Incident at FORT MCMURRAY AB (CYMM)

Summary

2005-06-06: UPDATE Maintenance and Manufacturing reported that during the regular scheduled afternoon departure out of Fort McMurray for Calgary, the crew experienced a concern with the retraction of the landing gear. The left main wheel and the nose gear retracted normally, but the right main gear would not retract. At this time, the flight crew observed that the hydraulic fluid level and operating pressure indicated low. The decision was made to perform an emergency gear extension and after orbiting to reduce the fuel load, return for a landing at Fort McMurray. A successful landing was carried out. Upon inspection of the aircraft, it was found that a 'Swivel Fitting' in the main hydraulic retraction/extension system of the right main landing gear had developed a leak. Further inspection of the Swivel Fitting (p/n L38710SA - Item 390 in Figure 50 of Chapter 32-30-00 in the SAAB 340A Illustrated Parts Catalog) had broken and failed internally, causing a loss of hydraulic system pressure and fluid content. A new Swivel Fitting was acquired and subsequently installed on the ramp at Fort McMurray. After servicing the hydraulic system, bleeding the brakes, ensuring that the nose wheel steering functioned appropriately and preparing the aircraft to apply MEL 32-33-1 'Landing Gear Extension/ Retraction Control System - Inoperative' and MEL 32-34-1 'Explosive Bolt(s) - Activated - Not Replaced', the aircraft was flown to Calgary for restoration/ replacement of the explosive bolts, gear swings and function checks prior to going back into scheduled service on the morning of June 4th. The failed Swivel Fitting has been retained for anticipated assessment. An SDR has been submitted as well as the incident description has been relayed to the SAAB Aircraft Technical Support Department.
2005-06-01: CPB 503, a Saab 340, departed Fort McMurray for Calgary and a short time later, the crew reported a hydraulic problem. They observed a loss of hydraulic pressure and elected to circle the airport and consult with maintenance. The crew then extended the landing gear using the auxiliary system and landed safely at 0152Z. The nosewheel steering was affected, but the crew managed to get the a/c off the runway and parked on a taxiway. The cause of the loss of hydraulic fluid is not known.

Details


CADORS Number 2005C1067
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2005-06-01 - 01:46
Day or Night? Day-time
Fatalities 0
Injuries
Aerodrome ID CYMM
Aerodrome Name FORT MCMURRAY AB (CYMM)
Geographic Location Alberta, Canada, North America, Prairie and Northern Region, Fort McMurray
TSB Occurrence Number
TSB Class of Investigation
AOR Number 56521-V1
Reported By NAV CANADA
Categories System/component failure or malfunction [non-powerplant],Other
Events



Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration GXPS | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Owner CORPAC CANADA LTD - CORPORATE EXPRESS
Operator CORPAC CANADA LTD. (6489) Commercial
Make  Silhouette image of SAAB
SAAB
Model SF340A
Year Built 1986
Engine Type Turbo prop
Engine Make GENERAL ELECTRIC
Engine Model CT7-5A2
Gear Type Land
Private No
Amateur Built No
Flight Number CPB 503
Flight Rule
CARS Subpart
Phase of Flight Climb
Damage No Damage
Fatalities 0
Injuries 0
Events Landing gear,Diversion,Hydraulic problem

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