Grumman G-164A accident near Pingree, Idaho, July 20, 1997
On July 20, 1997 at about 3:00 pm local time, a Grumman G-164A, registered N6550, was destroyed in an accident near Pingree, Idaho. It was an aerial application (crop spraying) flight under agricultural flying rules (Part 137). 1 person was killed. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot-in-command's failure to maintain adequate clearance with the power lines. A contributing factor was the unmarked power lines.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 20, 1997 · about 3:00 pm local time
- Place
- Pingree, Idaho · map
- Type
- Accident
- Injuries
- 1 person was killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Grumman G-164A · all G-164As on the register
- Registration
- N6550 · no longer on the register · serial 693
- Damage
- Destroyed
- Flight
- Aerial application (crop spraying) flight · agricultural flying rules (Part 137)
The NTSB's narrative final · quoted from the NTSB record
The pilot-in-command impacted power lines during a pull-up maneuver, severing two of the three 161,000 volt unmarked power lines. The aircraft then descended out of control, impacting terrain in a nose low, upright attitude, and came to rest on the east side of the power lines.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
Pilot
- Certificate: commercial pilot
- Ratings: single-engine land
- Flight time: 4,420 hours in all
- Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
- Seat: frt
The aircraft
- Last inspection: inspection type not recorded
- Maximum gross weight: 3,725 lb
- Seats: 1
- Landing gear: fixed
- Engine: P&W R-1340 (piston); 0 hours total
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 240° at 8 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 66°F (19°C), dew point 48°F (9°C)
- Altimeter: 30.00 inHg
- Observation at 2:45 pm from PIH, 11 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.