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20090309002649I

Incident · No damage
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FAA incident report · Cndair CL-600-2D24 · Armstrong, IL · March 9, 2009

FAA Aviation Safety Information Portal

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Date
March 9, 2009 · 14:50 local
Place
Armstrong, IL
Phase of flight
Cruise/Level Flight
Operating rules
Air carrier (Part 121)
Operator
SWIA
Damage
No damage
Aircraft
N810SK
Reported as
Cndair CL6002D24
Reported engine
GE CF348C5
People aboard
80
Fatal injuries
0
Other injuries
0
Pilot’s flight hours
10,432 total7,653 in this make and model211 in the last 90 days
N810SKRegistered now · Bombardier CL-600-2D24S/N 15093Airframe modelBombardier CL-600-2D24Engine modelGE CF34-8C5Turbo-fan

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry 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.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-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.

As the FAA filed it

(-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.