Bombardier CL600-2B16 Challenger 604, VP-BJM
Report name:
Bombardier CL600-2B16 Challenger 604, VP-BJM
Bombardier CL600-2B16 Challenger 604, VP-BJM
Registration:
VP-BJM
VP-BJM
Type:
Bombardier CL600-2B16 Challenger 604
Bombardier CL600-2B16 Challenger 604
Location:
8 nm west of Midhurst VOR
8 nm west of Midhurst VOR
Date of occurrence:
11 November 2005
11 November 2005
Category:
Public transport - Fixed Wing
Public transport - Fixed Wing
Summary:
At FL400 the crew experienced cautions and malfunctions concerning the stabiliser trim system. Nose-up trim commands resulted in almost full nose-down trim and the crew diverted to London Heathrow for a successful flapless landing. Later examination showed contamination within the Horizontal Stabiliser Trim Control Unit (HSTCU) where the two channels of trim command are physically close, with no mechanical back-up. There appear to have been previous occurrences with a different HSTCU on this aircraft. An AAIB Safety Recommendation is made to Transport Canada relating to the effect of the contamination on the pitch trim system.
At FL400 the crew experienced cautions and malfunctions concerning the stabiliser trim system. Nose-up trim commands resulted in almost full nose-down trim and the crew diverted to London Heathrow for a successful flapless landing. Later examination showed contamination within the Horizontal Stabiliser Trim Control Unit (HSTCU) where the two channels of trim command are physically close, with no mechanical back-up. There appear to have been previous occurrences with a different HSTCU on this aircraft. An AAIB Safety Recommendation is made to Transport Canada relating to the effect of the contamination on the pitch trim system.
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