# SDR ABXA20260913407

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2026
- Submitted: September 15, 2026
- Operation: Air carrier
- Aircraft: [N673AZ](https://openairdocs.org/aircraft/N673AZ), registered now
- Make and model: Boeing 767-300
- Registry model: [Boeing 767-300](https://openairdocs.org/model/boeing-767-300) (OpenAirDocs)
- Aircraft serial: 67025
- Aircraft time: 12,162 hours, 2,100 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Shutoff Valve
- Part number: 7998014
- Part serial: 900629
- Condition: Defective
- Location: Zone 400
- Stage of operation: TX
- How discovered: O
- Nature of condition: S
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ABXA20260913407

## Discrepancy

AFTER PUSHBACK, LEFT PACK 0 TO 5 PSI PRESSURE. CREW RETURNED TO GATE (BTB). L PACK PLACED ON MEL 21-51-1-1, MX PROCEDURES C/W. A/C RETURNED TO SERVICE. REMOVED AND REPLACED LH PRSOV IAW AMM 36-11-09, LEAK CHECK AND OPS CHECK GOOD. PERFORMED ENGINE RUNS IAW AMM 71-00-00, LEFT ENGINE DUCT PRESSURE NORMAL AT ALL THRUST SETTINGS. THIS CLEARS DI 76906. PLACARDS REMOVED. MEL REACTIVATION C/W. A/C REMAINS NO ETOPS AND RETURNED TO SERVICE.

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