A B737-300 rolled a few ft after tow bar disconnect because the pilot was not told to set brakes. Pu...

Attributes
ACN	699603
Time
Date	200606
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : grr.airport
State Reference	MI
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-300
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
Experience	flight time last 90 days : 120 flight time total : 14000 flight time type : 180
ASRS Report	699603
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : ground less severe non adherence : company policies non adherence : published procedure other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control
Supplementary
Problem Areas	Flight Crew Human Performance Company
Primary Problem	Ambiguous

Narrative:

Prior to pushback; ramp agent called on interphone to advise that a new tug driver was being trained on how to push back aircraft. The person being trained on how to push back was very hesitant on the radio and his communication was broken. After pushing us off the gate he stopped the tug. However; he never said 'set brakes.' I waited about 5 seconds and then asked if he wanted the brakes set; but never received a response. I have never flown into grr and was not sure how they positioned the aircraft for pushback and was not sure if they had completed the pushback. I lightly depressed the brake pedals to hold the aircraft. The tug then slightly pulled on the aircraft. I was trying to communication with the tug drier but to no avail. I released the brake pedals; thinking he might pull us forward. Then I noticed the plane and tug were moving back towards the gate but at a different rate of speed. The aircraft rolled approximately 2-3 ft before I stopped the plane and set the brakes. Fortunately; no one was hurt; and there wasn't any equipment damage.

Original NASA ASRS Text

Title: A B737-300 ROLLED A FEW FT AFTER TOW BAR DISCONNECT BECAUSE THE PLT WAS NOT TOLD TO SET BRAKES. PUSHBACK TRAINING WAS IN PROGRESS.

Narrative: PRIOR TO PUSHBACK; RAMP AGENT CALLED ON INTERPHONE TO ADVISE THAT A NEW TUG DRIVER WAS BEING TRAINED ON HOW TO PUSH BACK ACFT. THE PERSON BEING TRAINED ON HOW TO PUSH BACK WAS VERY HESITANT ON THE RADIO AND HIS COM WAS BROKEN. AFTER PUSHING US OFF THE GATE HE STOPPED THE TUG. HOWEVER; HE NEVER SAID 'SET BRAKES.' I WAITED ABOUT 5 SECONDS AND THEN ASKED IF HE WANTED THE BRAKES SET; BUT NEVER RECEIVED A RESPONSE. I HAVE NEVER FLOWN INTO GRR AND WAS NOT SURE HOW THEY POSITIONED THE ACFT FOR PUSHBACK AND WAS NOT SURE IF THEY HAD COMPLETED THE PUSHBACK. I LIGHTLY DEPRESSED THE BRAKE PEDALS TO HOLD THE ACFT. THE TUG THEN SLIGHTLY PULLED ON THE ACFT. I WAS TRYING TO COM WITH THE TUG DRIER BUT TO NO AVAIL. I RELEASED THE BRAKE PEDALS; THINKING HE MIGHT PULL US FORWARD. THEN I NOTICED THE PLANE AND TUG WERE MOVING BACK TOWARDS THE GATE BUT AT A DIFFERENT RATE OF SPD. THE ACFT ROLLED APPROX 2-3 FT BEFORE I STOPPED THE PLANE AND SET THE BRAKES. FORTUNATELY; NO ONE WAS HURT; AND THERE WASN'T ANY EQUIP DAMAGE.

Data retrieved from NASA's ASRS site as of January 2009 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 B737-300 rolled a few ft after tow bar disconnect because the pilot was not told to set brakes. Pushback training was in progress.