Air carrier hits jetway when parking brake is set. No pressure was indicated.

Attributes
ACN	453130
Time
Date	199910
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mmmx.airport
State Reference	FO
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
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 : instrument pilot : atp pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 10000 flight time type : 1500
ASRS Report	453130
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	aircraft equipment problem : critical conflict : ground critical ground encounters other inflight encounter other non adherence : published procedure non adherence : company policies
Resolutory Action	none taken : insufficient time none taken : detected after the fact
Consequence	other other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Upon arrival at mex gate, the aircraft was brought to a complete stop and the parking brake was set. The first officer and I then proceeded with the postflt duties. Shortly thereafter, there was a banging on the side of the fuselage. The first officer and I both looked up and noticed the guideman signaling for a stop. The first officer and I both applied maximum braking and brought the aircraft to a stop. While holding the brakes, I verified the parking brake was on and then looked at the brake pressure indicator, which showed normal accumulator pressure but zero pressure for the parking brake. I then released the parking brake and then reset it and verified normal parking brake pressure. Further investigation revealed that the aircraft rolled forward approximately 15-20 ft before it was stopped. During the movement the left engine cowling contacted the jetway and received an approximately 3 inch gash on the top of the cowl. Contributing to this incident was the fact that I was momentarily distraction when setting the parking brake. My attention was diverted away when the first officer queried about shutting down the #2 engine. I looked away from the brake gauge to verify that the APU was available. Therefore, I was not able to verify proper parking brake pressure when it was initially set. Clearly full attention should be devoted to the most important task at hand, prior to moving on to the next one.

Original NASA ASRS Text

Title: ACR HITS JETWAY WHEN PARKING BRAKE IS SET. NO PRESSURE WAS INDICATED.

Narrative: UPON ARR AT MEX GATE, THE ACFT WAS BROUGHT TO A COMPLETE STOP AND THE PARKING BRAKE WAS SET. THE FO AND I THEN PROCEEDED WITH THE POSTFLT DUTIES. SHORTLY THEREAFTER, THERE WAS A BANGING ON THE SIDE OF THE FUSELAGE. THE FO AND I BOTH LOOKED UP AND NOTICED THE GUIDEMAN SIGNALING FOR A STOP. THE FO AND I BOTH APPLIED MAX BRAKING AND BROUGHT THE ACFT TO A STOP. WHILE HOLDING THE BRAKES, I VERIFIED THE PARKING BRAKE WAS ON AND THEN LOOKED AT THE BRAKE PRESSURE INDICATOR, WHICH SHOWED NORMAL ACCUMULATOR PRESSURE BUT ZERO PRESSURE FOR THE PARKING BRAKE. I THEN RELEASED THE PARKING BRAKE AND THEN RESET IT AND VERIFIED NORMAL PARKING BRAKE PRESSURE. FURTHER INVESTIGATION REVEALED THAT THE ACFT ROLLED FORWARD APPROX 15-20 FT BEFORE IT WAS STOPPED. DURING THE MOVEMENT THE L ENG COWLING CONTACTED THE JETWAY AND RECEIVED AN APPROX 3 INCH GASH ON THE TOP OF THE COWL. CONTRIBUTING TO THIS INCIDENT WAS THE FACT THAT I WAS MOMENTARILY DISTR WHEN SETTING THE PARKING BRAKE. MY ATTN WAS DIVERTED AWAY WHEN THE FO QUERIED ABOUT SHUTTING DOWN THE #2 ENG. I LOOKED AWAY FROM THE BRAKE GAUGE TO VERIFY THAT THE APU WAS AVAILABLE. THEREFORE, I WAS NOT ABLE TO VERIFY PROPER PARKING BRAKE PRESSURE WHEN IT WAS INITIALLY SET. CLRLY FULL ATTN SHOULD BE DEVOTED TO THE MOST IMPORTANT TASK AT HAND, PRIOR TO MOVING ON TO THE NEXT ONE.

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.