Boeing B-737-222 incident near Portland, Oregon, July 9, 1984
On July 9, 1984 at about 9:15 pm local time, a Boeing B-737-222, registered N9015U, was involved in an incident near Portland, Oregon. It was a flight of an unrecorded kind under scheduled airline rules (Part 121). No one was hurt; 71 people were on board or involved. The weather was visual conditions (good weather).
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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 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 9, 1984 · about 9:15 pm local time
- Place
- Portland, Oregon · map
- Type
- Incident
- Injuries
- No one was hurt; 71 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Boeing B-737-222 B737-222
- Registration
- N9015U · registry record · serial 19053
- Damage
- Not recorded
- Flight
- Flight of an unrecorded kind · scheduled airline rules (Part 121)
The NTSB's narrative final · quoted from the NTSB record
AFTER TAKEOFF, THE ACFT WAS CLIMBING THRU ABOUT 4000 FT WHEN THE APU FIRE WARNING LIGHT ILLUMINATED. THE FLT CREW DISCHARGED THE FIRE EXTINGUISHING UNITS & REQUESTED AN EMERGENCY LANDING. A TEARDOWN OF THE APU REVEALED EVIDENCE THAT A HARD OBJECT WAS INJESTED INTO THE 1ST STAGE COMPRESSOR IMPELLER, BENDING 2 OF THE BLADES. THE OBJECT CONTINUED THRU THE ENG & IMPACTED THE EXDUCER BLADE. THE BLADE FAILED AT A CRACK & PENETRATED THE EXHAUST PIPE ASSEMBLY. HOT GASES THEN VENTED INTO THE COOLING AIR PASSAGE & OVERHEATED THE TAIL CONE & AFT PORTION OF THE APU.
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; instrument: airplane
- Flight time: 18,000 hours in all
- Medical certificate: Class 1 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Last inspection: inspection type not recorded
- Maximum gross weight: 125,000 lb
- Seats: 115
- Landing gear: retractable
- Engine: P&W JT8D-17 (turbojet); 0 hours total
The flight
- Departed from: PDX Portland OR at 9:00 pm
- Destination: SAN San Diego CA
- Flight plan: IFR
- Runway 0
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 310° at 5 knots
- Visibility: 25 statute miles
- Sky: clear
- Temperature: 70°F (21°C), dew point 54°F (12°C)
- Altimeter: 30.00 inHg
- Observation at 8:50 pm from PDX, 10 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 5 | |||
| Passengers | 66 |
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 N9015U the same tail number, which may have belonged to a different aircraft at the time
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The documents and photographs are the NTSB's docket, the folder of records gathered during the investigation, shown as the NTSB released them (the NTSB redacts some personal details first) and listed under the NTSB's own titles. This site's own text never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number SEA84IA168.