SAFE
The work is physically embedded in airframes: pulling and terminating wire bundles in bulkheads and wing roots, bench-testing and swapping LRUs, running ramp-side troubleshooting on intermittent faults that no schematic predicts, and torquing connectors in spaces built for hands, not robots. AI will absorb the paperwork layer — fault-code interpretation, manual lookup, wiring-diagram search, logbook drafting — but a certificated human still signs the return-to-service entry and personally carries FAA liability for it. The diagnostic call on an unrepeatable squawk, where the choice is ground the aircraft or release it, is exactly the accountable judgment that doesn't delegate.
Tasks largely resist digitisation. At 15, the resistant core is physical fault isolation — pin-to-pin continuity checks on a chafed harness behind a cockpit panel, tracing an intermittent that only appears at altitude or after a hard landing — while the parts AI genuinely takes (BITE code lookup, IPC and wiring-manual search, work-card drafting) keep it out of the 17-plus range where nothing offloads.
Hands-on in uncontrolled environments. 18 reflects work done inside the airframe and on open ramps: contorting into avionics bays and wheel wells, crimping and pinning connectors by feel, hauling test sets and pitot-static rigs to the aircraft in whatever weather the gate has, with only bench work on removed LRUs happening in a controlled shop.
Licensed human required and personally liable. 14 rests on the FAA certificate — A&P under 14 CFR Part 65 or repairman/repair-station authorisation under Part 145 — where your signature on the maintenance record and return-to-service entry is enforceable against you personally, short of the 18-20 band because much avionics work is signed off under a repair station's certificate rather than your own individual ticket.
Some relationship component. 9 because the pilot, dispatcher and lead who ask for you by name after you found the wiring fault three others chased do so within an employer relationship — the airline or MRO holds the customer, and your work is auditable from the logbook by any other certificated tech.
Exists to be accountable for ambiguous calls. 15 is the no-fault-found squawk: with no code, a schedule waiting and an MEL that may or may not cover it, you decide whether to release the aircraft or ground it, and that call is yours in the record rather than a step in a task card.
Has AI actually changed your work?