A pilot stabbed his captain mid-flight on flydubai FZ 1073, carrying 170-plus passengers from Dubai to Tel Aviv. The captain, Smit Machchhar, fought back and — critically — ensured the cockpit door could be breached so cabin crew and passengers could intervene. The plane landed safely. But the outcome depended on one wounded man's decision-making under attack, not on any systemic safeguard. The episode reopens a structural question the aviation industry has avoided resolving for a decade. After 9/11, cockpit doors were redesigned as fortresses: locked from the inside, pilot holds the override key. The logic was simple — keep hijackers out. But the design assumed the threat would always come from outside the cockpit. It didn't account for what happens when the threat is already at the controls. Aviation security expert Philip Baum states the calculus plainly: more lives have been lost to aircraft-assisted pilot suicide on commercial flights since 9/11 than to terrorism. The Germanwings disaster in 2015, where a suicidal co-pilot locked the captain out and flew 150 people into the French Alps, is the clearest case. Mozambique Airlines in 2013 killed 33 under similar circumstances. Questions persist around MH370, a 2025 Air India crash in Ahmedabad, and China Eastern in 2022. Even without malice, the lock architecture creates fragility. In 2024, a Lufthansa co-pilot blacked out over Spain and the captain — locked out while using the bathroom — relied on an emergency code to re-enter. That code works only if no one inside actively blocks it. A conscious attacker can. The two-pilot rule exists primarily for medical incapacitation, not for one pilot going rogue. The entire system rests on pre-employment screening — background checks, psychological evaluations, ongoing fitness monitoring. But as the article notes, pilots are already reluctant to disclose mental health issues, knowing it can end their careers. The screening regime is only as good as the honesty it incentivizes, and the incentive structure punishes disclosure. Israel is now moving to enhanced pilot screening for routes it oversees. Flydubai has cancelled Tel Aviv services. British ministers say they'll "be looking at" flight safety. These are downstream reactions to the specific incident, not structural fixes to the architectural problem. The UK pilots' union Balpa cautioned against premature speculation, which is reasonable — and also what unions always say. Baum argues for some form of cockpit-door override: timed, ground-controlled, or otherwise. The design problem is real and unsolved. Aviation security built a wall optimized for one threat vector and inadvertently created an unbreachable refuge for another. The flydubai crew survived because one injured pilot made the right call in real time. That is heroism, not a system.