# SDR CALA2026043015899

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 2026
- Submitted: April 30, 2026
- Operation: Air carrier
- Aircraft: [N39728](https://openairdocs.org/aircraft/N39728), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28944
- Aircraft time: 81,744 hours, 30,196 cycles
- System (JASC): [5610 · Flight Compartment Windows](https://openairdocs.org/jasc/5610)
- Part: Sliding Window
- Part number: 141A4810107CAL
- Part serial: 2397
- Condition: Leaking
- Location: Zone 200
- Part time: 30,974 hours, 11,507 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/CALA2026043015899

## Discrepancy

CAPTAIN`S LEFT WINDOW AIR LEAKING SOUND IN FLTPRESSURIZED A/C AND FOUND LEAKS AT 500FT AROUND BOTTOM OF 2L SLIDING WINDOW 56-12-11.  REMOVED THE WINDOW. STARTED TO INSTALL NEW 2L WINDOW WHEN WE INFORMED TO STOP THAT MOVE TEAM WAS GOING TO TAKE THE ACFT.  REINSTALLED WINDOW FOR THE MOVE. NEW WINDOW IS IN FORWARD GALLEY ON FLOOR. SMOOTHED AND CLEANED ROUGH PAINTED MATING SURFACES AND MOVED FWD WINDOW DRAIN LINE BACK INTO CLAMPS (COULD HAVE BEEN PINCHED UNDER SEAL. PRESSURIZED AND STILL LEAKING AND SOUNDING FROM BOTH LWR CORNERS THE ENTIRE PRESSURIZATION. REMOVED SLIDER & TRIM PIECES TO PREP FOR NEW WINDOW INSTALL.  OLD WINDOW CLOSING FORCE WAS 65LBS ON A PUSH SCALE SO IT WAS AT THE LIMIT. ADJUSTED EACH ROLLER SHIM AMOUNT TO 4 TO MATCH OLD WINDOW, REF AMM 56-12-11-400-801. PER INSTALL AMM 56-12-11-400-801 STEPS F. (8) AND F. (9), REMOVED M322 WHCU, AND ACP WINDHSIELD ELECTRICAL RESISTANCE CHECK, VERIFIED THAT H15 CODE IS PROPER WITH 67.5 OHMS. VERIFIED THAT TB5016-2 TAP IS BEING USED. RE-INSTALLED M322 WHCU. WHCU INSTALL OPS TEST REF AMM 30-41-11-400-801 STEP G. (2) STILL NEEDED.  COMPLETED AMM 56-12-11-400-801 FROM F10 TO END. PERFORMED LEAK CHECK NO LEAKS NOTED

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