# NTSB DEN70F0108: Hughes 269B, N9484F, Cheyenne, WY, September 29, 1969

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: September 29, 1969
- Place: Cheyenne, WY · CHEYENNE, WY
- Location: 41.1400° N, 104.8202° W: Placed by OpenAirDocs: center of Cheyenne, WY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.1400&lon=-104.8202&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report February 25, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 187057
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN70F0108
- Page: https://openairdocs.org/ntsb/DEN70F0108

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3129  69/9/29    CHEYENNE,WYO        HUGHES 269B         CR-  0  0  1  COMMERCIAL                ATP,FLIGHT INSTR., AGE
        TIME - 0837                    N9484F              PX-  0  0  1  AIR TAXI-PASSG            26, 520 TOTAL HOURS, 70
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - CHEYENNE
        DEPARTURE POINT             INTENDED DESTINATION
          CHEYENNE,WYO                CHEYENNE,WYO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               LANDING: GO-AROUND
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PILOT IN COMMAND - SELECTED UNSUITABLE TERRAIN
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
           TERRAIN - HIGH OBSTRUCTIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      70
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
           10                                                       5
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- ATMTD LDG IN SMALL PARKING LOT SURROUNDED BY WIRES,BLDGS. HIT 2 AUTOS. DENSITY ALT 7800 FT.
```

## Aircraft

- Registration: [N9484F](https://openairdocs.org/deregistered/N9484F-2025-08-21), registration cancelled 2025-08-21, S/N 1160291 (OpenAirDocs)
- Reported make and model: HUGHES 269B
- Registry model: [Hughes 269B](https://openairdocs.org/model/hughes-269b) (registry code 4470502) (OpenAirDocs)
- Registry engine: [Lycoming IO-360 series](https://openairdocs.org/engine/lycoming-io-360-series) (registry code 41881, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Cheyenne

## Other investigations on N9484F (2)

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.

- [NTSB WPR13CA337](https://openairdocs.org/ntsb/WPR13CA337), Jul 23, 2013: Hughes 269B (N9484F), Lewiston, ID, substantial damage. Probable cause: The pilot's incorrect application of the cyclic control during the landing.
- [NTSB FTW83LA211](https://openairdocs.org/ntsb/FTW83LA211), Apr 29, 1983: Hughes 269B (N9484F), Forgan, OK, 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.

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