# Incident 20150518013589I: Boeing 737-990ER, Seatac, WA, May 18, 2015

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: May 18, 2015, 00:07 local time
- Place: Seatac, WA
- Airport: Seattle-Tacoma International
- Damage: Minor damage
- Phase of flight: Landing: Touchdown
- Operating rules: Air carrier (Part 121)
- Operator: ASAA
- 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: N462AS, registered now (https://openairdocs.org/aircraft/N462AS) (OpenAirDocs)
- Registry model: Boeing 737-990ER (registry code 13848CE, https://openairdocs.org/model/boeing-737-990er) (OpenAirDocs)
- Registry engine: CFM International CFM56-7B27E series (registry code 13078, https://openairdocs.org/engine/cfm-international-cfm56-7b27e-series) (OpenAirDocs)
- Reported make and model: BOEING 737-990ER
- Reported engine: CFM INTL CFM56-7B27E
- People aboard: 178
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Airline transport
- Pilot flight hours: 9,941 total, 7,363 in this make and model, 241 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20150518013589I

## Narrative

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

UPON TOUCHDOWN ON RUNWAY 34R IN KSEA, BOTH LEFT MAIN LANDING GEAR TIRES FAILED.  AFTER STOPPING THE AIRCRAFT ON THE RUNWAY, THE FLIGHT CREW REQUESTED EMERGENCY EQUIPMENT.  THERE WAS NO FIRE AND THERE WERE NO INJURIES.  NO EVACUATION WAS INITIATED.

THE LEFT MAIN LANDING GEAR WHEEL ASSEMBLY WAS INSPECTED BY THE MANUFACTURER, HONEYWELL.  THIS INSPECTION REVEALED EVIDENCE OF HEAT DAMAGE, INCLUDING ROTORS WHICH WERE WELDED TO STATORS.  IT APPEARS THAT THE POSITION 1 WHEEL DID NOT ROTATE UPON TOUCHDOWN, LIKELY DUE THE WELDING THAT OCCURRED SOMETIME PRIOR TO TOUCHDOWN. THE NUMBER 2 POSITION TIRE DEFLATED SOMETIME PRIOR TO TOUCHDOWN AND WAS SHREDDED AFTER TOUCHDOWN.  NOTWITHSTANDING THE DAMAGE CREATED BY EXCESSIVE HEAT AND DAMAGE FROM THE LANDING ROLLOUT, THE LEFT MAIN GEAR ASSEMBLY APPEARED TO HAVE NO ABNORMALITIES.

FOLLOWING REPLACEMENT OF THE LEFT MAIN WHEEL ASSEMBLY, THE AIRLINE CONDUCTED FUNCTIONAL TESTS ON THE AIRCRAFT?S BRAKING SYSTEM, INCLUDED HIGH-SPEED TAXI TESTS.  NO ADDITIONAL ANOMALIES WERE DISCOVERED AND THE AIRCRAFT WAS RETURNED TO SERVICE.

THE AIRCRAFT DEPARTED RUNWAY 7R IN KLAS AT 0511Z.  WIND DIRECTION AND SPEED AT THE TIME OF DEPARTURE WAS NOT AVAILABLE.  KLAS METAR AT 0456Z, 15 MINUTES PRIOR TO DEPARTURE INDICATED WINDS FROM 180 AT 13 KNOTS AND A TEMPERATURE OF 23.  THIS WIND DIRECTION AND SPEED WOULD HAVE SUBJECTED THE AIRCRAFT TO A 12 KNOT CROSSWIND AND A 5 KNOT TAILWIND AT DEPARTURE.

THE FAA INTERVIEWED THE FLIGHT CREW.  THE FIRST OFFICER (PILOT FLYING) AND THE CAPTAIN (PILOT MONITORING) EACH PROVIDED WRITTEN STATEMENTS.  NEITHER PILOT?S STATEMENT PROVIDED ADDITIONAL INSIGHT ON WHAT MAY HAVE CAUSED EXCESSIVE HEAT TO THE LEFT MAIN WHEEL ASSEMBLY.  EACH PILOT REPORTED NORMAL OPERATION OF ALL SYSTEMS DURING THE FLIGHT PRIOR TO TOUCHDOWN.

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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