# SDR CALA2026081718652

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 14, 2026
- Submitted: August 17, 2026
- Operation: Air carrier
- Aircraft: [N72405](https://openairdocs.org/aircraft/N72405), registered now
- Make and model: Boeing 737924
- Aircraft serial: 30122
- Aircraft time: 69,232 hours, 29,104 cycles
- System (JASC): [5610 · Flight Compartment Windows](https://openairdocs.org/jasc/5610)
- Part: Seal
- Part number: PR1829B12
- Condition: Cut
- Location: Rt Nr 4 Blanking
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026081718652

## Discrepancy

SQUEAL COMING FROM R4 FORMER WINDOW FRONT BOTTOM CORNERUPDATED MAA CODE FIX USING VENDOR MAA SCREEN PLEASE CONTACT TOMC BEFORE COMMENCING ANY WORK. TOMC UPDATE: CREW REPORTED SQUEAL STARTED AT FL180 & GOT LOUDER AS THEY CLIMBED. AT 5 PSI, SOUND GONE. DESCENDED TO FL290, REPRESSURIZED TO 7.5 PSI, NOISE STILL GONE.  REMOVED RT EYEBROW PAD, LOWERED SUN VISOR TRACK, & REMOVED DECORATIVE COVER & INSULATION TO GAIN ACCESS TO NR 4 RT WINDOW BLANK.  FOUND TORN O-RING SEAL.  THIS IS THE SUSPECTED CAUSE OF LEAK. PLASTILOCK SEAL & GASKET, REF AMM 56-11-41-400-801-C1 SECTION D. (1)(C) & AIPC 56-11-51-02 FIG ITEM 60A & 60B) SHOULD ALSO BE REPLACED WHEN WINDOW BLANK IS REMOVED & REINSTALLED.   R & R DAMAGED SEALS & REINSTALLED BLANKING PLATE IAW AMM 56-11-41. PERFORMED LEAK CHECK, PLUG CONTINUES TO LEAK. REPLACED R4 WINDOW BLANK SEAL AGAIN. PRESSURIZED AC TO 5 PSID. NO SQUEAL/LEAKS NOTED. WINDOW PLUG INSTALLATION COMPLETE UP TO STEP D(1)(G), STILL NEEDS FINAL TORQUE CK. WINDOW SEAL REPLACED & LEAK CHECKED GOOD.

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