ASN logo
ASN Wikibase Occurrence # 145324
Last updated: 13 October 2021
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Type:Silhouette image of generic C56X model; specific model in this crash may look slightly different
Cessna 560XL Citation XLS
Owner/operator:Pape Group Inc
Registration: N101PG
MSN: 560-5590
Fatalities:Fatalities: 0 / Occupants: 3
Aircraft damage: Substantial
Location:Mahlon Sweet Field - KEUG, Eugene, Oregon -   United States of America
Phase: Landing
Departure airport:Denver, CO (APA)
Destination airport:Eugene, OR (EUG)
Investigating agency: NTSB
The pilot-in-command (PIC) reported that, during the visual approach to the airport, he and the second-in-command (SIC) lowered the landing gear and verified that all cockpit indications showed that the landing gear were in the down-and-locked position. The airplane touched down smoothly on the main landing gear (MLG) and then touched down on the nose landing gear (NLG). The PIC had his hand on the thrust reversers when he and the SIC heard the landing gear unsafe horn; the left MLG then collapsed followed immediately by the collapse of the right MLG and the NLG. The airplane slid on its belly for about 1,500 ft before it came to rest on the runway. Cockpit voice recorder data confirmed that the unsafe landing gear configuration warning did not occur before touchdown as reported by the PIC.

Postaccident examination revealed that, although the landing gear handle was in the down-and-locked position, all of the landing gear were fully retracted and engaged in their respective uplocks. Extensive testing of the airplane's hydraulic and electrical systems did not reveal any malfunctions that would have resulted in an uncommanded gear retraction. Some small, fine particulate matter was observed within the hydraulic manifold assembly; however, testing was unable to determine if these particles contributed to the uncommanded landing gear retraction.
Probable Cause: An uncommanded landing gear retraction after touchdown for reasons that could not be determined because postaccident examination did not reveal any mechanical malfunctions or failures that would have precluded normal operation.


[LINK NOT WORKING ANYMORE:] (photo, credit: sabian404)

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 3 years and 2 months
Download report: Final report

Revision history:

28-Apr-2012 10:17 FelixCatt Added
28-Apr-2012 12:42 RobertMB Updated [Time, Aircraft type, Operator, Location, Source, Damage, Narrative]
25-May-2012 20:34 Geno Updated [Time, Source, Narrative]
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
27-Nov-2017 20:35 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative]

Corrections or additions? ... Edit this accident description