Incident Overview
A pilot encountered a landing gear malfunction during approach, prompting attempts to extend the landing gear using both normal and emergency procedures. All efforts to lower the gear were unsuccessful. The pilot subsequently executed a gear-up landing on a foamed runway.
Investigation Findings
Post-incident examination revealed that the landing gear power pack solenoid, part number 1280830-1, had become stuck, which prevented the landing gear from extending. This component was identified as the direct cause of the malfunction.
Manufacturer Service Information
Cessna Aircraft had previously issued Service Letter SE-76-24, dated November 22, 1976, recommending replacement of the affected solenoid (part no. 1280830-1) with an improved model (part no. 9881201-1). The recommendation specified that the replacement should be performed at the next 1000-hour overhaul or annual inspection, whichever occurred first.
Maintenance History
The last annual or progressive inspection on the aircraft was performed on November 15, 1982. No information was provided regarding whether the solenoid replacement had been completed prior to the incident.