# SDR AALA202608134083

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 2026
- Submitted: August 14, 2026
- Operation: Air carrier
- Aircraft: [N844NN](https://openairdocs.org/aircraft/N844NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33212
- Aircraft time: 48,181 hours, 20,615 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Filter
- Condition: Leaking
- Location: Zone 100
- Stage of operation: CR
- How discovered: V
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202608134083

## Discrepancy

AIRCRAFT WAS GROUNDED: IN CRUISE HYD B PRESSURE DROPPED TO ZERO. DROPPED FROM 20 TO 10% IN 10 MINUTES. ZERO SHORTLY THERE AFTER. ALTERED BY DELLOIACONO 437809 STA DFW 12 AUG 26 AFTER SPEAKING WITH INBOUND CAPT. QTY WENT TO ZERO. MIC NUMBER 7 574321 "IN CRUISE HYD B PRESSURE DROPPED TO ZERO. DROPPED FROM 20% TO 10% IN 10 MINUTES". POST FLIGHT WALK AROUND SHOWED HYDRAULIC FLUID FROM THE WHEEL WELL TO THE APU. LARGE QUANTITY OF FLUID IN WHEEL WELL. FLUID ON NUMBER 2 TIRE. MISTIFIED HYDRAULIC FLUID ALSO PRESENT IN WHEEL WELL. MAINTENANCE FOUND RH WHEEL WELL ACOUSTIC FILTER LEAKING. REPLACED ACOUSTIC FILTER. ALL DONE IAW MM 29-11-27.

---
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.