# SDR UQM2002F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 23, 2002
- Submitted: March 7, 2002
- Operation: Air carrier
- Aircraft: [N900TS](https://openairdocs.org/aircraft/N900TS), registered now
- Make and model: Piper PA-23-250
- Registry model: [Piper PA-23-250](https://openairdocs.org/model/piper-pa-23-250) (OpenAirDocs)
- Aircraft serial: 277405429
- Engine: Lyc IO540C4B5
- System (JASC): [2140 · Heating System](https://openairdocs.org/jasc/2140)
- Part: Heater
- Part number: 37D77
- Condition: Inoperative
- Location: Cabin
- Stage of operation: IN
- How discovered: V
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UQM2002F00000

## Discrepancy

REMOVED HEATER FROM AIRCRAFT, 12 VOLT STYTEM AND FOUND (PN 45D70-1A) 24 VOLT.  NO ENTRY IN THE AIRCRAFT LOG BOOK OF HEATER REPLACED.  AFTER TALKING TO OVERHAUL SHOP, THEY ARE THE SAME HEATER EXCEPT ONE IS A 12 VOLT AND THE OTHER 24 VOLT ON THE COMPONENTS.  HEATER WAS REPLACED WITH CORRECT UNIT FOR SERIAL NUMBER OF AIRCRAFT.  PROBABLE CAUSE:  FIELD OVERHAUL AND TRYING TO MAKE A GOOD HEATER OUT OF SEVERAL JUNK HEATERS.

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