# SDR CALA2026031814641

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2026
- Submitted: March 18, 2026
- Operation: Air carrier
- Aircraft: [N839UA](https://openairdocs.org/aircraft/N839UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1507
- Aircraft time: 72,935 hours, 32,804 cycles
- Engine: Iae V2522A5
- Engine time: 2 hours, 1 cycles
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: Solenoid
- Part number: AC69576
- Part serial: EHF174
- Condition: Corroded
- Location: Nr 2 Engine
- Part time: 700,002 hours, 700,001 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026031814641

## Discrepancy

PRESURIZATION SYS V/S  FLUCTUATES + - 800FT  CONSTANTLY CONSTANT LY IN FLIGHTCAPT REPORTS THE V/S FT/MN INDICATION ON CAB PRESS PAGE KEPT FLUCTUATING UP AND DOWN WHEN SWITCHED TO MANUAL MODE INDICATION WENT FULLY CLOSED.  CAPT ALSO REPORTS BLEED 2 INDICATION WAS ALSO FLUCTUATING FROM HI TO LOW.  RECENTLY INSTALLED NR 2 ENG CHECK LINES FROM THE PYLON TO THE PRV & CHECK THE LINES FROM THE PRV TO THE HPV & 4029KS SOLENOID FOR ISSUES.  STARTED HEALTH CHK OF NR 2 ENG IAW TASK 36-11-00-720-804-A-01. UP TO BUT NOT INCLUDING STEP 3. H. DURING THE PNEUMATIC PRV TEST FOUND THE PRV LEAKING AT PNEUMATIC PORT.  REPLACED NR 2 ENG PRV IAW AMM 21-63-52-400-001-A.

---
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.