# NTSB LAX68A0084: Hughes 269B, N19543, Carlsbad, CA, March 5, 1968

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: March 5, 1968
- Place: Carlsbad, CA · CARLSBAD, CA
- Location: 33.1581° N, 117.3506° W: Placed by OpenAirDocs: center of Carlsbad, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.1581&lon=-117.3506&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report May 13, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 111463
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX68A0084
- Page: https://openairdocs.org/ntsb/LAX68A0084

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0770   68/3/5    CARLSBAD,CALIF      HUGHES 269B         CR-  0  0  2  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 0810                    N19543              PX-  0  0  0  TEST                      AGE 49, 6391 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            2057 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - PALOMAR HELIPAD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      TAXI: AERIAL TAXI TO/FROM LANDING
           AIRFRAME FAILURE: ON GROUND                              STATIC: IDLING ROTORS
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: MAIN ROTOR GEAR BOX
           MISCELLANEOUS ACTS,CONDITIONS - LACK OF LUBRICATION-SPECIFIC PART,NOT SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - OBSTRUCTED
           MISCELLANEOUS - FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: SUBSTANDARD QUALITY CONTROL
           MISCELLANEOUS ACTS,CONDITIONS - GROUND RESONANCE
        REMARKS- TENSION FAILURE OF BLADES.AFT PINION BEARING SEIZED.POL RESIN CAUGHT ON BURRS OF DRILLED OIL PORT.
```

## Aircraft

- Registration: N19543 (not matched to a registry record)
- Reported make and model: HUGHES 269B
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Palomar Helipad

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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