Air carrier medium large transport on push back was starting #1 engine when ground crew request parking brake be set. Unable account holding start switch and could not activate parking brake. Holding brakes with foot pedals. Problem starting #1 and relaxes pressure on brake allowing aircraft to move forward striking the tow bar. No damage or injuries.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	354170
Time
Date	199611
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : hfn airport : hpn
State Reference	NY
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground : preflight other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 14000 flight time type : 4000
ASRS Report	354170
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe conflict : ground less severe non adherence : published procedure non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During push back and during start of #1 engine, aircraft rolled 3 ft forward and pinched tires against push back bar after ground crew told flight crew to set brakes. During start, I was holding brake pressure with brake pedals and starting #1 engine. I was unable to set brakes with handle because left hand was holding start switch and right hand was holding fuel control switch. At the same time we had problem with start of #1 engine (failed starter). Without knowledge I relaxed brake pressure, aircraft rolled forward and I stepped on brakes. Tires pinched against push back bar. No damage to aircraft or push back vehicle or push back bar, as was inspected by mechanic. No one injured on ramp or aircraft.

Original NASA ASRS Text

Title: ACR MLG ON PUSH BACK WAS STARTING #1 ENG WHEN GND CREW REQUEST PARKING BRAKE BE SET. UNABLE ACCOUNT HOLDING START SWITCH AND COULD NOT ACTIVATE PARKING BRAKE. HOLDING BRAKES WITH FOOT PEDALS. PROB STARTING #1 AND RELAXES PRESSURE ON BRAKE ALLOWING ACFT TO MOVE FORWARD STRIKING THE TOW BAR. NO DAMAGE OR INJURIES.

Narrative: DURING PUSH BACK AND DURING START OF #1 ENG, ACFT ROLLED 3 FT FORWARD AND PINCHED TIRES AGAINST PUSH BACK BAR AFTER GND CREW TOLD FLC TO SET BRAKES. DURING START, I WAS HOLDING BRAKE PRESSURE WITH BRAKE PEDALS AND STARTING #1 ENG. I WAS UNABLE TO SET BRAKES WITH HANDLE BECAUSE L HAND WAS HOLDING START SWITCH AND R HAND WAS HOLDING FUEL CTL SWITCH. AT THE SAME TIME WE HAD PROB WITH START OF #1 ENG (FAILED STARTER). WITHOUT KNOWLEDGE I RELAXED BRAKE PRESSURE, ACFT ROLLED FORWARD AND I STEPPED ON BRAKES. TIRES PINCHED AGAINST PUSH BACK BAR. NO DAMAGE TO ACFT OR PUSH BACK VEHICLE OR PUSH BACK BAR, AS WAS INSPECTED BY MECH. NO ONE INJURED ON RAMP OR ACFT.

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.