# Incident 19970126017519I: Boeing 747251B, Tokyo, JA, January 26, 1997

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: January 26, 1997, 06:00 local time
- Place: Tokyo, JA
- Airport: New Tokyo International-Narita
- Damage: Substantial damage
- Phase of flight: Takeoff Ground Roll
- Operating rules: Air carrier (Part 121)
- Operator: NWAA
- Aircraft: N627US, a cancelled registration (https://openairdocs.org/deregistered/N627US-2008-07-16) (OpenAirDocs)
- Registry model: Boeing 747-251B (registry code 1384892, https://openairdocs.org/model/boeing-747-251b) (OpenAirDocs)
- Registry engine: Amateur-built UNKNOWN ENG (registry code 99999, https://openairdocs.org/engine/amateur-built-unknown-eng) (OpenAirDocs)
- Reported make and model: BOEING 747251B
- Reported engine: PWA JT9D7Q
- People aboard: 3
- Fatal injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19970126017519I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

NARRATIVE: ON JANUARY 26, 1997 NORTHWEST FLIGHT 20, A BOEING 747-251B, REGISTRATION #N627US, EXPERIENCED A NUMBER ONE ENGINE FAILURE 20 TO 30 SECONDS INTO THE TAKEOFF ROLL. THE CREW ABORTED TAKEOFF, EXPERIENCED NO FIRE WARNING OR OTHER EMERGENCY INDICATIONS , TAXIED BACK TO THE GATE AND DEPLANED PASSENGERS. MAINTENANCE FOUND THE NUMBER ONE ENGINE, A PRATT & WHITNEY JT9D-7Q, S/N 702058, WITH A RUPTURED DIFFUSER CASE. THE RUPTURED DIFFUSER CAUSED BOTH COWL DOORS TO BE BLOWN OFF, ALL THE PYLON BLOW OUT PANELS OUT AND SEVERAL ENGINE COMPONENTS TO BE LIBERATED FROM THE ENGINE. THE ENGINE WAS REMOVED AND BROUGHT TO THE NWA ENGINE SHOP IN MINNEAPOLIS. THE ENGINE WAS DISASSEMBLED UNDER THE DIRECTION OF THE NTSB. THE DIFFUSER WAS SECTIONED WITH HALF GOING TO THE NTSB AND HALF GOING TO PRATT & WHITNEY FOR EXAMINATION. THE NTSB REPORT SHOULD BE AVAILABLE WITHIN 6 MONTHS.

## Other reports on N627US (3)

Matched to the same aircraft by N-number and date.

- [Accident 20050819020349A](https://openairdocs.org/incident/20050819020349A), Aug 19, 2005: Boeing 747251B (N627US), Agana, Guam, Substantial damage. (-23) About 2 miles out on a visual approach to pgum, pilot reported a problem, initiated a go-around and requested to circle off shore. Thereafter, he…
- [Incident 19810128010079I](https://openairdocs.org/incident/19810128010079I), Jan 28, 1981: Boeing 747251B (N627US), Anchorage, MN. Unscheduled landing due to oil leak from fuel oil cooler.
- [Incident 19800412037999I](https://openairdocs.org/incident/19800412037999I), Apr 12, 1980: Boeing 747/ (N627US), Chicago, IL. Aborted takeoff due to takeoff warning horn.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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