Why AA would allow any OH to line bumping is beyond me. Why should an OH mech with a different skillset be allowed to bump a fully qualified and experienced line mech?
Your average low time TULE mech is only qualified on the MD80. Let's look at what would be required if he were to say bump into....DFW.
777 Fam. 2 weeks
777-300differences. 1 week
Airbus 2 weeks
767 1 week
757 1 week
737 1 week
Then add avionics classes 2-3 weeks
Add other training: ETOPS, Logbooks, ground handling , run up-taxi, LMP, etc
Add various CBTs
Add airport classes, airport badge, customs badge.
After all this you still have an AMT with NO EXPERIENCE on these fleet types
How do you open the engine cowl on a 767? How are you going to fix that first-class seat (for which the passenger paid $7000)on a 777-300 on a gate call?
No wonder AA has raised the bar. No where else in the working would the bumping nonsense be allowed.