Beechjet 400
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 68.7; Flight Crew Total 10000; Flight Crew Type 2500
Confusion; Situational Awareness
Aircraft Equipment Problem Critical
Aircraft Aircraft Damaged; Flight Crew Overcame Equipment Problem; Flight Crew Took Evasive Action; General Maintenance Action
Aircraft
The flight progress was all the way normal until touchdown after being cleared and vectored for RNAV (GPS) approach on Runway 13. Upon touchdown; when trying to deploy the thrust reversers; noticed that for an unknown reason the reverser's levers were still mechanically locked in the stowed position. [I] proceeded to apply normal brakes; but experienced pressure on the pedals; thus no braking action at all. Due to the length of the runway; which is the shortest one (5;000 FT); but good enough for takeoff and landing according to the aircraft's Takeoff/Landing tables; I watched the end of the runway approaching fast in spite of our low speed Vref 104 KTS. Therefore; I decided to apply the emergency brakes and commanded the copilot to do so until the aircraft finally came to a stop at the end of the runway. While the emergency braking was applied by the copilot I kept on trying to deploy the thrust reversers until they deployed at about 70 KTS on the last third of the runway. After securing the aircraft and shutting down engines and systems (no evacuation necessary); passengers and crew were disembarked. Nobody was injured as there was no property damage. The only visual damages observed on the aircraft were the main wheels and both blown tires; which later were confirmed by the Raytheon Hawker maintenance crew who performed the corrective actions on site and released the aircraft back to service. After evaluating the mishap and going over the experienced faults with maintenance personnel; it is suspected that the aircraft remained in flight mode for a brief moment while on the ground and therefore preventing the reversers' deployment. The braking by-passing by the antiskid as it supposed to do in flight. Squat switches were replaced as a precautionary measure.
A BE40's thrust reversers and brakes were not available for activation until below 70 KTS; so the emergency brakes were used which caused tire failures. Squat switch malfunctions were suspected.