Service difficulty report · Pressure Deck · Boeing 73773V

Difficulty date
July 19, 2023
Submitted
August 15, 2023
Operation
Air carrier
Aircraft
N7839A
Make and model
Boeing 73773V
Aircraft serial
30243
Aircraft time
63,332 hours, 39,016 cycles
Part
Pressure Deck
Part number
UNKNOWN
Condition
Cracked
Location
Zn 200 Fus Top
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

PASSENGER CABIN HORIZONTAL PRESSURE DECK WEB HAS CRACK BS663+2 RBL41 WL202. MARKED<[01] UPDATED MEASUREMENT TABLE;[02] CUT AND REMOVED THE DAMAGED PART OF THE PASSENGER CABIN HORIZONTAL PRESSURE DECK WEB BETWEEN RBL 40 AND RBL 60 W SRM 53-40-51-2R-2;[03] REQUEST NDI TO HFEC INSPECTION ALONG THE TRIM LINE ; HOLE PROBE INSPECTION OF ALL EXISTING FASTENER HOLES IN THE REPAIR AREA FOR CRACK FREE CONDITION ( THERE IS NO EXISTING FASTENER COUNTERSINKS IN THE REPAIR AREA );[04] EDITED REF. ON STEP 4;[05] ACCOMPLISHED A 0.040' INSURANCE CUT IAW SRM 53-40-51-2R-2 REPAIR 2;[06] FABRICATED -1 DOUBLER FROM 0.080' 2024T3 CLAD LOT# 1523189-2 ; FABRICATED -2 STIFFENERS (7EA) FROM BAC1505-100052 #7075T651 EXTRUSION LOT# 1526804-1 ; AND FABRICATED -3 WEB FROM 2024T3 ; 0.063' CLAD LOT # 1507920-1 ; LOCATED ; DRILLED AND APPLIED A CHEMICAL CONVERSION COATING TO ALL REPAIR PARTS IAW SRM 53-40-51-2R-2 REPAIR 2 APPLIED PRIMER TO ALL REPAIR PARTS AND REWORKED AREAS IAW SRM 53-40-51-2R-2 REPAIR 2 OK TO INSTALL;[09] VERIFIED COMPLETION OF CORRECTIVE ACTIONS 8.<BR>OK TO INSTALL REPAIR PARTS GIVEN;[10] REPAIRED PASSENGER CABIN HORIZONTAL PRESSURE DECK WEB BS663 TO BS 675 RBL41 BETWEEN RBL 25 TO RBL 60 WL202 ; INSTALLED ALL REPAIR PARTS AND APPLIED A FILLET SEAL AND CIC TO THE REPAIR AREA IAW SRM 53-40-51-2R-2 REPAIR 2;[11] COMPLETED STEPS 1 ; 2 AND 3;[12] VERIFIED COMPLETION OF CORRECTIVE ACTIONS 10.;[13] VERIFIED COMPLETION STEPS 1-3 AND MEASUREMENT TABLE.

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