# NTSB IAD76FIG14: Grumman G-164A, N9828, Downsville, MD, April 24, 1976

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 24, 1976
- Place: Downsville, MD · DOWNSVILLE, MD
- Location: 39.5548° N, 77.8016° W: Placed by OpenAirDocs: center of Downsville, MD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.5548&lon=-77.8016&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 16, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 153301
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD76FIG14
- Page: https://openairdocs.org/ntsb/IAD76FIG14

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0992  76/4/24    DOWNSVILLE,MD       GRUMMAN G-164A      CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1715                    N9828               PX-  0  0  0  AERIAL APPLICATION        AGE 33, 4975 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            71 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DOWNSVILLE,MD               FREDERICK,MD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               IN FLIGHT: PULLUP FROM SWATH RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED CLEARANCE
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
           MISCELLANEOUS ACTS,CONDITIONS - JETTISONED LOAD
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 5500                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - OTHER                                     TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -NOT FASTENED                         GLOVES - USED
          GOGGLES - USED                                           CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -ROLLING
          ELEVATION-AREA BEING TREATED-FEET -  475                 SWATH RUN-HOW FLOWN - UPWIND
        REMARKS- PULLED UP TO AVOID TREES GROWING IN A ROCK BREAK HIT WIRES.FLEW UNDER WIRES ON PRECEDING RUNS.
```

## Aircraft

- Registration: [N9828](https://openairdocs.org/deregistered/N9828-2012-08-22), registration cancelled 2012-08-22, S/N 1288, built 1974 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## 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 19760424010029A](https://openairdocs.org/incident/19760424010029A), Apr 24, 1976: Gulstm G164C, Downsville, MD, Substantial damage. Pulled up to avoid trees growing in a rock break hit wires. Flew under wires on preceding runs.

## Other investigations on N9828 (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 CHI07LA221](https://openairdocs.org/ntsb/CHI07LA221), Jul 22, 2007: Grumman G-164A (N9828), Moline, IL, destroyed. Probable cause: Fatigue failure of the engine cylinder during cruise flight resulting in a loss of engine power. Additional causes were the pilot's failure to maintain sufficient airspeed and the resulting…
- [NTSB FTW92LA085](https://openairdocs.org/ntsb/FTW92LA085), Mar 9, 1992: Grumman G-164A (N9828), Valley Mills, TX, substantial damage. Probable cause: POWER LOSS DUE INADEQUATE MAINTENANCE AND THE RESULTANT MULTIPLE MAINTENANCE DISCREPANCIES. A FACTOR WAS THE WET TERRAIN.

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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