Let Kunovice: L-23 Super Blanik Cracked Elevator Hinge Brackets During a 100-hour inspection, several cracks were discovered on the inboard elevator hinge bracket (p/n A730258N). Additional cracks were found on the seven aircraft after a fleet- 288
Crack Me Up
During a 100-hour inspection, several cracks were discovered on the inboard elevator hinge bracket (p/n A730258N). Additional cracks were found on the seven aircraft after a fleet-wide, one-time inspection was completed. Aircraft times varied from a low of 2507.7 hours to the group high of 2740.3 hours. The difference is a mere 232.6 hours, with 2671.4 the average of the seven records. Everything is cracking right on schedule-you could plan a vacation period around these numbers.
Key Takeaways:
- Cracks were discovered in critical aircraft components, specifically L-23 Super Blanik elevator hinge brackets (averaging 2671.4 hours) and a Pilatus PC-12-47 flap drive arm assembly (at 8000 hours).
- Engine integrity issues included a cracked Lycoming TIO-540 engine case, resulting in low oil pressure.
- Cylinder component failures involved ECI valve keys pulling through their spring seat, causing damage, and Superior exhaust valves sticking, leading to bent push rods and piston contact.
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