar 19, 1988 · N69348 · 2 aircraft · No damage
  > Boeing 737 (N69348) was depg newark intl arpt as a lear jet 24 (N500NH) was depg fm teterboro. Both were being ctld by new york TRACON (newark sector). The strip for the 737 was mismarked as a north departure rather than an east departure. The instructor/full…
- [NTSB CHI88IA015](https://openairdocs.org/ntsb/CHI88IA015.md): Boeing 737-322 · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Oct 29, 1987 · N305UA · 2 aircraft · No damage
  > The south rwys (32L, 9R, & 4R) were being ctld by the south LCL ctlr (slc) & the north rwys (9L & 4L) were ctld by the north LCL ctlr (nlc). At 1543:26, slc told united flt 973 (Boeing 737) to hold on 32L & expect a 3 min delay bfr tkof. Air Wisconsin flt 954…
- [NTSB FTW87LA082](https://openairdocs.org/ntsb/FTW87LA082.md): Boeing 737-300 · Midland, TX · Accident · Serious injuries · Limited investigation · Final report · Mar 17, 1987 · N314SW · No damage
  > While penetrating a line of thunderstorms at 35,000 en route to Midland, TX, from dallas, TX, severe turbulence was encountered. One flight attendant had just sat down but had not fastened his seat belt and was thrown to the floor sustaining serious injuries.

Next page: https://openairdocs.org/ntsb.md?engine=13802&page=6

## 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 x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('13802'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=13802&page=5

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