Date & Time: May 23, 1998 at 0330 LT
Type of aircraft:
Learjet 24
Registration:
N100DL
Flight Type:
Ambulance
Survivors:
Yes
Schedule:
Miami - Orlando
MSN:
24-201
YOM:
1969
Crew on board:
2
Crew fatalities:
0
Pax on board:
4
Pax fatalities:
0
Other fatalities:
0
Total fatalities:
0
Captain / Total flying hours:
18395
Captain / Total hours on type:
318
Aircraft flight hours:
8138
Circumstances:
During landing roll, the airplanes normal braking system failed as a result of hydraulic fluid leak(s). At the pilot's request, deployment of the drag chute and application of the emergency braking system was performed by the first officer. According to the first officer, application of the emergency brakes caused the airplane to yaw. The first officer then pulled up on the emergency brakes handle followed by re-application of braking pressure. This action took place several times during the landing roll. Gates' Learjet Flight Training Manual (Page 105) states, 'In using the emergency brake lever, slow steady downward pressure is required. Each time the lever is allowed to return upward to the normal position, nitrogen is evacuated overboard. Brace your hand so you will not allow the lever to move up and down inadvertently on a bumpy runway.' The airplane overran the end of the runway and collided with the Instrument Landing System back course antennae.
Probable cause:
The first officer's failure to perform proper emergency braking procedures.
Final Report:
N100DL.pdf93.59 KB