# NTSB ANC81IA014: Boeing 737, N4907, Mt Mckinley, AK, January 31, 1980

- Type: NTSB incident investigation
- Classification: Incident · Minor injuries · Closed
- Date: January 31, 1980
- Place: Mt Mckinley, AK · MT MCKINLEY, AK
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 4 minor, 106 uninjured
- Status: Completed, report February 18, 1981
- Report: Brief approved by the director
- NTSB case key (mKey): 131680
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC81IA014
- Page: https://openairdocs.org/ntsb/ANC81IA014

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0010  80/1/31  NR.MT MCKINLEY,AK     BOEING 737          CR-  0  0  5  SCHED DOM PASSG SRV       ATP,FLIGHT INSTR., AGE
        TIME - 1230                    N4907               PX-  0  0105                            55, 42000 TOTAL HOURS,
                                       DAMAGE-MINOR        OT-  0  0  0                            6850 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - WIEN AIR ALASKA
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          DEADHORSE,AK                ANCHORAGE,AK                 FAIRBANKS,AK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           TURBULENCE                                               IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           WEATHER - DOWNDRAFT,UPDRAFTS
           WEATHER - TURBULENCE, ASSOCIATED W/CLOUDS AND/OR THUNDERSTORMS
           PERSONNEL - FLIGHT PERSONNEL: FLIGHT ATTENDANT
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PASSENGER
           MISCELLANEOUS ACTS,CONDITIONS - SEAT BELT NOT FASTENED
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEAT BELT SIGN ON
           PERSONNEL - DISPATCHING (AIR CARRIER ONLY): FAILURE TO KEEP FLIGHT PROPERLY ADVISED
        WEATHER BRIEFING - COMPANY DISPATCH
        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
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          NONE                                                     VFR
        TYPE OF FLIGHT PLAN
          IFR
        REMARKS- SIGMET ISSUED AFTER ACFT DEPD 1ST ARPT,NOT PASSED TO AIRCREW AT ENROUTE STOP.TURBC NR MT MCKINLEY.
```

## Aircraft

- Registration: N4907 (not matched to a registry record)
- Reported make and model: BOEING 737
- Category: Airplane
- Engines: turbo fan
- Damage: Minor 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.

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