# SDR DELA200500005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 2005
- Submitted: February 24, 2005
- Operation: Air carrier
- Aircraft: N903JC
- Make and model: Lear 55LEAR
- Aircraft serial: 081
- Aircraft time: 11,923 hours, 7,208 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Adapter
- Part number: 54196501
- Condition: Cracked
- Location: Ram Air
- Part time: 11,923 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: S
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DELA200500005

## Discrepancy

HOT AIR DELIVERED TO CABIN EVEN WITH CABIN TEMPERATURE CONTROLS SET TO COOL.  INVESTIGATION REVEALED A RUPTURED AREA OF THE RAM AIR ADAPTER ASSEMBLY DUE TO CRACKING.  SUBSEQUENT HOLE IN ADAPTER ALLOWED RAM AIR TO BYPASS HEAT EXCHANGER.

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