Date: 201809
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Aircraft: B777 Undifferentiated or Other Model
Operator: Air Carrier
Operating under: Part 121
Mission: Passenger
Flight phase: Other Under Tow into hangar
Aircraft component: Nacelle/Pylon Skin
Component problem: Improperly Operated
Reporter organization: Air Carrier
Reporter function: Technician
Reporter qualification: Maintenance Airframe; Maintenance Powerplant
Human factors: Communication Breakdown; Situational Awareness; Time Pressure; Distraction
Second reporter function: Technician
Anomaly: Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance; Ground Event / Encounter Vehicle
Detector: Person Maintenance
When detected: Other Under Tow
Result: Aircraft Aircraft Damaged; General Maintenance Action
Contributing factors: Environment - Non Weather Related; Equipment / Tooling; Procedure; Staffing; Human Factors
Primary problem: Ambiguous

Narrative: While parking aircraft into bay X at ZZZ airport aircraft incurred damage to right engine nose cowl outboard side. I was wing walking the right side vigilant of any obstacles to the wing tip and the right main gear I quickly noticed the right engine was getting very close to a vehicle parked ahead of it. I hit the alert button on the wands but nothing happened; then in a moment of desperation thinking it was out of range I raised both arms and proceeded to continuously hit the buttons and just watched as the engine plowed unto the truck that was parked. This was a last minute move that changed in the middle of the original move. The bay was not ready and cleared of all potential obstructions. There was a lot of aircraft movement in the area at the time the incident happened. I find the bay to be a mess of equipment and there are no clear lines to distinguish if the wings or the engines are clear and it is left up to human judgment. With the quick change of locations the sunset light blaring through the bay I felt overwhelmed with too much for a single person to observe but I didn't realize that until the incident. There is a line on the floor that I initially thought was a clearance line but only at the end did I realize it is not a clearance line. Actually I am not sure what the line is even for up to now. With all the equipment in the bay I tried to put myself in a position that would keep me in visual contact with the driver and yet still see the wing and engine the other spot would have been under the wing but there is massive amounts of equipment stored there on a regular basis so you can't walk under the wing but only between the wing and the engine if you want to see the driver. This puts me in a poor position and even though I saw the strike coming the wand delays (possibly even wand failure) and timing didn't allow me to prevent this incident.I feel there should be clearance lines on the floor for engines and wings. There is just too much going on for this to be left up to people to continuously make over the great distances that a 777 covers even if it is just a wing and engine. I feel this type of help would at least give me a head start in preventing this incident. I would also like to see a regular assigned hangar tow safety guy to help out with quick changes that give us very little time to prepare a bay.


Second narrative: While towing Aircraft X; we were told to bring the plane to Bay X. Bay X was cluttered we needed to move some equipment and hangar doors so we all pitched in and cleared the bay up it was very hectic as usual with all the action the bay appeared to be cleared up at least my side was good the left side. So we proceeded to bring the plane in with all the equipment under the wings in the normal staging area it can get quite burdensome. This event occurred because the time frame they expect the moves to be accomplished in without the appropriate marking on the ground to keep the wings and the engines clear of equipment and debris is almost nonexistent. They need to revamp the hangar with the appropriate marking to keep the equipment out of the way. We should also have the [Crew Chief] present on hangar moves.


Synopsis: Air Carrier Maintenance crew reported an aircraft being towed into a hangar struck a parked truck.