Squawk Box

September 2001 Issue

Hot Stuff

Janitrol heater failure points to need for inspections before cold weather sets in

The following information is derived from the FAA’s Service Difficulty Reports and Aviation Maintenance Alerts.


An FAA certified repair station received a Janitrol cabin heater combustion head in exchange for a new part purchased by a customer. The trade-in combustion head had a hole approximately 0.4375 inches in diameter burned through it and the entire part was severely corroded.

Clearly cabin heaters are operated with minimal maintenance until they fail. A pressure decay test of this unit would have made its deficiencies obvious.

Cabin heaters are neglected during the summer, then expected to perform perfectly during the first cold snap. However, cabin heaters tha...

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