SDR AU970747

Service difficulty report · Beam · Boeing 747312

Difficulty date: May 27, 1997
Submitted: March 26, 2000
Operation: General aviation
Make and model: Boeing 747312
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Beam
Condition: Corroded
Location: Bs 980
Stage of operation: IN
Nature of condition: O
Precautionary procedure: K

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

What was found

(AUS) UPPER DECK FLOOR BEAM STRUCTURE AT BS 980 CONTAINED CORROSION IN AREA OF CART LIFT CUTOUT ON THE AFT FACE OF THE UPPER CHORD BETWEEN RBL 20 AND RBL 30 - CORROSION WAS CLASSIFIED AS LEVEL 2 AND LEVEL 3 - FOUND DURING INSPECTION IAW BOEING ALERT SB 747-53A2400 - MINOR CORROSION ALSO FOUND ON UPPER FAILSAFE STRAP