SDR FDEA201105251988

Service difficulty report · Firewall · Boeing 757232

Difficulty date: May 25, 2011
Submitted: June 8, 2011
Operation: Air carrier
Aircraft: N992FD
Make and model: Boeing 757232
Aircraft serial: 22912
Aircraft time: 74,746 hours, 36,427 cycles
System (JASC): 4910 · APU Cowling/Containment
Part: Firewall
Part number: 6AL4V032
Condition: Chafed
Location: Apu Bay
Stage of operation: IN
How discovered: V
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

APU COMPARTMENT FWD FIRE WALL HAS CHAFING MARKS 20" FROM BOTTOM EDGE OF COMPARTMENT. CHAFE MARK FOUND TO .004" DEEP, DETERMINED TO BE OUT OF LIMITS IAW SRM 53-80-01 FIG 101 DETAIL IX PG 109. REPAIRED DAMAGE IAW SRM 53-80-08, FIG 201, SHEET 1, PG 201, STA 1885, LBL-14". MAJOR REPAIR.