3 ms·
The part was found damaged at 35,000 cycles. That means it took less than or equal to 35,000 cycles. It's not clear whether it cracked earlier, how many such fa
by Pfhreak 7y ago
The part was found damaged at 35,000 cycles. That means it took less than or equal to 35,000 cycles. It's not clear whether it cracked earlier, how many such failures would be needed to down the plane, etc.
- mieseratte 7y agoAssuming a proper maintenance schedule, we can reasonably reduce that time window.
- djsumdog 7y agoHow often are these particular frame components inspected for cracks or wear?
- alexis_fr 7y agoI don’t know for these. C-checks for 737NG are performed every 730 days and include corrosion/wear checks for the most stressed parts, but not all parts (which are checked at D checks): https://en.wikipedia.org/wiki/Aircraft_maintenance_checks https://en.wikipedia.org/wiki/Aircraft_maintenance_checks
- hn_throwaway_99 7y agoThe article indicated the crack was found not during a regular inspection, but during modifications: "Boeing notified the agency of the matter after it discovered the cracks while conducting modifications on a heavily used aircraft." And they only found the cracks in other aircraft after specifically looking for it after they noticed the crack in the first aircraft, so it doesn't sound like something checked as part of routine maintenance.