A B767-300 encountered a split flap condition on arrival. They performed a go-around and appropriate...

Attributes
ACN	847943
Time
Date	200908
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Component
Aircraft Component	Flap Control (Trailing & Leading Edge)
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 144 Flight Crew Total 8850 Flight Crew Type 2055
Events
Anomaly	Aircraft Equipment Problem Critical Conflict Airborne Conflict Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

Whilst configuring for landing; we experienced a 'split flap indication' at 15/20 degrees respectively. We returned the flaps to an equal setting at 15 degrees; executed a missed approach and requested vectors to a downwind to analyze the situation better. After overflying the field we turned cross and downwind to run the checklists and comply with SOP's. We misunderstood a vector and thought as an emergency aircraft we were cleared for the approach. As we were VMC we got within 3 miles of another aircraft while correcting with no loss of separation. We then landed uneventfully; terminated the emergency after clearing the runway and taxied to parking. The aircraft was written up and we briefed the waiting maintenance and FAA personnel. The cause was probably the flap indicator and the cold soaked flap system lag. In this; my first experience with an emergency; I found that a four man crew delayed the analyzing of the problem. It is not something we train for and the division of labor needed to be better defined. This was compounded by the end of a 12:35 flight that was launched out six hours later than scheduled.

Original NASA ASRS Text

Title: A B767-300 encountered a split flap condition on arrival. They performed a go-around and appropriate checklists followed by a safe landing.

Narrative: Whilst configuring for landing; we experienced a 'split flap indication' at 15/20 degrees respectively. We returned the flaps to an equal setting at 15 degrees; executed a missed approach and requested vectors to a downwind to analyze the situation better. After overflying the field we turned cross and downwind to run the checklists and comply with SOP's. We misunderstood a vector and thought as an emergency aircraft we were cleared for the approach. As we were VMC we got within 3 miles of another aircraft while correcting with no loss of separation. We then landed uneventfully; terminated the emergency after clearing the runway and taxied to parking. The aircraft was written up and we briefed the waiting maintenance and FAA personnel. The cause was probably the flap indicator and the cold soaked flap system lag. In this; my first experience with an emergency; I found that a four man crew delayed the analyzing of the problem. It is not something we train for and the division of labor needed to be better defined. This was compounded by the end of a 12:35 flight that was launched out six hours later than scheduled.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.