Piper PA-31 Navajo Chieftain — Service Bulletins
1 service bulletins reference for the Piper PA-31 Navajo Chieftain.
This Alert Service Bulletin (ASB) No. 071 addresses issues related to the combustion heaters P/N CD14048 and CD14048-1 used in Piper PA-31-350 Chieftain aircraft. It highlights the need for immediate inspections due to reported degradation of combustion tubes, which could lead to unsafe conditions. The bulletin outlines compliance options for operators, including performing a Pressure Decay Test (PDT) or temporarily disabling the heater. It emphasizes the importance of using the most current revision of the bulletin and associated manuals for maintenance and inspections. The document is crucial for maintaining airworthiness and ensuring the safety of the aircraft's heating system.
- Immediate inspection of combustion heaters P/N CD14048 or CD14048-1 is required.
- Compliance Option 1: Perform a Pressure Decay Test (PDT) within 10 hours of service.
- If the heater fails the PDT, it must be replaced or serviced immediately.
- Option 2 allows for temporary disabling of the heater if necessary.
- 2.0 man-hours are required for each PDT, with additional time for removal and reinstallation.