A lead mechanic and mechanic report about an A321 aircraft that collided into a hangar door. The air...

Narrative:

I pushed an A321 off a gate for reposition to the hangar. Mechanic 'X' was in the left seat; mechanic 'Y' was in the right seat. I then drove to the hangar. When I arrived at hangar; the aircraft was waiting for me at the hangar for a stair-truck to placed on it. I pulled up to the aircraft and parked in front of the aircraft; I saw the nose gear parking brake indicator light was on. I got out of the van and walked to the north wall for a stair-truck. As I pulled up to the l1 (left forward) door; I was guided by mechanic 'Y' who was in the forward galley of the aircraft.I placed the stair-truck on the aircraft and attempted to put the outriggers down and they did not work. After a short delay I found the truck hydraulic pump switch in the 'off' position. I placed it 'on' and lowered the outriggers. I saw mechanic 'Y' come down the stairs but did not see where he went. I got back in the van and went back to terminal gate. Mechanic 'Y' observed the aircraft rolling away. [There was] a failure to chock the aircraft.

Original NASA ASRS Text

Title: A Lead Mechanic and Mechanic report about an A321 aircraft that collided into a hangar door. The aircraft had rolled away from a spot the Airbus was positioned on; after being taxied to the hangar. The parking brake was verified set yet chocks were not placed under nose tires or main tires.

Narrative: I pushed an A321 off a gate for reposition to the hangar. Mechanic 'X' was in the left seat; Mechanic 'Y' was in the right seat. I then drove to the hangar. When I arrived at hangar; the aircraft was waiting for me at the hangar for a Stair-truck to placed on it. I pulled up to the aircraft and parked in front of the aircraft; I saw the nose gear parking brake indicator light was on. I got out of the van and walked to the north wall for a stair-truck. As I pulled up to the l1 (Left forward) door; I was guided by Mechanic 'Y' who was in the forward galley of the aircraft.I placed the stair-truck on the aircraft and attempted to put the outriggers down and they did not work. After a short delay I found the truck hydraulic pump switch in the 'off' position. I placed it 'on' and lowered the outriggers. I saw Mechanic 'Y' come down the stairs but did not see where he went. I got back in the van and went back to terminal gate. Mechanic 'Y' observed the aircraft rolling away. [There was] a failure to chock the aircraft.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	909171
Time
Date	201009
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Fuselage
Person 1
Function	Lead Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Person 2
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Ground Event / Encounter Object Inflight Event / Encounter Object

A lead mechanic and mechanic report about an A321 aircraft that collided into a hangar door. The aircraft had rolled away from a spot the airbus was positioned on; after being taxied to the hangar. The parking brake was verified set yet chocks were not placed under nose tires or main tires.