# SDR MEX2003156

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2003
- Submitted: May 14, 2003
- Operation: Air carrier
- Aircraft: N501AM
- Make and model: Doug DC-9
- Registry model: [Doug DC-9](https://openairdocs.org/model/douglas-dc-9) (OpenAirDocs)
- Aircraft serial: 49188
- Engine: Pwa JT8D
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Part number: 39271411
- Condition: Failed
- Location: Lt A/C Pack
- Part time: 6,463 hours, 4,811 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MEX2003156

## Discrepancy

AIRCRAFT AIR TURNBACK, DURING CLIMB AT 8,000 FT THE (TAIL COP TEMP HI) COMES ON.  IT WAS VERIFIED BY LEAKS AND THE ENGINE EXTINGUISHER WAS CHECKED ON HIGH TEMPERATURE DECAL.  NO LEAKS WERE DETECTED.  THE LT AIR CONDITIONING PACK WAS DEFERRED BY MEL.  THE PRESSURE REGULATOR VALVE WAS REPLACED IAW MM.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.