An aircraft mechanic describes the events that led to an air turnback of a gulfstream g-v aircraft. ...

Narrative:

May 2012 evening; I was dispatched to go to ZZZ1 to work on a gulfstream g-v aircraft. I was told it had a # 4 brake assembly that was worn to limits and that I would need to make arrangements to go to our repair station at ZZZ to acquire the proper tooling. I left my house at xa:00 am the next morning to fly to ZZZ2. My flight was delayed one hour; so I didn't arrive until noon. I then drove to our repair station facility in ZZZ to pickup equipment; I left there approximately two and a half hours later. I then drove to ZZZ1 (139 miles). It took me six hours in rush hour/holiday traffic to make the trip. I met up with mechanic Y. We got to the aircraft and started to work on the aircraft. I disconnected the right outboard main landing gear (medium large transport) door rod end from the outboard medium large transport door and I reinstalled the hardware into rod end so we wouldn't lose it. I then used a rubber chock to prop the main gear door outward so we could get the # 4 tire/wheel assembly off; to gain access to the # 4 brake. When we went to pull the wheel off; mechanic Y bumped the door and the chock fell down; so mechanic Y used the rod assembly and placed it against the gear door to keep it out of our way. We got the wheel assembly off and started removing the brake. [An] air-turn back [occurred later.]

Original NASA ASRS Text

Title: An Aircraft Mechanic describes the events that led to an air turnback of a Gulfstream G-V aircraft. He and another Mechanic had just completed a # 4 brake change on the right-hand Main Landing Gear (MLG); but failed to reconnect the outboard MLG door.

Narrative: May 2012 evening; I was dispatched to go to ZZZ1 to work on a Gulfstream G-V aircraft. I was told it had a # 4 Brake Assembly that was worn to limits and that I would need to make arrangements to go to our Repair Station at ZZZ to acquire the proper tooling. I left my house at XA:00 am the next morning to fly to ZZZ2. My flight was delayed one hour; so I didn't arrive until noon. I then drove to our Repair Station facility in ZZZ to pickup equipment; I left there approximately two and a half hours later. I then drove to ZZZ1 (139 miles). It took me six hours in rush hour/holiday traffic to make the trip. I met up with Mechanic Y. We got to the aircraft and started to work on the aircraft. I disconnected the right outboard Main Landing Gear (MLG) door rod end from the outboard MLG door and I reinstalled the hardware into rod end so we wouldn't lose it. I then used a rubber chock to prop the Main Gear door outward so we could get the # 4 Tire/Wheel Assembly off; to gain access to the # 4 brake. When we went to pull the wheel off; Mechanic Y bumped the door and the chock fell down; so Mechanic Y used the rod assembly and placed it against the gear door to keep it out of our way. We got the wheel assembly off and started removing the brake. [An] air-turn back [occurred later.]

Data retrieved from NASA's ASRS site as of July 2013 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	1013893
Time
Date	201205
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	Gulfstream V / G500 / G550
Flight Phase	Parked
Component
Aircraft Component	Main Gear Door
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

An aircraft mechanic describes the events that led to an air turnback of a gulfstream g-v aircraft. He and another mechanic had just completed a # 4 brake change on the right-hand main landing gear (medium large transport); but failed to reconnect the outboard medium large transport door.