# NTSB DEN72FTC13: Aero Comdr 520, N4168B, Sinclair, WY, October 18, 1971 - Type: NTSB accident investigation - Classification: Accident · No injuries · Closed - Date: October 18, 1971 - Place: Sinclair, WY · SINCLAIR, WY - Location: 41.7761° N, 107.1199° W: Placed by OpenAirDocs: center of Sinclair, WY, within about 6 miles (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=41.7761&lon=-107.1199&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report February 7, 1972 - Report: Brief approved by the director - NTSB case key (mKey): 163536 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN72FTC13 - Page: https://openairdocs.org/ntsb/DEN72FTC13 ## NTSB brief ``` ----------------------------------------------------------------------------------------------------------------------------  FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA                                                                F  S M/N     PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-1970  71/10/18   SINCLAIR,WYO        AERO COMDR 520      CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 25, 2016         TIME - 1330                    N4168B              PX-  0  0  0  FERRY                     TOTAL HOURS, 36 IN TYPE,                                        DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.         DEPARTURE POINT             INTENDED DESTINATION           SALT LAKE CITY,UT           SCOTTS BLUFF,NEBR         TYPE OF ACCIDENT                                         PHASE OF OPERATION            ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE            COLLISION WITH GROUND/WATER: CONTROLLED                  IN FLIGHT: OTHER         PROBABLE CAUSE(S)            PILOT IN COMMAND - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS            MISCELLANEOUS ACTS,CONDITIONS - ANTI-ICING/DEICING EQUIPMENT-IMPROPER OPERATION OF/OR FAILED TO USE            MISCELLANEOUS ACTS,CONDITIONS - ICE-CARBURETOR            PILOT IN COMMAND - ATTEMPTED OPERATION W/KNOWN DEFICIENCIES IN EQUIPMENT            PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.            MISCELLANEOUS ACTS,CONDITIONS - IMPROPER EMERGENCY PROCEDURES         FACTOR(S)            MISCELLANEOUS ACTS,CONDITIONS - AIRFRAME ICE            WEATHER - ICING CONDITIONS-INCLUDES SLEET,FREEZING RAIN,ETC.            WEATHER - LOW CEILING            WEATHER - CONDITIONS CONDUCIVE TO CARB./INDUCTION SYSTEM ICING         PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE         WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, IN PERSON         WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT         SKY CONDITION                                            CEILING AT ACCIDENT SITE           PARTIAL OBSCURATION                                       400         VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE           2 MILES OR LESS                                          SNOW         OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F           NONE                                                      35         WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS           225                                                       15         TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN           IFR                                                      IFR         REMARKS- DE-ICING BOOTS INOP.LOST R ENG PWR.UN MAINTAIN FLT.DIDNT FEATH R ENG.HIT IN R TURN.GR,FLAPS DOWN. ``` ## Aircraft - Registration: [N4168B](https://openairdocs.org/deregistered/N4168B-2012-11-20), registration cancelled 2012-11-20, S/N 520-74, built 1953 (OpenAirDocs) - Reported make and model: AERO COMDR 520 - Registry model: [Aero Commander 520](https://openairdocs.org/model/aero-commander-520) (registry code 0141202) (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: Substantial damage 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.