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.


CADORS Number 2003C0054
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2003-01-14 - 18:20
Day or Night? Day-time
Fatalities 0
Aerodrome ID CYST
Geographic Location Manitoba, Canada, North America, Prairie and Northern Region, St. Theresa Point
TSB Occurrence Number A03C0010
TSB Class of Investigation Class 5
AOR Number 27019
Reported By NAV CANADA
Categories Undershoot/overshoot,System/component failure or malfunction [non-powerplant]

Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration FSLZ | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Operator PERIMETER AIRLINES (INLAND) LTD. (3254) Commercial
Make  Silhouette image of SWEARINGEN
Model SA226TC
Year Built 1976
Engine Type Turbo prop
Engine Make  Silhouette image of GARRETT
Engine Model  Silhouette image of TPE331-10UA
Gear Type Land
Private No
Amateur Built No
Flight Number PAG 621
Flight Rule
CARS Subpart
Phase of Flight Approach
Damage No Damage
Fatalities 0
Injuries 0
Events Landing gear,Overshoot/missed approach

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