# SDR YAXA2017022801

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 27, 2017
- Submitted: February 28, 2017
- Operation: Air carrier
- Aircraft: [N765KP](https://openairdocs.org/aircraft/N765KP), registered now
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Aircraft serial: 318253012
- Aircraft time: 11,478 hours
- System (JASC): [2140 · Heating System](https://openairdocs.org/jasc/2140)
- Part: Heater
- Part number: CD140481
- Part serial: 2424
- Condition: Leaking
- Location: Zone 100
- Part time: 866 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YAXA2017022801

## Discrepancy

PILOT REPORTED SMELL OF EXHAUST IN CABIN AND CO DETECTOR STARTED TO CHANGE COLOR WHEN RUNNING CABIN HEATER IN CLIMB. A PRESSURE DECAY TEST REVEALED A BREACHED COMBUSTION LINER IN THE CABIN HEATER (865.6 HOURS SINCE NEW). THE CABIN HEATER WAS REPLACED WITH NEW. THIS IS THE 2ND CONSECUTIVE HEATER BY THIS MANUFACTURER THAT HAS EXPERIENCED A SIMILAR FAILURE AT LESS THAN 1000 HOURS SINCE NEW. THE ROUTINELY SCHEDULED PRESSURE DECAY TESTS DO NOT START UNTIL 1000 HOURS SINCE NEW.

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