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Cracked, Loose, Failed

New deice boots were installed on all three blades of this Hartzell propeller, which later was mounted by the owners mechanic. One of the three boots came off after approximately seven hours of flying, resulting in a dent on the aircraft fuselage. When installing a new boot on the propeller, we observed the adhesive did not separate from the blade. The boots on this propeller are long strap boots. If properly positioned during spinner installation, it remains contained within the spinner. Since the two remaining boots remained attached, it is likely the boot strap was not positioned properly during spinner installation, resulting in the boot separating from the blade. Goodrich p/n 4E1188-3.

Gemini Sparkle

Key Takeaways:

  • A deice boot on a Beech A60 Duke propeller separated after only 7 hours of flight, likely due to improper positioning during spinner installation.
  • A fabric patch on a Cessna 140 wing failed in flight, prompting a recommendation for a full wing re-cover using new fabric and pinked-edged tapes.
  • Cracked bulkheads were discovered on Cessna 177RG Cardinals, with a potential cause being the factory's omission of an intended reinforcement on the right wing.
  • Severe and critical pitting corrosion was found on the hard-to-inspect rear wing attach fittings of a Piper PA28-151, highlighting the need for regular cleaning and thorough inspection of this area.
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Beech A60 Duke

Deice Boot Separation

New deice boots were installed on all three blades of this Hartzell propeller, which later was mounted by the owners mechanic. One of the three boots came off after approximately seven hours of flying, resulting in a dent on the aircraft fuselage.

When installing a new boot on the propeller, we observed the adhesive did not separate from the blade. The boots on this propeller are long strap boots. If properly positioned during spinner installation, it remains contained within the spinner. Since the two remaining boots remained attached, it is likely the boot strap was not positioned properly during spinner installation, resulting in the boot separating from the blade. Goodrich p/n 4E1188-3.

Part Total Time: 7.0 hours (approximately).

Cessna 140

Failed Fabric Patch

The wing was previously repaired using the Superflight System II recovering process as outlined in their manual. During flight the fabric patch came off; the aircraft was landed with some difficulty.

To prevent any future problems with this aircraft, the repair to the wing will be

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