# NTSB UNK64X4191: Aero Comm 680, N6820S, Montague, CA, September 28, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 28, 1964
- Place: Montague, CA · MONTAGUE, CA
- Location: 41.7271° N, 122.5305° W: Placed by OpenAirDocs: center of Montague, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.7271&lon=-122.5305&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report November 16, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 181330
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X4191
- Page: https://openairdocs.org/ntsb/UNK64X4191

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3061  64/9/28    MONTAGUE CALIF      AERO COMM 680       CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 58, 2500
        TIME - 1015                    N6820S              PX-  0  0  1  BUSINESS                  TOTAL HOURS, 240 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - SISKIYOU COUNTY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR RETRACTED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           SYSTEMS - HYDRAULIC SYSTEM: RESERVOIR,LINES,FITTINGS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        REMARKS- HYDRAULIC LINE TO SYSTEM RELIEF VALVE PN 67900-31-883 FAILED.
```

## Aircraft

- Registration: [N6820S](https://openairdocs.org/deregistered/N6820S-1971-02-02), registration cancelled 1971-02-02, S/N 680-326-20 (OpenAirDocs)
- Reported make and model: AERO COMM 680
- Registry model: [Aero Commander 680](https://openairdocs.org/model/aero-commander-680) (registry code 0141602) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Siskiyou County

## Other investigations on N6820S (1)

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 OAK66A0035](https://openairdocs.org/ntsb/OAK66A0035), Feb 25, 1966: Aero Comor 680 (N6820S), Red Bluff, CA, destroyed, 2 fatal

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.