Boeing 747-251F incident near Minneapolis, Minnesota, January 9, 1988
On January 9, 1988 at about 12:15 pm local time, a Boeing 747-251F, registered N618US, was involved in an incident near Minneapolis, Minnesota. It was a flight of an unrecorded kind under scheduled airline rules (Part 121). No one was hurt; 3 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this incident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- January 9, 1988 · about 12:15 pm local time
- Place
- Minneapolis, Minnesota · map
- Type
- Incident
- Injuries
- No one was hurt; 3 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Boeing 747-251F · all 747-251Fs on the register
- Registration
- N618US · registry record · serial 21122
- Damage
- Not recorded
- Flight
- Flight of an unrecorded kind · scheduled airline rules (Part 121)
The NTSB's narrative final · quoted from the NTSB record
AIRCRAFT EXPERIENCED A LOSS OF AILERON CTL WHEN ICE FORMED AROUND AILERON CONTROL CABLES AND RESTRICTED THEIR MOVEMENT. WATER DRAINING THROUGH OPEN PLENUM DRAINS IN THE MAIN LANDING GEAR WHEEL WELL FROZE WHEN EXPOSED TO BELOW FREEZING TEMPERATURES AT 35,000 FT. THE FLIGHT CREW WAS ABLE TO REGAIN LIMITED CONTROL BY USING VERY HEAVY CONTROL INPUTS. THE ACFT WAS LANDED UNEVENTFULLY AFTER DIVERTING TO THE NEAREST SUITABLE AIRPORT. MAINTENANCE PERSONNEL REPORTED THAT THE DRAINS WERE INADVERTENTLY LEFT OPEN.
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: airline transport pilot
- Ratings: multi-engine land; single-engine land; instrument: airplane
- Flight time: 19,190 hours in all; 1,320 in this make and model
- Medical certificate: Class 1
- Seat: left
The aircraft
- Last inspection: continuous airworthiness programme
- Maximum gross weight: 775,000 lb
- Landing gear: retractable
- Engine: P&W JT-9 (turbofan); 0 hours total
- Operator: Northwest Airlines
The flight
- Departed from: JFK New York NY
- Destination: SEA Seattle WA
- Flight plan: IFR
- Runway 0
- A second pilot was aboard
Weather at the time
- Light: dawn
- Sky: not recorded; not recorded
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
- Altimeter: 29.00 inHg
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 3 |
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.