# NTSB NYC69A0008: Helio H-391B, N28B, Royalston, MA, July 10, 1968 - Type: NTSB accident investigation - Classification: Accident · Fatal · Closed - Date: July 10, 1968 - Place: Royalston, MA · ROYALSTON, MA - Location: 42.6776° N, 72.1879° W: Placed by OpenAirDocs: center of Royalston, MA, within about 6 miles (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=42.6776&lon=-72.1879&mi=10 - Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 2 fatal - Status: Completed, report June 30, 1970 - Report: Brief approved by the director - NTSB case key (mKey): 109643 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC69A0008 - Page: https://openairdocs.org/ntsb/NYC69A0008 ## NTSB brief (aircraft 2) ``` ----------------------------------------------------------------------------------------------------------------------------  FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA                                                                F  S M/N     PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-4665  68/7/10    ROYALSTON,MASS      HELIO ACFT H-391B   CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 48, UNK/NR         TIME - 1459                    N28B                PX-  1  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, UNK/NR IN                                        DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, NOT INSTRUMENT                                                                                                    RATED.         DEPARTURE POINT             INTENDED DESTINATION           OLD FORGE,NY                OSTERVILLE,MASS         TYPE OF ACCIDENT                                         PHASE OF OPERATION            AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: UNCONTROLLED DESCENT         PROBABLE CAUSE(S)            PILOT IN COMMAND - CONTINUED FLIGHT INTO KNOWN AREAS OF SEVERE TURBULENCE            PILOT IN COMMAND - SPATIAL DISORIENTATION            PILOT IN COMMAND - EXCEEDED DESIGNED STRESS LIMITS OF AIRCRAFT            MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE         FACTOR(S)            WEATHER - THUNDERSTORM ACTIVITY            WEATHER - TURBULENCE, ASSOCIATED W/CLOUDS AND/OR THUNDERSTORMS            MISCELLANEOUS ACTS,CONDITIONS - SEAT BELT NOT FASTENED            MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT         WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY PHONE         WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT         SKY CONDITION                                            CEILING AT ACCIDENT SITE           UNKNOWN/NOT REPORTED                                     UNKNOWN/NOT REPORTED         VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE           UNKNOWN/NOT REPORTED                                     THUNDERSTORM         OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS           UNKNOWN/NOT REPORTED                                     VFR         TYPE OF FLIGHT PLAN           NONE         REMARKS- WITNESS STATED WX BRIEF RECEIVED.GEN DISINTERGRATION IN FLT. ``` ## NTSB brief (aircraft 1) ``` ----------------------------------------------------------------------------------------------------------------------------  FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA                                                                F  S M/N     PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-4665  68/7/10    ROYALSTON,MASS      HELIO H-391B        CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 48, 2500         TIME - 1459                    N28B                PX-  1  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, UNK/NR IN                                        DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, NOT INSTRUMENT                                                                                                    RATED.         TYPE OF ACCIDENT                                         PHASE OF OPERATION            AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: OTHER         REMARKS- UNDER INVESTIGATION. ``` ## Aircraft 1 - Registration: [N28B](https://openairdocs.org/deregistered/N28B-2012-09-21), registration cancelled 2012-09-21, S/N 005, built 1955 (OpenAirDocs) - Reported make and model: HELIO H-391B - Registry model: [Helio H-391B](https://openairdocs.org/model/helio-h-391b) (registry code 4300106) (OpenAirDocs) - Registry engine: [Lycoming GO-435C&D series](https://openairdocs.org/engine/lycoming-go-435c-d-series) (registry code 41521, reciprocating) (OpenAirDocs) - Category: Airplane - Engines: reciprocating - Damage: Destroyed ## Aircraft 2 - Registration: [N28B](https://openairdocs.org/deregistered/N28B-2012-09-21), registration cancelled 2012-09-21, S/N 005, built 1955 (OpenAirDocs) - Reported make and model: HELIO ACFT H-391B - Registry model: [Helio H-391B](https://openairdocs.org/model/helio-h-391b) (registry code 4300106) (OpenAirDocs) - Registry engine: [Lycoming GO-435C&D series](https://openairdocs.org/engine/lycoming-go-435c-d-series) (registry code 41521, reciprocating) (OpenAirDocs) - Category: Airplane - Engines: reciprocating - Damage: Destroyed 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. --- 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.