Service difficulty report · Intercostal · Boeing 737752

Difficulty date
September 16, 2021
Submitted
October 13, 2021
Operation
Air carrier
Aircraft
N7843A
Make and model
Boeing 737752
Aircraft serial
35786
Aircraft time
47,875 hours, 24,909 cycles
Part
Intercostal
Part number
141A52111
Condition
Corroded
Stage of operation
IN
How discovered
9
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

SUPPORT INTERCOSTAL IS CORRODED ON UPPER SURFACE AT BS 259 - 270, WL 207.54, LBL 3 - RBL 3. REMOVED DAMAGE ON INTERCOSTAL IAW SRM 51-10-02-0G-0. ORIGINAL MATERIAL THICKNESS .040' IAW SRM 53-10-51-0I-2, REMAINING MAT. THICKNESS .030' FOUND TO BE OUT OF LIMITS IAW SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1; STEP 4.B. 2, FIGURE 105. REMOVED INTERCOSTAL IAW SRM 51-40-02-0G-0. LOCATED AND DRILLED NEW SUPPORT INTERCOSTAL IAW SRM 51-40-05, AND DWG 141A5210. INSTALLED SUPPORT INTERCOSTAL IAW SRM 51-40-02, AND IAW DWG 141A5210.