Service difficulty report · Sliding Window · Boeing 737724

Difficulty date
April 28, 2026
Submitted
April 30, 2026
Operation
Air carrier
Aircraft
N39728
Make and model
Boeing 737724
Aircraft serial
28944
Aircraft time
81,744 hours, 30,196 cycles
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

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

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