A B757 flight crew did not set the parking brake after pushback at den, and rolled forward damaging ...

Attributes
ACN	440629
Time
Date	199906
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dia.airport
State Reference	CO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : pushback
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : private pilot : multi engine pilot : instrument pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 165 flight time total : 6750 flight time type : 275
ASRS Report	440629
Events
Anomaly	non adherence : company policies
Independent Detector	other flight crewa other flight crewb other other : 3
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

During pushback, the aft flight attendant rang the cockpit. Captain was monitoring the push crewman, and I was monitoring the ramp controller per SOP. Captain answered the aft flight attendant and got into a discussion with her about a noise. After the start of the right engine, the mechanic backed the tug up to release the tow bar. At that time, the captain and I noticed the aircraft rolling forward and both applied the brakes. The mechanic re-established communications with the captain, and informed him that he inspected the airplane and found no damage, but the tow bar handle was sheared off. Captain said he did not hear the mechanic tell him to set the parking brake during his distraction with the flight attendant.

Original NASA ASRS Text

Title: A B757 FLC DID NOT SET THE PARKING BRAKE AFTER PUSHBACK AT DEN, AND ROLLED FORWARD DAMAGING THE TOW BAR.

Narrative: DURING PUSHBACK, THE AFT FLT ATTENDANT RANG THE COCKPIT. CAPT WAS MONITORING THE PUSH CREWMAN, AND I WAS MONITORING THE RAMP CTLR PER SOP. CAPT ANSWERED THE AFT FLT ATTENDANT AND GOT INTO A DISCUSSION WITH HER ABOUT A NOISE. AFTER THE START OF THE R ENG, THE MECH BACKED THE TUG UP TO RELEASE THE TOW BAR. AT THAT TIME, THE CAPT AND I NOTICED THE ACFT ROLLING FORWARD AND BOTH APPLIED THE BRAKES. THE MECH RE-ESTABLISHED COMS WITH THE CAPT, AND INFORMED HIM THAT HE INSPECTED THE AIRPLANE AND FOUND NO DAMAGE, BUT THE TOW BAR HANDLE WAS SHEARED OFF. CAPT SAID HE DID NOT HEAR THE MECH TELL HIM TO SET THE PARKING BRAKE DURING HIS DISTR WITH THE FLT ATTENDANT.

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.

A B757 flight crew did not set the parking brake after pushback at den, and rolled forward damaging the tow bar.