Canadian North B732 at Cambridge Bay on Nov 12th 2012, flaps asymmetry

Last Update: November 22, 2012 / 23:12:55 GMT/Zulu time

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Incident Facts

Date of incident
Nov 12, 2012

Classification
Incident

Flight number
4N-447

Aircraft Registration
C-GNDU

Aircraft Type
Boeing 737-200

ICAO Type Designator
B732

An Canadian North Boeing 737-200, registration C-GNDU performing flight 4N-447 from Cambridge Bay,NU to Kuglutuk Coppermine,NU (Canada) with 15 people on board, was climbing out of Cambridge Bay when after retracting the flaps the crew noticed a strong roll tendency of the aircraft requiring a large aileron trim input. The captain requested a flight attendant to have a look onto the flaps, the flight attendant reported on section of the flaps appeared to be still extended. The crew decided to return to Cambridge Bay without requesting assistance, the flaps were normally extended.

The Canadian TSB reported that initial examination found no flaps anomaly. The aircraft was ferried to Yellowknife,NT (Canada) for detailed maintenance inspection. Spindle gap checks, inboard flaps cable booms, flap tracks and more were checked with no fault found. The flaps were cycled a number of times showing normal operation. Maintenance suspected a rock from the previous landing had lodged itsself in the flap's actuating mechanism. The Canadian TSB commented: "While it is rare, this type of snag has occurred before."
Incident Facts

Date of incident
Nov 12, 2012

Classification
Incident

Flight number
4N-447

Aircraft Registration
C-GNDU

Aircraft Type
Boeing 737-200

ICAO Type Designator
B732

This article is published under license from Avherald.com. © of text by Avherald.com.
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