# NTSB FTW78DA063: Grum Amer AA1C, N9660U, Beaumont, TX, July 25, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 25, 1978
- Place: Beaumont, TX · BEAUMONT, TX
- Location: 30.0860° N, 94.1018° W: Placed by OpenAirDocs: center of Beaumont, TX, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=30.0860&lon=-94.1018&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 27, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 140363
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW78DA063
- Page: https://openairdocs.org/ntsb/FTW78DA063

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3373  78/7/25  NR.BEAUMONT,TX        GRUM AMER AA1C      CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1456                    N9660U              PX-  0  0  0  DUAL                      AGE 30, 1462 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            22 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - JEFFERSON COUNTY
        DEPARTURE POINT             INTENDED DESTINATION
         BEAUMONT,TX                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - EXCEEDED DESIGNED STRESS LIMITS OF AIRCRAFT
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE INSPECTION OF AIRCRAFT (MAINTENANCE PERSONNEL)
        FACTOR(S)
           AIRFRAME - FLIGHT CONTROL SURFACES: RUDDER SURFACES,ATTACHMENTS
           AIRFRAME - FLIGHT CONTROL SURFACES: VERTICAL STABILIZER,ATTACHMENTS
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - PREVIOUS DAMAGE
        REMARKS- DEMO USE OF RUDDER TO LVL WINGS DRG APCH STALLS-PREV DMG TO VERT STAB.
```

## Aircraft

- Registration: [N9660U](https://openairdocs.org/deregistered/N9660U-2009-09-22), registration cancelled 2009-09-22, S/N AA1C0089, built 1977 (OpenAirDocs)
- Reported make and model: GRUM AMER AA1C
- Registry model: [Grumman American Avn. AA-1C](https://openairdocs.org/model/grumman-american-avn-aa-1c) (registry code 3960100) (OpenAirDocs)
- Registry engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Jefferson County

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19780725029199A](https://openairdocs.org/incident/19780725029199A), Jul 25, 1978: Grumav AA1C, Beaumont, TX, Substantial damage. Demo use of rudder to lvl wings drg apch stalls-prev dmg to vert .

## Other investigations on N9660U (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 FTW79FRG34](https://openairdocs.org/ntsb/FTW79FRG34), May 27, 1979: Grum Amer AA1-C (N9660U), Rockport, TX, 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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