ASN Wikibase Occurrence # 310036
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| Date: | Thursday 7 February 2013 |
| Time: | 10:40 LT |
| Type: |  Bombardier CRJ-200ER |
| Owner/operator: | PSA Airlines, opf US Airways Express |
| Registration: | N261PS |
| MSN: | 7959 |
| Year of manufacture: | 2004 |
| Total airframe hrs: | 21292 hours |
| Engine model: | GE CF34 SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 40 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Bowman, Georgia -
 United States of America
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Charlotte-Douglas Airport, NC (CLT/KCLT) |
| Destin-Fort Walton Beach Airport, FL (VPS/KVPS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight had a normal takeoff and initial climb and then the was cleared by ATC to climb to flight level (FL) 340. The captain set an unsustainable vertical speed command in the autopilot during climb and intentionally allowed the airspeed to decrease well below the recommended climb speed. He did not check the minimum buffet boundary speed applicable to the flight and was not aware of company guidance cautioning against allowing the speed to decay during climbs to high altitude. He failed to monitor airspeed during level off at FL 340 and allowed it to fall to stick shaker speed.
According to the performance study, after the stick shaker activated the crew moved the column forward but then pulled back again while the shaker was still active. The shaker stopped for about one second as the crew continued to pull back. The stick shaker reactivated followed about one second later by the stick pusher, which pitched the aircraft down. The crew then pulled back increasing the angle of attack (AOA) and reactivating the shaker and pusher, which began a cycle of stick pusher dynamics. The airplane performance study shows the crew applied back pressure, or "pulls," seven times in response to sick pusher activation before relaxing back pressure and allowing the airplane to descend. The captain's actions were contrary to the manufacturer's and company's stall recovery procedures, and the airplane regained stable flight only after AOA was reduced by allowing the airplane to descend.
Probable Cause: the captain's inappropriate climb speed, his failure to monitor airspeed during the level off, and his inappropriate response to multiple stall warnings.
Accident investigation:
 |
|
Sources:
NTSB DCA13IA058
History of this aircraft
Other occurrences involving this aircraft
| 13 September 2017 | N261PS | PSA Airlines | 0 | Charlotte-Douglas International Airport, NC (CLT) | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Apr-2023 17:53 | ASN Update Bot | Added |
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