Enstrom F28A accident near Saipan Island, Cq, January 12, 1997
On January 12, 1997 at about 3:58 pm local time, a Enstrom F28A (helicopter), registered N9087, was destroyed in an accident near Saipan Island. It was a flight of an unrecorded kind under general aviation rules (Part 91). 2 people were killed and 1 person was seriously injured. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
loss of engine power due to fuel exhaustion, resulting from improper planning/decision; and the pilot's abrupt handling of the flight controls, while maneuvering to avoid swimmers, which resulted in main rotor blade contact with the tail boom. A related factor was: the presence of swimmers in the emergency landing area, which likely motivated the pilot to alter his approach for a forced/autorotative landing.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- January 12, 1997 · about 3:58 pm local time
- Place
- Saipan Island, CQ
- Type
- Accident
- Injuries
- 2 people were killed and 1 person was seriously injured.
- Weather
- visual conditions (good weather)
- Aircraft
- Enstrom F28A · all F28As on the register
- Registration
- N9087 · no longer on the register · serial 211
- Damage
- Destroyed
- Flight
- Flight of an unrecorded kind · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
Shortly before 1510, the pilot started the helicopter's engine, then departed on a sightseeing tour flight around the island with two fare-paying passengers. The operator anticipated the flight would last between 0.5 and 0.7 hrs. For weight considerations, the fuel load had been reduced before takeoff by an estimated 10 gallons bringing the usable quantity to between 16 and 19 gallons, as estimated using a dipstick. About 1558, while cruising off shore & nearly parallel to the shoreline, witnesses observed the helicopter fly past while making sounds like its engine was sputtering, stalling, or cutting in and out. The helicopter's course remained unchanged, & seconds later, other witnesses heard a loud bang sound. The helicopter then entered a rapid descent, & impacted in about 2.5-foot-deep ocean water in front of a hotel where people were swimming. An exam of the wreckage revealed a main rotor blade had impacted & severed the tail rotor drive shaft. No evidence was found indicating the pilot had practiced autorotations in the Enstrom helicopter during the 4.5 months since becoming rotorcraft rated. During the structural airframe and engine examinations, no evidence was found of precipitating mechanical malfunctions. Calculations based on maximum anticipated fuel consumption rates, and approximations for the quantity of fuel on board, revealed fuel exhaustion could occur within 0.1 hour of the flight's duration.
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: multi-engine land; single-engine land; single-engine sea; instrument: airplane; rotorcraft: helicopter
- Flight time: 1,974 hours in all; 54 in this make and model; 160 in the last 90 days; 74 in the last 30 days; 1,670 as pilot in command
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 2,267 hours
- Last inspection: annual inspection, July 18, 1996; 66 hours since
- Maximum gross weight: 2,150 lb
- Seats: 3
- Landing gear: fixed
- Engine: Lycoming HIO-360-C1A (piston); 0 hours total
The flight
- Departed from: PGSN Koblerville OF
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 090° at 10 knots
- Visibility: 7 statute miles
- Sky: broken clouds at 12,000 ft; scat at 1,400 ft
- Temperature: 81°F (27°C), dew point 75°F (24°C)
- Altimeter: 29.00 inHg
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 1 | 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.
Other NTSB records under N9087 the same tail number, which may have belonged to a different aircraft at the time
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.