# Incident 20090309002649I: Cndair CL6002D24, Armstrong, IL, March 9, 2009

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: March 9, 2009, 14:50 local time
- Place: Armstrong, IL
- Damage: No damage
- Phase of flight: Cruise/Level Flight
- Operating rules: Air carrier (Part 121)
- Operator: SWIA
- Location: 40.3064° N, 87.8778° W: Placed by OpenAirDocs: center of Armstrong, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.3064&lon=-87.8778&mi=10
- Aircraft: N810SK, registered now (https://openairdocs.org/aircraft/N810SK) (OpenAirDocs)
- Registry model: Bombardier CL-600-2D24 (registry code 1390016, https://openairdocs.org/model/bombardier-cl-600-2d24) (OpenAirDocs)
- Registry engine: GE CF34-8C5 (registry code 30050, https://openairdocs.org/engine/ge-cf34-8c5) (OpenAirDocs)
- Reported make and model: CNDAIR CL6002D24
- Reported engine: GE CF348C5
- People aboard: 80
- Fatal injuries: 0
- Other injuries: 0
- Pilot flight hours: 10,432 total, 7,653 in this make and model, 211 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20090309002649I

## Narrative

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

(-23) SKW 98B WAS FILED FOR FL 390.  THE CAPABILITY FOR THE AIRCRAFT TO CRUISE AT FL 390 WAS PREDICATED ON A PLANNED TAKEOFF WEIGHT OF 71,142.  ACTUAL TAKEOFF WEIGHT WAS 75,329.  SHORTLY AFTER LEVELING OFF AT FL 390, THE AIRCRAFT WOULD NOT MAINTAIN SAFE SPEED.  THE CREW REQUESTED FL 370 BUT WAS DENIED BECAUSE OF CONFLICTING TRAFFIC AT FL380.  THE CREW REQUESTED LOWER TWO MORE TIMES, BUT FAILED TO ADVISE ATC OF THE NATURE AND GRAVITY OF THEIR SITUATION.  ATC ATTEMPTED TO ELLICIT INFORMATION FROM THE CREW ON TWO SEPARATE OCCASSIONS.  AFTER THE THIRD REQUEST FOR LOWER WAS DENIED, THE CREW INITIATED A DESCENT TO FL 370 AND DECLARED AN EMERGENCY.  THIS INCIDENT WAS CAUSED BY THE CREW'S FAILURE TO DETERMINE THAT BECAUSE OF THE INCREASED WEIGHT, THE AIRCRAFT WOULD BE INCAPABLE OF CRUISING AT FL 390.  THE CRITICALITY OF THE INCIDENT WAS EXACERBATED BY THE CREW'S RELUCTANCE TO INFORM ATC OF THE NATURE AND GRAVITY OF THEIR SITUATION.  NOTE: AN ASAP REPORT WAS FILED BY THE CREW AND ACCEPTED BY THE SKYWEST AIRLINES ASAP EVENT REVIEW COMMITTEE.

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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