Several mechanics reported that when pushing back a boeing 777 the ttws (tow team warning system) di...

Attributes
ACN	1386256
Time
Date	201609
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Aircraft 2
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Other / Unknown Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Person 2
Function	Other / Unknown Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Ground Event / Encounter Aircraft

Narrative:

Tug driver in tld tug; during pushback struck an aircraft parked behind the aircraft I was pushing back. I volunteered to help push aircraft X off of spot X and tow it to spot Y as no one on taxi two crew 2 was qualified on the tld. Crew 2 and a tail walker were involved in the push. The move was not assigned to the correct crew; as no one on crew 2 was qualified to drive the tld. After completing our last minute move I rushed to help crew 2 complete the move of aircraft X. I was not part of crew 2 and arrived at the airplane prior to the rest of the crew. The ttws is only tested prior to our first move of the day and then left armed until we clock out and leave for the day. The tld is shared equipment; and the system was turned off prior to this move. The ttws should be on and armed once the tug is started. It should not have the ability to be switched off. 777's should no longer be parked at spot X. The overall lack of training needs to be address in a timelier manner.

Original NASA ASRS Text

Title: Several mechanics reported that when pushing back a Boeing 777 the TTWS (Tow Team Warning System) did not function and the aircraft's RH wing tip struck the RH elevator of another aircraft.

Narrative: Tug driver in TLD tug; during pushback struck an aircraft parked behind the aircraft I was pushing back. I volunteered to help push Aircraft X off of Spot X and tow it to Spot Y as no one on Taxi Two Crew 2 was qualified on the TLD. Crew 2 and a Tail Walker were involved in the push. The move was not assigned to the correct Crew; as no one on Crew 2 was qualified to drive the TLD. After completing our last minute move I rushed to help Crew 2 complete the move of Aircraft X. I was not part of Crew 2 and arrived at the airplane prior to the rest of the crew. The TTWS is only tested prior to our first move of the day and then left armed until we clock out and leave for the day. The TLD is shared equipment; and the system was turned off prior to this move. The TTWS should be on and armed once the tug is started. It should not have the ability to be switched off. 777's should no longer be parked at Spot X. The overall lack of training needs to be address in a timelier manner.

Data retrieved from NASA's ASRS site 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.

Several mechanics reported that when pushing back a boeing 777 the ttws (tow team warning system) did not function and the aircraft's rh wing tip struck the rh elevator of another aircraft.