Boeing 747-121 incident near Mb, April 14, 1984
On April 14, 1984 at about 11:50 pm local time, a Boeing 747-121, registered N751PA, suffered minor damage in an incident. It was a flight of an unrecorded kind under scheduled airline rules (Part 121). No one was hurt; 263 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
- April 14, 1984 · about 11:50 pm local time
- Place
- , MB
- Type
- Incident
- Injuries
- No one was hurt; 263 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Boeing 747-121 · all 747-121s on the register
- Registration
- N751PA · no longer on the register · serial 19665
- Damage
- Minor damage
- Flight
- Flight of an unrecorded kind · scheduled airline rules (Part 121)
The NTSB's narrative final · quoted from the NTSB record
WHILE CLIMBING THROUGH FL200 CREW EXPERIENCED A LOSS OF #4 HYDRAULIC SYSTEM PRESSURE, ILLUMINATION OF THE RED 'GEAR DOOR' AND 'LEFT WING DOOR OPEN' LIGHTS, A MEDIUM FREQ VIBRATION AND HEARD A LOUD RUSHING SOUND. FLT DIVERTED TO MIAMI, FL, WHERE LANDING WAS MADE WITHOUT INCIDENT. INVESTIGATION DISCLOSED LEFT WING LANDING GEAR DOOR ACTUATOR, ACTUATOR BEAM ASS'Y AND ASSOC KEEL BEAM BOX ATTACHING HARDWARE WERE MISSING. BOEING SUBSEQUENTLY HAS ISSUED A SERVICE BULLETIN REGARDING DETECTION OF CRACKS IN THE INTERNAL BACK-UP BRACKETS & FITTINGS FOR THE WING GEAR DOOR ACTUATING SYSTEM.
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: 26,000 hours in all
- Medical certificate: Unknown (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 56,042 hours
- Last inspection: approved inspection programme
- Maximum gross weight: 710,000 lb
- Seats: 495
- Landing gear: retractable
- Engine: P&W JT9D (turbofan); 0 hours total
The flight
- Destination: JFK New York NY
- Flight plan: IFR
- Runway 0
- A second pilot was aboard
Weather at the time
- Light: not reported
- Sky: not recorded; not recorded
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 13 | |||
| Passengers | 250 |
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.