# Incident 19990227017829I: Boeing 747251B, Seattle, WA, February 27, 1999

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: February 27, 1999, 13:31 local time
- Place: Seattle, WA
- Airport: Seattle-Tacoma International
- Damage: Minor damage
- Phase of flight: To Init Climb(1st Pwr Reduct)
- Operating rules: Air carrier (Part 121)
- Operator: NWAA
- Location: 47.4499° N, 122.3118° W: Placed by OpenAirDocs at SEATTLE-TACOMA INTL (SEA), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.4499&lon=-122.3118&mi=10
- Aircraft: N612US, a cancelled registration (https://openairdocs.org/deregistered/N612US-2013-08-20) (OpenAirDocs)
- Registry model: Boeing 747-251B (registry code 1384892, https://openairdocs.org/model/boeing-747-251b) (OpenAirDocs)
- Registry engine: Pratt & Whitney JT9D-3A (registry code 52050, https://openairdocs.org/engine/pratt-whitney-jt9d-3a) (OpenAirDocs)
- Reported make and model: BOEING 747251B
- Reported engine: PWA JT9D7J
- People aboard: 2
- Fatal injuries: 0
- Pilot flight hours: 20,132 total, 4,932 in this make and model, 151 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19990227017829I

## Narrative

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

(-5) NUMBER FOUR ENGINE WAS CHANGED AT NARITA, JAPAN ON FEBRUARY 27, 1999. THE LAST KNOWN OPENING AND CLOSING OF #4 ENGINE COWLING WAS ACCOMPLISHED AFTER THIS ENGINE CHANGE. THE AIRCRAFT MADE ONE FLIGHT FROM NARITA, JAPAN TO SEATTLE, WA WITHOUT INCIDENT. GROUND CREW REPORTED NO DEFICIENCIES DURING THE LINE CHECK INSPECTION OF THE #4 ENGINE COWL DOOR LATCHES AT SEATTLE. ON TAKEOFF, AT SEATTLE, THE OUTBOARD COWL DOOR CAME OFF AND THE INBOARD COWL DOOR COLLAPSED IN PLACE AROUND THE ENGINE. DAMAGE TO LOWER COWL DOOR LATCHES FORWARD TO AFT, #1, #2, #5 & #6, SHOW NO CATASTROPHIC DAMAGE TO LATCH ATTACH STRUCTURE, HOOK OR "U" CATCH. ON LATCHES #3 & #4, THE SECURING LATCH ATTACH STRUCTURE WAS TORN FROM THE COWLING STRUCTURE. UPPER FORWARD TRACK ARM, OF OUTBOARD COWL DOOR, FRACTURED IN THE ARM TRACK. NOTE: AIRFRAME HOURS AND CYCLES WERE AS OF 24 MAR 99.

## Other reports on N612US (5)

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

- [Incident 20001031030959I](https://openairdocs.org/incident/20001031030959I), Oct 31, 2000: Boeing 747251B (N612US), Tokyo, JA. (-23) On climb thru 12,000 feet MSL intermitten cabin warning horn sounded.a/c continued climb at 14,000 feet MSL oxygen lite illuminated and masks dropped.…
- [Incident 19870622036329I](https://openairdocs.org/incident/19870622036329I), Jun 22, 1987: Boeing 747251B (N612US), Honolulu, HI. Aircraft lost all ins guidance system over ocean. Safe landing. Replaced ins nav unit.
- [Incident 19821222067169I](https://openairdocs.org/incident/19821222067169I), Dec 22, 1982: Boeing 747* (N612US), Los Angeles, CA, Minor damage. #4 Engine caught on fire. Fire extinguished. Found #3 bearing breather manifold broken.
- [Incident 19790605014329I](https://openairdocs.org/incident/19790605014329I), Jun 5, 1979: Boeing 747* (N612US), Comox, CN, Minor damage. Engine fire in flight due to gear box failure. Fire bottle failed due to hose disconnected.
- [Incident 19780323010099I](https://openairdocs.org/incident/19780323010099I), Mar 23, 1978: Boeing 747/ (N612US), Tokyo, JA, Minor damage. Lightning strike during descent damaged compass flux valve, antena coupler, and main transfer valve actuator.

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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