Narrative:

While reviewing the logbook during the cockpit setup of a cold/secured airplane; the un-chocked plane moved back on the gate and caught the door on the jet bridge. The aircraft stopped when the door snagged the jet bridge. The brakes appeared to be on; but the loss of braking memory items were run to verify brakes were working. Yellow hydraulic pressure was boosted with the electric pump to charge the accumulator. Operations and maintenance were immediately notified to assist. I'm not a rocket scientist; but I would say that chocking the wheels would be an idea worthy of consideration. Evidently there had been a ramp closure due to lightning being seen in the vicinity; and the previous crew were unable to have chocks installed. Unbeknown to this new crew (that the wheels weren't chocked; or that the ramp was closed) there was no reason to suspect anything was other than normal. The brakes should have held the aircraft without the need for chocks; so I'm still scratching my head as to why this event occurred. Hopefully the experts will be able to determine the reason. In cases such as this; it would be good for the new crew to be made aware of the fact that chocks had not been put in place; as well as the fact that lightning had closed the ramp; so the pilot conducting the preflight would not be put in harms way; and that any potential injuries or damage be prevented from system failure or human error.

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Original NASA ASRS Text

Title: An A319 parked un-chocked at the gate because of lightning during the arrival; rolled backward and lodged the door on the jetway after the parking brake pressure depleted.

Narrative: While reviewing the logbook during the cockpit setup of a cold/secured airplane; the un-chocked plane moved back on the gate and caught the door on the jet bridge. The aircraft stopped when the door snagged the jet bridge. The brakes appeared to be ON; but the loss of braking memory items were run to verify brakes were working. Yellow Hydraulic pressure was boosted with the electric pump to charge the accumulator. Operations and Maintenance were immediately notified to assist. I'm not a rocket scientist; but I would say that chocking the wheels would be an idea worthy of consideration. Evidently there had been a ramp closure due to lightning being seen in the vicinity; and the previous crew were unable to have chocks installed. Unbeknown to this new crew (that the wheels weren't chocked; or that the ramp was closed) there was no reason to suspect anything was other than normal. The brakes should have held the aircraft without the need for chocks; so I'm still scratching my head as to why this event occurred. Hopefully the experts will be able to determine the reason. In cases such as this; it would be good for the new crew to be made aware of the fact that chocks had not been put in place; as well as the fact that lightning had closed the ramp; so the pilot conducting the preflight would not be put in harms way; and that any potential injuries or damage be prevented from system failure or human error.

Data retrieved from NASA's ASRS site 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.