SDR DL73S962518

Service difficulty report · Mount · Boeing 737232

Difficulty date: October 23, 1996
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N310DA
Make and model: Boeing 737232
Aircraft serial: 23082
System (JASC): 7120 · Engine Mount Section
Part: Mount
Condition: Corroded
Location: Engine
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

THE FWD ENGINE MOUNT HAS TWELVE BOLT HOLES THAT ARE USED TO ATTACH TWO COVER PLATES TO EITHER END OF THE MOUNT, SIZE HOLES PER COVER PLATE. THE TWELVE BOLT HOLES WERE FOUND WITH CORROSION IN THEM. THE BOLT HOLES WERE OVERSIZED TO .400/.407 TO REMOVE THE CORROSION. THE ENGINE MOUNT IS MADE FROM 4340 STEEL HEAT TREATED TO 270-300 KSI. THIS ER/A AUTHORIZES THE REPAIR OF THE BOLT HOLES.