# NTSB OAK77DVD48: Hughes 269C, N9638F, Oakland, CA, July 21, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 21, 1977
- Place: Oakland, CA · OAKLAND, CA
- Location: 37.8044° N, 122.2708° W: Placed by OpenAirDocs: center of Oakland, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.8044&lon=-122.2708&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 21, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 146152
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK77DVD48
- Page: https://openairdocs.org/ntsb/OAK77DVD48

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1863  77/7/21    OAKLAND,CA          HUGHES 269C         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1030                    N9638F              PX-  0  0  0  DUAL                      AGE 33, 3400 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1740 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - OAKLAND INTRNATL
        DEPARTURE POINT             INTENDED DESTINATION
          OAKLAND,CA                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - IMPROPER LEVEL OFF
```

## Aircraft

- Registration: [N9638F](https://openairdocs.org/deregistered/N9638F-1991-03-14), registration cancelled 1991-03-14, S/N 1000056 (OpenAirDocs)
- Reported make and model: HUGHES 269C
- Registry model: [Hughes 269C](https://openairdocs.org/model/hughes-269c) (registry code 4470504) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Oakland Intrnatl

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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