# SDR AALA201908139035

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 11, 2019
- Submitted: August 13, 2019
- Operation: Air carrier
- Aircraft: [N758US](https://openairdocs.org/aircraft/N758US), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 1348
- Aircraft time: 48,449 hours, 31,998 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Control Valve
- Part number: 746A000006
- Part serial: 00165
- Condition: Unreliable
- Location: Bleed Valve
- Part time: 64,665 hours, 28,038 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201908139035

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT DECLARED EMERGENCY ON ACCOUNT OF PRESSURIZATION ISSUE. ON TAKEOFF/CLIMB OUT ALL COCKPIT AIRFLOW STOPPED. TEMP TO 83 DEGREES F AND RISING. SHORTLY AFTER COCKPIT AIRFLOW WENT FULL, EARS POPPED AND SUPPLY TEMPS DROPPED TO 14-16 DEGREES. CABIN TEMPS HOT IN FWD, COLD IN AFT. MAINTENANCE REPLACED ENG 1 HP BLEED VALVE AND PRESSURE REGULATING VALVE, OPS CHECK GOOD. PERFORMED BITE TEST IAW AMM 36-11-00-740-001-A, OPS CHECK GOOD, NO FAULTS FOUND.

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