Service difficulty report · Doubler · Boeing 73776Q

Difficulty date
April 20, 2023
Submitted
May 9, 2023
Operation
Air carrier
Aircraft
N551WN
Make and model
Boeing 73776Q
Aircraft serial
30280
Aircraft time
66,624 hours, 41,198 cycles
Part
Doubler
Condition
Corroded
Location
Zn 300 Stabilize
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 ON DOUBLER UNDER VERTICAL FIN AT WL 308 BS 1016+23 RBL 8.<EVALUATED DAMAGE ON DOUBLER UNDER VERTICAL FIN AT WL 308; BS 1016+23; RBL 8. MAXIMUM MATERIAL LOSS 0.8' X 0.8' X 0.004' ORIGINAL THICKNESS 0.040' REMAINING THICKNESS 0.036' FOUND TO BE OUT OF LIMITS DUE TO NO ALLOWABLE DAMAGE LIMITS FOUND IN SRM FOR THIS PART.;[09] VERIFIED CORRECTION ACTION ITEM 8.;[10] INSTALLED FASTENER DOCUMENTED IN STEP 1;[11] VERIFIED CORRECTIVE ACTION 10 AND THE MEASUREMENT TABLE.;[12] STEP 2<BR>OK TO INSTALL ACCESS PANEL 323AR & PANEL 323BR;[13] UPDATED MESURMENT TABLE;[14] VERIFIED MEASUREMENT TABLE COMPLETED.<BR>PROVIDED PARTIAL UPDATE FOR STEP 2.;[15] COMPLETED STEP 2 INSTALLED PANELS 323AR AND 323BR PER AMM#20-50-11 USING TOOLING SCREWGUN ID:ATS1310 S/N:1310158 DUE:10/2023;[16] VERIFIED CORRECTIVE ACTION ITEM 15.;[17] 'AS PER EA 23-153-01355; THE REWORK IS ACCEPTABLE AS A CONTINUE-IN-SERVICE CONDITION WITHOUT REPETITIVE INSPECTIONS AND NO TERMINATING ACTION REQUIREMENTS.';[18] JOB COMPLETE.;[19] JOB COMPLETE.

More about the Boeing 737-76Q