# Accident 19970901047979A: Doug DC982, Seattle, WA, September 1, 1997

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: September 1, 1997, 21:10 local time
- Place: Seattle, WA
- Damage: Substantial damage
- Operating rules: Air carrier (Part 121)
- Operator: ASAA
- Location: 47.4397° N, 122.2794° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=47.4397&lon=-122.2794&mi=10
- Aircraft: N951AS, a cancelled registration (https://openairdocs.org/deregistered/N951AS-2009-04-08) (OpenAirDocs)
- Registry model: Mcdonnell Douglas DC-9-82(MD-82) (registry code 3022082, https://openairdocs.org/model/mcdonnell-douglas-dc-9-82-md-82) (OpenAirDocs)
- Registry engine: Pratt & Whitney JT8D-5 (registry code 52046, https://openairdocs.org/engine/pratt-whitney-jt8d-5) (OpenAirDocs)
- Reported make and model: DOUG DC982
- NTSB investigation: [NTSB SEA97FA202](https://openairdocs.org/ntsb/SEA97FA202) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19970901047979A

## Narrative

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

(-16) ON SEPT. 1, 1997, UPON LANDING GEAR EXTENTION FOR LANDING AT SEATTLE AIRPORT, THE CREW OF ALASKA AIRLINES FLIGHT 255 REPORTED AN UNSAFE GEAR INDICATION WARNING LIGHT. A GO AROUND WAS INITIATED AND EMERGENCY CHECKLIST ACCOMPLISHED. AFTER LANDING AT APPROX. 60 KNOTS THE NOSE LANDING GEAR COLLAPSED. AN INVESTIGATION REVEALED A FAILED UPPER LOCK LINK, PART NUMBER 3914464-503. THE ABOVE MENTIONED PART IS SUBJECT TO AIRWORTHINESS DIRECTIVE 97-02-10 REQUIRING A REPETITIVE NON DESTRUCTIVE TEST OF 5000 CYCLE INTERVALS. THE UPPER LOCK LINK INSTALLED ON N951AS HAD BEEN TESTED 1075 CYCLES PRIOR TO FAILURE.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB SEA97FA202](https://openairdocs.org/ntsb/SEA97FA202), Sep 2, 1997: McDonnell Douglas DC-9-82 (MD-82) (N951AS), Seattle, WA, substantial damage. Probable cause: fatigue failure of the nose landing gear upper lock link, due in part to reduced strength after the manufacturing process was changed from forged to machined plate stock; and inadequate…

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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