Service difficulty report · Intercostal · Boeing 73776N

Difficulty date
April 4, 2018
Submitted
February 14, 2022
Operation
Air carrier
Aircraft
N7731A
Make and model
Boeing 73776N
Aircraft serial
32677
Aircraft time
38,714 hours, 18,449 cycles
Part
Intercostal
Condition
Corroded
Location
Aft Cargo Bay
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

**CORROSION** (ACB) INTERCOSTAL HAS CORROSION ON LOWER SURFACE AROUND NUTPLATES B.S.787-847; RBL19; WL154. / DAMAGE EVALUATION ON ACB SUB-THRESHOLD WEB BS 787-847 RBL 19 WL 154 WAS FOUND TO BE OUT OF LIMITS. DUE TO DAMAGE PROXIMITY TO HOLES PER SRM 53-00-53. REMOVED AND INSTALLED NEW WEB PER SRM 51-40-02; DWG 146A8120; DWG 146A8121; MM 51-31-00; SRM 51-40-05 87713U 11APR18

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