Service difficulty report · Seal · Boeing 7878

Difficulty date
July 1, 2026
Submitted
July 6, 2026
Operation
Air carrier
Aircraft
N27901
Make and model
Boeing 7878
Aircraft serial
34821
Aircraft time
52,266 hours, 6,469 cycles
Part
Seal
Part number
HSKB0EING787
Condition
Damaged
Location
R1 Window
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

F/O WINDSHIED MADE POPPI G CRACKILN NOISE IN CLIMB PILOTS REPORT THAT NOISE STARTED AT 8000 FEET AND GOT LOUDER DURING CLIMB AT FO WINDSHIELD. NOISE NOTED AT 1 TO 2 O'CLOCK POSITION. AT 25,000 FT PILOTS DROPPED ALTITUDE, NOISE WAS INTERMITTANT MORE AS ALTITUDE DROPPED. NO ARCING OR BLUE LIGHT NOTED. PRESSURIZED CABIN TO DELTA 4 DIFFERENTIAL PRESSURE IAW AMM 05-51-24-00A-280A-A. NO POPPING, CRACKLING, AIR ESCAPING, NOISE NOTED. NOT ABLE TO DUPLICATE FAULT, PRESSURIZATION COMPLETED. PER TOMC PERFORMED TORQURE CHECK ON FO WINDHIELD BOLTS ALL BOLTS TORQURED IAW AMM 56-11-01. HUMP SEAL AT 1 OCLOCK POSITION REPAIRED. FOUND TOP OTBD CORNER OF R1 HUMP SEAL DAMAGED AND SEVERAL SPOTS DISBONDED. PERFORMED HUMP SEAL REPAIR IAW AMM 56-11-00.

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