An A319 captain reports that he and his first officer apparently did not hear a tower controller's h...

Narrative:

Departing ZZZ runway we were cleared for takeoff. Captain flying; first officer on the radio. ZZZ tower cleared us for takeoff and an immediate left turn heading 165; first officer read back the clearance and a heading of 165 degrees. When airborne the first officer raised the gear handle and we got a continuous repetitive chime and a flashing red master warning light. Captain yelled 'select heading' and turned to the preselected heading of 165. The warning chime and light were caused by an ECAM message of left/G not down and locked. The chime would not silence by using the red warning light; so we had to use the all clear button. This took a few moments. During this time we may have missed a call from the tower. When the warning chime was finally silenced we heard the tower tell us to turn to a heading of 065 now. We did so immediately. Then it dawned on me that maybe our initial heading should have been 065 and not the 165 we turned to. We may have misheard tower's instructions and the tower did not catch our read back error. Nothing else was mentioned by the tower after we turned to a heading of 065. We should have listened more closely. I normally take off from runway xx and I did not notice anything wrong with a 165 heading off of runway yy. Tower controllers could speak a little slower.

Original NASA ASRS Text

Title: An A319 Captain reports that he and his First Officer apparently did not hear a Tower Controller's heading clearance during takeoff; due to a continuous repetitive chime and flashing red master warning light in the cockpit caused by an ECAM message of L/G NOT DOWN AND LOCKED.

Narrative: Departing ZZZ runway we were cleared for takeoff. Captain flying; First Officer on the radio. ZZZ Tower cleared us for takeoff and an immediate left turn heading 165; First Officer read back the clearance and a heading of 165 degrees. When airborne the First Officer raised the gear handle and we got a continuous repetitive chime and a flashing red master warning light. Captain yelled 'select heading' and turned to the preselected heading of 165. The warning chime and light were caused by an ECAM message of L/G NOT DOWN AND LOCKED. The chime would not silence by using the red warning light; so we had to use the all clear button. This took a few moments. During this time we may have missed a call from the Tower. When the warning chime was finally silenced we heard the Tower tell us to turn to a heading of 065 now. We did so immediately. Then it dawned on me that maybe our initial heading should have been 065 and not the 165 we turned to. We may have misheard Tower's instructions and the Tower did not catch our read back error. Nothing else was mentioned by the Tower after we turned to a heading of 065. We should have listened more closely. I normally take off from Runway XX and I did not notice anything wrong with a 165 heading off of Runway YY. Tower Controllers could speak a little slower.

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.

Attributes
ACN	868445
Time
Date	201001
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	A319
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb Takeoff
Route In Use	Vectors
Flight Plan	IFR
Component
Aircraft Component	Landing Gear Indicating System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 10000 Flight Crew Type 1500
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Track / Heading All Types

An A319 captain reports that he and his first officer apparently did not hear a tower controller's heading clearance during takeoff; due to a continuous repetitive chime and flashing red master warning light in the cockpit caused by an ECAM message of left/G not down and locked.