LAX00TA186 · McDonnell Douglas 500N
McDonnell Douglas 500N · Accident: on ground/water collision with terrain/water during landing
From Long Beach International Airport (LGB) to an unrecorded destination
Narrative check · The NTSB narrative appears to contradict this record's operation. Values are shown as recorded, not corrected; compare with the narrative.
Event
- NTSB case
- LAX00TA186
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation Possible conflict
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
McDonnell Douglas 500N
- Aircraft type
- McDonnell Douglas 500
- Category
- Helicopter
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N955SD
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Long Beach International Airport (LGB), Long Beach, CATo not recorded
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Landing · landing roll
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- On ground/water collision with terrain/water
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Check pilot › Unsuitable terrain or takeoff/landing/taxi area, not verified
- Company/operator management › Procedure inadequate
- Company/operator management › Proper assistance, not obtained
Approximate · Estimated position: the centre of Los Angeles, CA, the place the record names. Not the accident site.
NTSB narrative
The flight instructor reported the purpose of the flight was to practice emergency procedures as part of routine intradepartmental training. The training was being conducted in an open field on property owned by the Sheriff's Department. The flight instructor stated that they often utilized the field for flight training purposes, and reported that he had done some training there about 1-week prior. He reported that they performed a high reconnaissance of the field prior to landing and he noted nothing unsuitable about the terrain. A ground survey was not performed prior to the conduct of training flights and landings in the field. The flight instructor stated that he reduced the throttle to ground idle about 10 to 12 feet agl to simulate a total power loss. The pilot trainee was on the controls; he landed the helicopter with no problems. The flight instructor stated that the helicopter slid forward only a few feet, then stopped abruptly. The skids had become entangled in some 18-inch-tall grass and imbedded vines, causing unexpected friction. He stated that the natural tendency to input aft cyclic to stop the aircraft from going over caused the main rotor blades to contact the tail boom.
Probable cause
The combined failure of the operator management and the check pilot to ensure the landing area was suitable for the slide on landing. Factors were the high vegetation that entangled the skids, resulting in the abrupt stop and nose down movement of the helicopter, and the training pilot's inappropriate response to the nose pitch down.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX00TA186
- Event ID
- 20001212X21054
- Case number
- LAX00TA186
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 6cb9427cf3f223b51a8c64716a87199e01c9d873d6a8d1b94744e7acf30b6dcc; retrieved 2026-09-22T12:54:50.390Z.