A B737 captain failed to release the parking brake before he initiated gate pushback resulting in sh...

Attributes
ACN	1108044
Time
Date	201308
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B737-700
Flight Phase	Taxi
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 314
Person 2
Function	First Officer
Experience	Flight Crew Last 90 Days 327
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Narrative:

After a fairly lengthy delay; we started our pushback. We were trying to get things moving. I believe in my haste; I had released the parking brake; but I didn't verify the red light extinguished. In short; in my haste I lost my sa. The pushback guy mentioned he thought a chock was still under the wheels. After verifying there wasn't a chock; he continued pushing the aircraft. Shortly; there was a bang; the tow bar pin had sheared; and the nose wheel was cocked to the left past the turning point markers. Maintenance was notified. Logbook entry made. Maintenance had to do an inspection. Regardless of any situation; distractions; etc.; I need to slow down and double check myself when things aren't exactly in a normal comfortable flow.

Original NASA ASRS Text

Title: A B737 Captain failed to release the parking brake before he initiated gate pushback resulting in sheared tow bar bolts and the nose wheel turning to an unusual angle.

Narrative: After a fairly lengthy delay; we started our pushback. We were trying to get things moving. I believe in my haste; I had released the parking brake; but I didn't verify the red light extinguished. In short; in my haste I lost my SA. The pushback guy mentioned he thought a chock was still under the wheels. After verifying there wasn't a chock; he continued pushing the aircraft. Shortly; there was a bang; the tow bar pin had sheared; and the nose wheel was cocked to the left past the turning point markers. Maintenance was notified. Logbook entry made. Maintenance had to do an inspection. Regardless of any situation; distractions; etc.; I need to slow down and double check myself when things aren't exactly in a normal comfortable flow.

Data retrieved from NASA's ASRS site as of July 2013 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.

A B737 captain failed to release the parking brake before he initiated gate pushback resulting in sheared tow bar bolts and the nose wheel turning to an unusual angle.