Service difficulty report · Intercostal · Boeing 7378H4

Difficulty date
December 20, 2024
Submitted
January 21, 2025
Operation
Air carrier
Aircraft
N8518R
Make and model
Boeing 7378H4
Aircraft serial
63593
Aircraft time
26,817 hours, 13,369 cycles
Part
Intercostal
Condition
Corroded
Location
Zone 100
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

DOT A24-11 AFT PIT INTERCOSTAL FOR FORWARD SHIELD IS CORRODED ON UPPER SURFACE BETWEEN STATIONS 767 THROUGH 787 RBL 24 WL 156.<[01] EVALUATED AREA; VERIFIED LIMITS ORIGINAL THICKNEES:0.050'; MATERIAL LOSS: 50%; WITH THE MAX. ALLOWABLE DAMAGE 10% (0.005); THEREFORE IS OUT OF THE LIMITS I.A.W. SRM 53-60-15-1A-1 REMOVED AND INSTALLED NEW AFT PIT INTERCOSTAL FOR FWD SHIELD STA 767 - 787 RBL 24 I/A/W SRM 51-40-02-0G-0 AND BOEING DWG 146A0081 REV A;[02] C/W<BR>AUDIT C/W

More about the Boeing 737-8H4