Service difficulty report · Heater · Boeing 76734AF

Difficulty date
March 12, 2025
Submitted
March 12, 2025
Operation
Air carrier
Aircraft
N309UP
Make and model
Boeing 76734AF
Aircraft serial
27740
Aircraft time
69,134 hours, 23,640 cycles
Part
Heater
Condition
Inoperative
Location
L3 Window
Component
Window
Component part number
141T400421
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

DURING PREFLIGHT, €ŒL SIDE WINDOW€? EICAS MESSAGE DISPLAYED. €ŒINOP€? LIGHT OBSERVED.CW ADDITIONAL 2 TORQUES OF WINDOW BOLTS REF AMM 56-11-10. VERIFIED WIRES FROM L3 WINDOW TO WINDOW CONTROL UNIT ARE GOOD. REF WDM 30-41-12. REMOVED TERMINALS J9 AND J12 FROM L3 WINDOW. FOUND WINDOW TO BE OPEN FROM J9 TO J12 BAD FROM STOCK WINDOW. ORDERED NEW WINDOW. RECONNECTED BUT DID NOT TORQUE J9 AND J12. REF AMM 56-11-10. REPLACED L3 WINDOW AGAIN REF AMM 56-11-10. OPS CHECK GOOD. THIS CLEARS DEFERRAL. PLACARD REMOVED. INITIAL TORQUE APPLIED AT 0200 EDT ON 3/24/25. SEE BARCODE T3F18E006BB17 FOR SEALANT DEFERRAL. SEE BARCODE T3F18E006BB1W FOR 2ND TORQUE DEFERRAL. SEE BARCODE T3F18E006BB1X FOR 3RD TORQUE DEFERRAL.

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