Incident at ST. THERESA POINT MB (CYST)
2003-01-15: PAG 621, a Metro II, was on final approach at St. Theresa Point when the crew was unable to get a down and locked indication for the left main gear. They did a fly-by over the runway and the gear appeared to be extended normally. The a/c landed safely at 1841Z. The same a/c had the identical problem on Monday at Island Lake (2003C0046). Apparently, in both cases, the problem was a faulty microswitch in the gear downlock system. TSB reported that when the landing gear was selected down, the left gear 'in transit' light remained on. The crew cycled the gear several times and completed an emergency gear extention, without success, and then landed without further incident. The aircraft was ferried to Winnipeg for repair, where it was found that the left downlock microswitch was faulty. The same aircraft was involved in a similar incident the previous day (A02C0008).
2003-01-16: UPDATE Company maintenance reported that on approach to YST, the L/H main landing gear failed to indicate down and locked. The aircraft landed without incident and it was later flown to YWG on a flight permit to the maintenance facility. The aircraft was placed on jacks and the gear tested many times without being able to duplicate the fault. The L/H inboard downlock microswitch was replaced (the outboard switch was previously replaced), the gear tested and the aircraft returned to service. On the previous day, the aircraft had experienced the same problem and the aircraft was ferried to YWG and when tested, the fault could not be duplicated. A microswitch was replaced and after extensive testing, the aircraft was returned to service. These microswitches are of an improved design installed per S/B 32-025. This aircraft is one of two of the aircraft in the company fleet that uses magnetic landing gear indicators.(Barber-pole) and it has been company experience that this system is problematic during cold weather. For some time now the company Avionics and Engineering departments have been working on an approval for an improved indication system incorporating the landing gear indicators found on the remainder of the fleet. An SDR is pending.
|Occurred At||- 18:20|
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Aircraft Details (1 aircraft)
|Canadian Registration||| Flightaware (Registration) | Flightaware (Tracking) | AvHerald|
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