Incident at GOOSE BAY NL (CYYR)

Summary

2005-10-27: TSB Update:A05A0140: The Air Labrador Dash 8, operating as LAL8302, was on approach to Goose Bay airport when the pilot informed the tower that the left main landing gear was not indicating down and locked. The aircraft crew conferred with company maintenance as they orbited the field. An attempt to lower the left main by the alternate means was unsuccessful. The aircraft manufacturer, through company maintenance, suggested that the crew try selecting the gear up and then immediately down in rapid succession, which was successful. The aircraft landed safely at 1308 ADT. The crew did not declare an emergency nor were AFF crews placed on standby. The aircraft was later ferried (gear down) to the company maintenance facility in St. John's, NL where numerous gear swings were carried out; however, the problem could not be duplicated. Maintenance carried out extensive trouble shooting while consulting with the aircraft manufacturer, and during the process the landing gear hydraulic lines were bled and a large volume of air was purged from the system. It is suspected that the air in the lines resulted in a hydraulic lock, which would account for the alternate gear extension method not being successful. A chafed hydraulic line was replaced several days before the occurrence.
2005-10-19: LAL8302, DH8, enroute from Wabush (CYWK) to Goose Bay (CYYR), advised that pilot was unable to determine the status of the landing gear (no light indication). The pilot conferred with his company and resolved the problem and landed without further incident at CYYR at 1608Z. No emergency was declared, and no emergency crews were placed on standby. TSB Evaluating
2005-10-27: Maintenance & Manufacturing Update: Aircraft C-GAAN MSN 051 arrived to Air Labrador Dispatch in Goose Bay after numerous attempts to extend the L/H Main landing Gear; the crew had noticed the 'Amber' indication of the 'L Door' out of Wabush, in working with the Goose Bay Maintenance and Bombardier Help Desk out of Toronto, the crew successfully deployed all 3 Main Landing Gear down and locked. The aircraft was brought into the hangar and put on jacks, gear swings were carried out, the sequence of door opening and gear moving was ?out? with the selection ?Down?, maintenance personnel stopped the nose gear from moving as it was going to push down on the nose door. The alternate selection was made to get the gear down. The rear debris cover plate in the L/H wheel well was removed, the gear door linkages were inspected, no damage, scuff marks were found on the L/H gear rear doors; at this point maintenance personnel cracked the Hydraulic fitting to bleed the air out of the gear door solenoid sequence valve followed by local bleeding of the gear and door actuators. 25 additional gear swings was carried out in the hangar with no other issues. The aircraft was released for a test flight. The suspect problem was the excess of air in the #2 hydraulic system. Previous to the incident on the 18th, this aircraft had a hydraulic ?Swivel Fitting? on the L/H L/G Stabilizer Stay ?Break? on the 15th and the result of the complete loss of the #2 Hydraulic system. Maintenance action involved the replacement of the ?Swivel Fitting? followed by bleeding procedure and approx. 6 gear swings in the hangar. Bombardier agrees with the additional bleeding carried out of the landing gear system, the inspection of the gear door operating linkages as well as the over center spring and the attachments points (hardware) will take care of the problem that initiated this incident

Details


CADORS Number 2005A0732
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2005-10-18 - 15:50
Day or Night? Day-time
Fatalities 0
Injuries 0
Aerodrome ID CYYR
Aerodrome Name GOOSE BAY NL (CYYR)
Geographic Location Newfoundland and Labrador, Canada, North America, Atlantic Region,
TSB Occurrence Number A05A0140
TSB Class of Investigation Class 5
AOR Number 61852-V1
Reported By NAV CANADA
Categories System/component failure or malfunction [non-powerplant]
Events



Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration GAAN | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Owner LABRADOR AIRWAYS LTD.
Operator LABRADOR AIRWAYS LIMITED (559) Commercial
Make DEHAVILLAND - CAN
Model DHC 8 102
Year Built 1986
Engine Type Turbo prop
Engine Make PRATT & WHITNEY-CAN
Engine Model  Silhouette image of PW120A
PW120A
Gear Type Land
Private No
Amateur Built No
Flight Number LAL8302
Flight Rule
CARS Subpart
Phase of Flight Landing
Damage No Damage
Fatalities 0
Injuries 0
Events Landing gear

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