# SDR CALA2026020213489

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2026
- Submitted: February 2, 2026
- Operation: Air carrier
- Aircraft: [N27509](https://openairdocs.org/aircraft/N27509), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43443
- Aircraft time: 17,642 hours, 5,901 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Window Frame
- Part number: 141A481056
- Part serial: 17026H7078
- Condition: Damaged
- Location: Zone 200
- Part time: 7,104 hours, 2,392 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/CALA2026020213489

## Discrepancy

LOUD SQUEALING COMING FROM FO FRONT WINDOW AREA. DEBRIEFED CREW SQUEALING COMING FROM RIGHT SIDE OF FO FRONT WINDOW IMAGE LABOR UPDATE R2 WINDOW LEAKING FROM THREE DIFFERENT ARES,   VERIFIED LEAKS.  REMOVED R2 WINDOW TO INSPECT PRESSURE SEAL.  FOUND SEAL FLAT SPOTTED & COMPRESSED IN TWO LOCATIONS AND WILL NOT MAKE A PROPER SEAL.  WORK PERFORMED IAW AMM 56-12-11-000-801, & AMM 56-12-11-200-801.  DURING PRE-INSTALLATION INSP FOUND NEW WINDOW FRAME DAMAGED.   STARTED INSTALLED & ADJUSTMENT OF WINDOW IAW AMM 56-12-11-820-801, & 56-12-11-400-801 UP TO AND INCLUDING STEP F.4..  PERFORMED RT SLIDING WINDOW INSTALLATION IAW 56-12-11-400-801 UP TO AND INCLUDING STEP H 3. PRESSURE TEST FAILED LEAK STILL PRESENT REQUIRES FURTHER ADJUSTMENT.   PERFORMED ADJUSTMENT ON NR 2 SLIDING WINDOW, ADJUSTMENT OK.  PERFORMED CABIN PRESSURE LEAK TEST. LEAK CHKD GOOD.  NO HISSING SOUND INSIDE FLT DECK OR LEAK DETECTED. IAW AMM 05-51-91-790-801. OK TO CONTINUE.

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