# SDR CALA2025012802096

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 2025
- Submitted: January 28, 2025
- Operation: Air carrier
- Aircraft: [N464UA](https://openairdocs.org/aircraft/N464UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1290
- Aircraft time: 77,671 hours, 32,025 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Line
- Condition: Leaking
- Location: Zone 400 Hyd Sys
- Stage of operation: DE
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025012802096

## Discrepancy

HYD G RSVR LO LVL NO GREEN SYS HYDRAULICS ALT GEAR EXT AND ALT B RAKING PRECURSORY INSPECTION REVEALED FLUID LEAKING OUT OF NO.1 ENGINE PYLON DRAIN-- EVIDENCE OF FLUID ON PYLON-- REQUIRES PYLON ACCESS PANEL REMOVAL TO ISOLATE LEAK. CREW STATED AS PER THEIR QRH, SHUTOFF HYDRAULIC SYSTEM PUMP-- REQUIRES AMM RESEARCH CONCERNING HYDRAULICPUMP/FILTER REPLACEMENTS AFT PYLON PRESSURE LINE LEAKING PHOTOS ADDED PERFORMED AMM 29-00-00-280-006-A01 CHECK OF GREEN HYD SYS ENG DRIVEN PUMPS AFTER POSSIBLE CATIVATION CONDITION, CHECK OF T/R HCU, LP FILTER, HP FILTER AND CASE DRAIN DPI'S NONE EXTENDED. PER CREW P/B SWITCH PUSHED OFF QUICKLY AND ENG PUMP FIRE SOV REMAINED OPEN. #1 ENG EDP OK IN THIS CONDITION, WILL REQUIRE ENGINE RUN POST REPAIR. FOR REMOVAL OF LH PYLON MIDDLE PRESSURE PIPING, ALL STEPS COMPLETED UP TO F.(1)(B). REF AMM 29-11-49-000-013-A.  STEP F.(1)(C) CURRENTLY IN WORK ON LP 3670998. ADD EMP:U349218 BEGAN REMOVAL OF ENGINE 1 FWD FIRE BOTTLE. REF AMM TASK 26-21-41-000-001-A, UP TO AND INCLUDING STEP 4. F. (5). ADD EMP:367290 REMOVED AND REPLACED HYDRAULIC SUCTION TUBE (ITEM 2) REF AMM 29-11-49-400-013-A UP TO AND INCLUDING STEP C.(7)(C) CONTINUED INSTALLATION PER AMM AMM 29-11-49-400-013-A UP TO AND INCLUDING STEP C.7(D).

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