Accident Learjet 60 N240FX, Sunday 12 March 2000
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Date:Sunday 12 March 2000
Time:08:40 LT
Type:Silhouette image of generic LJ60 model; specific model in this crash may look slightly different    
Learjet 60
Owner/operator:Bombardier Aerospace Corp
Registration: N240FX
MSN: 167
Year of manufacture:1999
Total airframe hrs:320 hours
Engine model:P&W PW-305A
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:JACKSON, Wyoming -   United States of America
Phase: Unknown
Nature:Executive
Departure airport:PROVO , UT (KPVU)
Destination airport:(KJAC)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Narrative:
The airplane departed Provo, Utah, with its thrust reversers mechanically pinned in forward thrust. The ILS approach to runway 18 (6,299 x 150 feet, contaminated with ice, and -.611% gradient) at Jackson Hole Airport was performed with a 6.5 knot tailwind. During the landing roll, the captain used the emergency braking system, which deactivated the anti-skid protection. At mid-field, the airplane slid left, then slid right, and then left back to the runway centerline where the captain said he continued braking. The airplane continued beyond the end of the runway for 160 feet into snow approximately 2 feet deep. The manufacturer's Airplane Flight Manual indicates that when emergency braking is utilized, the anti-skid protection is deactivated. The CVR recorded a 'high pitch' sound at 0839:44, which was the high-pressure air of the emergency braking system being activated. The Airplane Flight Manual also limits landing on contaminated runways to the following: A. Winds must be zero or a headwind of less than 30 knots (i.e. no tailwind); B. The runway gradient must be between -1% and 2.2%; and C. The anti-skid system must be operational.

Probable Cause: The pilot not following the airplane manufacturer's recommended landing procedures for a contaminated runway by landing with a tailwind. Factors were the pilot's inadvertent deactivation of the anti-skid protection, the ice contaminated runway, and the snow covered terrain beyond the runway.

Accident investigation:
cover
  
Investigating agency: NTSB
Report number: DEN00LA057
Status: Investigation completed
Duration: 11 months
Download report: Final report

Sources:

NTSB DEN00LA057

Revision history:

Date/timeContributorUpdates
16-Oct-2022 04:17 ASN Update Bot Added

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