A stopped B737 starts rolling backwards from its gate parking position when the PIC starts on the aircraft parking checklist before setting the parking brakes at ZZZ.

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Attributes
ACN	622355
Time
Date	200309
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 20000 flight time type : 10000
ASRS Report	622355
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	non adherence : published procedure non adherence : company policies other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control other
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft Maintenance Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

After arriving at the gate with the engines shut down we were running the parking checklist when we noticed the jetway slowly moving. At first I was not sure if it was moving or the aircraft was. I realized it was the aircraft and applied the brakes to stop moving. What I had done was to hold the brakes in anticipation of a quick chocks in place signal from the ramp, as usual, instead of setting the parking brake. Apparently my feet slipped down the rudder pedals as I was distraction from doing the checklist and logbook fuel entry. The aircraft moved about 2-3 ft backwards. I checked with the ramp personnel to determine no one was injured or any damage occurred -- all ok just startled. The following things combined to contribute to the situation: we ran the checklist too soon. I should have set the parking brake. I allowed myself to get distraction by complacency and hurrying to get through immigrations and customs. Also, some kind of non-skid surface on the rudder pedals would be nice. This kind of thing can sure get your attention to humble you and make you resolve to be as careful and vigilant as possible.

Original NASA ASRS Text

Title: A STOPPED B737 STARTS ROLLING BACKWARDS FROM ITS GATE PARKING POS WHEN THE PIC STARTS ON THE ACFT PARKING CHKLIST BEFORE SETTING THE PARKING BRAKES AT ZZZ.

Narrative: AFTER ARRIVING AT THE GATE WITH THE ENGS SHUT DOWN WE WERE RUNNING THE PARKING CHKLIST WHEN WE NOTICED THE JETWAY SLOWLY MOVING. AT FIRST I WAS NOT SURE IF IT WAS MOVING OR THE ACFT WAS. I REALIZED IT WAS THE ACFT AND APPLIED THE BRAKES TO STOP MOVING. WHAT I HAD DONE WAS TO HOLD THE BRAKES IN ANTICIPATION OF A QUICK CHOCKS IN PLACE SIGNAL FROM THE RAMP, AS USUAL, INSTEAD OF SETTING THE PARKING BRAKE. APPARENTLY MY FEET SLIPPED DOWN THE RUDDER PEDALS AS I WAS DISTR FROM DOING THE CHKLIST AND LOGBOOK FUEL ENTRY. THE ACFT MOVED ABOUT 2-3 FT BACKWARDS. I CHKED WITH THE RAMP PERSONNEL TO DETERMINE NO ONE WAS INJURED OR ANY DAMAGE OCCURRED -- ALL OK JUST STARTLED. THE FOLLOWING THINGS COMBINED TO CONTRIBUTE TO THE SIT: WE RAN THE CHKLIST TOO SOON. I SHOULD HAVE SET THE PARKING BRAKE. I ALLOWED MYSELF TO GET DISTR BY COMPLACENCY AND HURRYING TO GET THROUGH IMMIGRATIONS AND CUSTOMS. ALSO, SOME KIND OF NON-SKID SURFACE ON THE RUDDER PEDALS WOULD BE NICE. THIS KIND OF THING CAN SURE GET YOUR ATTN TO HUMBLE YOU AND MAKE YOU RESOLVE TO BE AS CAREFUL AND VIGILANT AS POSSIBLE.

Data retrieved from NASA's ASRS site as of July 2007 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.